8RDA/+ chipset mod? [Archive] - XtremeSystems Forums

Jeff

12-30-2002, 02:44 PM

water_cooler 20

12-30-2002, 08:05 PM

I been tring to find a mod for this 2 since i'm going to cool it with chilled water.

AKRedneck

12-30-2002, 10:22 PM

Here is what I'm guessing is the chipset voltage regulator..

Just below and to the right of the southbridge, labeled LD1117.

It has a tab on top and 3 legs on the bottom.. Measured the Vout at 1.598v, Vin at 3.208v, and Ground at 0.349v

Per the datasheet it is the SOT-223 packaging.

Now, how do we adjust Vout?...if this is even the correct voltage regulator..? hmm, pot from ground pin to ground???

THIS (http://www.st.com/stonline/books/pdf/docs/2572.pdf) is the datasheet for the voltage regulator in question....

:D

Caper

12-30-2002, 10:35 PM

Hmm...I found it I think.
Just above Bios chip.

Mine is labeled:
ATC 213
1117

AKRedneck

12-30-2002, 10:47 PM

Originally posted by Caper
Hmm...I found it I think.
Just above Bios chip.

Mine is labeled:
ATC 213
1117

Yep, that would be the one I'm looking at.. If you have a multimeter, could you measure the voltage on yours?

Caper

12-30-2002, 10:50 PM

I have no multimeter here right now.
Just got home after working nightshift.
I can pick one up and measure when I get up...but I do need instructions where to measure.
This is NOT my stuff :)

Edit: When looking at the datasheet I found it.
I´ll do it when I get up from bed.

TPR- Darwin

12-31-2002, 05:32 AM

Jeff why do you have to put thoughts in my head like that ?

I really dont need to start prodding my P4T533 with a voltmeter................oh go on then :slobber:

Learn

12-31-2002, 05:40 AM

hello

the regulator is the IR 3037A (at the bottom of the dimm)

DATASHEET here (http://www.irf.com/product-info/datasheets/data/iru3037.pdf)

a friend have doing this mod.

it 's the FB pin to ground

water_cooler 20

12-31-2002, 06:32 AM

do the nb and sb have diffrent regulators

Learn

12-31-2002, 06:45 AM

i have doing this mod (for verification)

pin 1 (fb) with 50k poti 18rpm

i have a 8rda+ revision 1.0

http://membres.lycos.fr/ftpad/images/vdd.gif

Holst

12-31-2002, 08:27 AM

nice 1.

What do you have to set the 50k pot to to get 1.9v ?

Are you going pin 1 to pin 4 ? (with 1 being Feedback and 4 ground)

muzz

12-31-2002, 09:13 AM

Looks good.. I'kll be watching this one

Good Job Learn.. thanks for the heads up!

muzz

Learn

12-31-2002, 09:21 AM

no prob :D

i have measured 550 ohm for 1.90 v of the vdd

my ground is in the molex 4 connector

pin 1 of 4 must be working

i have changed my 50k for an 1k poti :D

i have turned my 50k poti to fast ... 2.41v (in the bios) lol !

sorry for my bad english

[H]AMDGamer

12-31-2002, 09:24 AM

so witch is it the LD1117 or the IRU3037?

Holst

12-31-2002, 09:39 AM

I allways use cermet pots as you can get much better resolution, so your less likely to accidentally overvolt by loads.

A 1k pot will make things safer.

At least you didnt blow anything at 2.4v

Holst

12-31-2002, 09:40 AM

its 3037

[H]AMDGamer

12-31-2002, 09:40 AM

if he says 550 ohms give you 1.9 volts i can just use a 550ohm resistor from pins 1-4 correct?

also are you people soldering on or uing those SMD grabbers?

Holst

12-31-2002, 09:47 AM

Id never recomend using an SMG grabber long term, ive found them to move and give bad contacts.
There handy for testing stuff out, but thats all.

Good old solder for me.

I havent done this mod yet, Learn has put 500ohms between pin 1 and ground (molex connector in his case)

Id prefer to use the chips own ground (keeps things constant) so id put a 1k cermet pot between pins 1 and 4, or if you can onto surface mounts connected to those pins (my prefered methood as soldering to the IC is harder than a surface mount resistor)

[H]AMDGamer

12-31-2002, 09:56 AM

holst i got a Huge thread about the 8RDA+ over at [H] if you want to check it out http://www.hardforum.com/showthread.php?s=&threadid=543944

right now im stable at 200 FSB Synch and ram timings @ 4-2-2-2 but anything over 200FSB is not stable now i have had a 200FSB barrier on my 8RDA+/ KX7-333R and A7N8X im suspecting its my §§§§ty 300watt PSU so i orderd the TTGI 520 watt PSU

the vdd on my 8rda+ 1.56-1.58

im guessing though i have a PSU problem im hoping my new 520Watt will fix it up and if not im gunna do this mod

Caper

12-31-2002, 11:09 AM

Originally posted by Learn
no prob :D

i have measured 550 ohm for 1.90 v of the vdd

my ground is in the molex 4 connector

pin 1 of 4 must be working

i have changed my 50k for an 1k poti :D

i have turned my 50k poti to fast ... 2.41v (in the bios) lol !

sorry for my bad english

Thanks for the great info :)

With this modification, are you able to run higher fsb than before?

Jeff

12-31-2002, 11:20 AM

Originally posted by Caper
With this modification, are you able to run higher fsb than before?

That's the $1,000,000 question!!! :)

I can't wait to get home tonight and find out for myself. GREAT WORK LEARN!!! :toast:

Caper

12-31-2002, 11:27 AM

:D

Let me know how it goes for ya, I can´t do the mod yet.

Happy New Year!

DoGMaN

12-31-2002, 12:01 PM

I'm dying here guys. Does this have any payoff?

Jeff

12-31-2002, 12:45 PM

Jeff

12-31-2002, 12:53 PM

My first stable PiFast run at 207FSB!!! WHOO-HOO!!! :banana:

This is the first time I attempted this at 207 and did NOT have to re-install Windows because of corrupt files!!! :tearinmyeye: ;)

:banana: :banana: :banana:

Onward and upward...

Jeff

12-31-2002, 01:00 PM

210 ran SuperPi and PiFast and is running Prime95 now. ;) Before this mod I would never have been able to boot into Windows fully and I damn sure would NOT have been able to run even 20 seconds of SuperPi let alone complete it and PiFast and get to test 3 of Prime95.

Damn fine job Learn!!!

215MHz FSB ran SuperPi and PiFast and is running Prime95 now... :D Remember when I was stuck at 205MHz? ;)

muzz

12-31-2002, 01:25 PM

Looking to me like I will have 2 mods to do now...........:D

magnux

12-31-2002, 01:30 PM

Can someone snap a picture of the finished mod?

I know my way around with a soldering iron quite well, I'm just better when I have a diagram of sorts to go by. :)

muzz

12-31-2002, 01:51 PM

Thats fuggin awesome Jeff!!!
wtg Learn!!!

Jeff

12-31-2002, 01:57 PM

[H]AMDGamer

12-31-2002, 02:03 PM

Jeff what grabbers are those and where did you get them?

also are they small enough to fit on the leads of this surface mount IC it looks very tight

DoGMaN

12-31-2002, 02:05 PM

Awesome. Thats exactly what I wanted to hear. :D

Jeff

12-31-2002, 02:09 PM

[H]AMDGamer

12-31-2002, 02:18 PM

Originally posted by Jeff
http://shop3.outpost.com/product/2368809

This chip is about the limit as far as fitting goes. The newer surface mount chips have the pins soooo tightly packed that it's almost impossible to get this type of grabber on them.

can you tell me more about them it says there black but you got a red and black and do the ends of them have a metal click to solder on a wire?

muzz

12-31-2002, 02:24 PM

You notice anything in there getting any hotter Jeff?
SB/NB mem... ?

Jeff

12-31-2002, 02:36 PM

AMDGamer, yeah... it says black but I got a baggie with both red and black in it. And yep, they have tiny metal claws for gripping and a tab on the other side for soldering a wire onto.

muzz, the northbridge has gotten a bit warmer while the southbridge hasn't really changed. Although... I added another 80mm fan blowing across the board so that may have helped a little too.

BTW... 220MHz FSB seems to be running fine atm!!!

muzz

12-31-2002, 02:41 PM

Thats very cool munnnnnnn , I am psyched for ya considering what you have gone through to get this board to do what it should.
U deserve it......... enjoy bro!! :toast: :D :toast: :banana: :banana:

Jeff

12-31-2002, 02:46 PM

Thanks muzz!!! :banana:

You know... I'd be interested to see what your Vdd is using a DMM. If it's like 1.7v or higher then I think we can say for sure that is what has helped you. If it's only 1.6v then I think you just got lucky and are running a 'magical' setup. ;)

muzz

12-31-2002, 02:48 PM

Hopefully it is low like the USDM says... that way I may have something to look forward too.... I can't help being greedy. I want performance!!!!:D

Where do I measure again?

Holst

12-31-2002, 02:50 PM

:D :D :D

KICK ASS...

Im very pleased :D :D

can you get a thermomiter on your NB and se if you get any big temperature rises.

I would be slightly worried about burning the NB out when your pushing it hard, its worth keeping an eye on it anyway.

muzz

12-31-2002, 03:06 PM

Are you measuring off of pin 1 Jeff? or are you going by USDM?

STEvil

12-31-2002, 03:29 PM

excuse me for my ignorance, but this mod changes the nF northbridge voltage, right? Just gotta make sure 8-)

I wonder if those insanely hot running 8RDA's have higher voltage on the nb? Maybe this is the issue and they are running with too much voltage?

AKRedneck

12-31-2002, 04:27 PM

Originally posted by Jeff
AMDGamer, yeah... it says black but I got a baggie with both red and black in it. And yep, they have tiny metal claws for gripping and a tab on the other side for soldering a wire onto.

muzz, the northbridge has gotten a bit warmer while the southbridge hasn't really changed. Although... I added another 80mm fan blowing across the board so that may have helped a little too.

BTW... 220MHz FSB seems to be running fine atm!!!

Jeff, are you running dual channel @ 220.. and no screen flashes etc.?? That is great!

You guys are awesome for figuring this puppy out...! Can't wait to get the heck outta work and do this mod!!!.. I'll slap my 10 turn 50k pot on there and see what she does!! :D

Jeff

12-31-2002, 05:51 PM

The Vdd(chipset) mod described in this thread will VOID YOUR WARRANTEE!!! Only attempt the mod if you understand this and are willing to risk damaging your board since any voltage above stock can damage the voltage regulator and/or northbridge(and video card in one case). PROCEED AT YOUR OWN RISK!!!

Originally posted by AKRedneck
Jeff, are you running dual channel @ 220.. and no screen flashes etc.?? That is great!

Yep, dual channel DDR. ;) And I just installed a 680 Ohm resistor instead of the 750 Ohm and now my Vdd is up to 1.82v. At 1.79v my 220MHz failed around test 15 of Prime95. Now at 1.82 I'm at 221MHz and still working up. I'm pretty sure my RAM is going to start failing soon so I don't see the point in raising Vdd up much more than ~1.85v.

I'll slap my 10 turn 50k pot on there and see what she does!! :D

You really only need a 1k... maybe 1.5k variable resistor for this mod. The high resistance will only add a tiny amount of voltage. Wait... at 10 turns, that might be a decent resistor. :confused: I dunno, just be careful when you get on the low end of the scale. Learn already put over 2v to his northbridge by accident but he got lucky and nothing bad happened.

Let us know how it works out for you.

King_of_qb

12-31-2002, 06:44 PM

can some one take a pick of all the stuff i will need for the volt mod?

and a link to where i can get everything if possible

Holst

12-31-2002, 07:15 PM

You only need a 1k cermet potentiomiter and some wire, plus a soldering iron.
(and steady hands + soldering skills)

Thoth

12-31-2002, 08:07 PM

guys how much voltage would I get if I stuck a 10k R on there?

and where do I measure the resulting voltage from?

King_of_qb

12-31-2002, 08:21 PM

Originally posted by Holst
You only need a 1k cermet potentiomiter and some wire, plus a soldering iron.
(and steady hands + soldering skills)

so what is the variable resistor for and i am going to use smd grabbers (hands are not steady)

AKRedneck

12-31-2002, 08:28 PM

YES!!! works like a dream! just put my 50k-10turn pot on pin 1 to ground (I used case ground ~ me lazy and don't like too many smd grabbers)

I turned the resistance down untill I got ~1.66vdimm, ran some 3d mark at 205 with NO flashes, artifacts, etc!!!!! It definitely works because this was not possible before. Now it's just a question of playing with the voltage and finding out where the memory starts to become an issue..

NOTE: If you are going to use a large resistance pot, such as 50k, be CAREFUL when turning the resistance down.. The area where it starts to increase the voltage isn't untill you get down around 2k ohms or so.. Then the voltage starts to move up fast! Turn SLOW..

I think I'm gonna love this board!! :D
:banana:

Caper

12-31-2002, 09:31 PM

Yeah!!
Oh how I love to hear that the vdd mod works :)
Hopefully I will be able to join the 220 fsb club.
Now just one more thing and this board is just AWSOME...more vdimm.

[H]AMDGamer

12-31-2002, 10:04 PM

how safe is it to run PC3500 ram above 2.9 volts 24/7?

JNav89GT

12-31-2002, 10:20 PM

Originally posted by Jeff
Yep, dual channel DDR. ;) And I just installed a 680 Ohm resistor instead of the 750 Ohm and now my Vdd is up to 1.82v. At 1.79v my 220MHz failed around test 15 of Prime95. Now at 1.82 I'm at 221MHz and still working up. I'm pretty sure my RAM is going to start failing soon so I don't see the point in raising Vdd up much more than ~1.85v.

Let us know how it works out for you.

So a 680 ohm resistor herm!!!!! Tempting very tempting. My ram should be good for it. Would be very nice to get there stable at 200mhz fsb isn't stable for day to day running, just a few benches after I put my Radeon 9700 in board. Was stable at 200mhz and no more with a TI4400. Go figure.

muzz

12-31-2002, 10:33 PM

I've run my ram 2.9 almost every minute since the day I got it.. and there is np... gamer if you r worried run it at 2.77 and be happy..., but you will prolly not see the fruits bro.

JNav89GT

12-31-2002, 10:56 PM

well testing my mod now. Very easy to do. 680 resistor to pins 1 and 4. PS thanks for the pic. I have 1.84v vdd now. Will test in 3d etc.. over next couple of days

thanks for info

great forum to learn this stuff in.

RichBa5tard

01-01-2003, 04:00 AM

Awesome! I told you guys high Vdd is the key to high FSB. ;)

:banana:

DoGMaN

01-01-2003, 05:34 AM

Awesome. I can't wait till my board gets here. How much you wanna bet I have the warranty void in the first 10 mins :D

Jeff

01-01-2003, 05:39 AM

Originally posted by RichBa5tard
Awesome! I told you guys high Vdd is the key to high FSB. ;)

:banana:

:thumbsup: You were 100% correct! :toast:

Jeff

01-01-2003, 05:42 AM

Originally posted by [H]AMDGamer
how safe is it to run PC3500 ram above 2.9 volts 24/7?

I've run my Crucial PC2100 RAM at 3.1v to 3.2v for over a year now without a problem. I've also run my Corsair XMS RAM between 3.0v and 3.22v for the past 8 or 9 months without a problem.

Just make sure you have decent air flow around them so they don't overheat and you should be fine. (just remember, this is at your own risk and if they blow... it's your fault not mine) ;)

water_cooler 20

01-01-2003, 06:38 AM

I will be cooling my ram and chipsets with chilled water what r the safe volts for my broad.

Bravo

01-01-2003, 07:56 AM

Im wondering if i should do this, i can pretty much do 215mhz Prime95 stable with a single stick, and do "post/benchmark" shots up to 226mhz.

I think i'll hold off until the second stick comes, i will probably see an improvement in overclocking then.

WinXP

01-01-2003, 08:01 AM

Thanks Jeff & Learn for the mod, good work. Installed it this morning to start testing it. I set the variable resistor to 800 ohms before installing an at first boot in pc health showed 1.80v vdd, mbm 1.81v. Right now set at 205fsb an 2.63v for memory where it was taking 2.77v before an noticed the vcore does not flucuate now. It seems to have help stablize the system more. Thanks for posting the mod.

RichBa5tard

01-01-2003, 09:10 AM

I've got only a 10k variable pot at hand and i'm eager to try it out.

It won't hurt using this resistor instead of a 1k, no? I'll start with pot set to max resistance and turn it slowly until i'll reach 1.8Vdd. Is this the right way to work? Please give me your opinion, because I've got bad experiences with voltmods. :)

xtreme

01-01-2003, 09:20 AM

hi ! mhmm i've only 430OHM resistors here :( what do you think... its too dangerous ? What VDD would I have then ?

Jeff

01-01-2003, 09:21 AM

Originally posted by muzz
Where do I measure(Vdd) again?

I had a brain fart muzz. I'm not sure where to measure it with a DMM. I tried measuring all the pins on 3037 and none of them seemed like Vdd.

I guess we just have to trust the BIOS, MBM, and USDM for now. ;)

Jeff

01-01-2003, 09:24 AM

[The Vdd(chipset) mod described in this thread will VOID YOUR WARRANTEE!!! Only attempt the mod if you understand this and are willing to risk damaging your board since any voltage above stock can damage the voltage regulator and/or northbridge(and video card in one case). PROCEED AT YOUR OWN RISK!!!

QUOTE]Originally posted by xtreme
hi ! mhmm i've only 430OHM resistors here :( what do you think... its too dangerous ? What VDD would I have then ? [/QUOTE]

430 Ohms would be approaching 2.0v... I don't think you want to do that but it's really up to you. I don't think anybody has fried thier board yet so nobody really knows what too much is. My gut says that 2v is too much but who knows.

RB, just be careful when you get to the lower range of that pot. The voltage goes up quick from 1k to 550 Ohms so you can go from 1.7v to 2.0v in a hurry.

magnux

01-01-2003, 09:57 AM

A potentiometer is just an adjustable resistor, right? I'm getting ready to hit radio shack, and I want to make sure I get the right thing. Anyone get their stuff from there, if so, what P/N? :)

Better yet, here is the link to the potentiometers @ RadioShack (http://www.radioshack.com/category.asp?catalog%5Fname=CTLG&category%5Fname=CTLG%5F010%5F003%5F000%5F000&Page=1). Which one of these do I need? Or, would it just be easier to pick up a normal resistor?

Jeff

01-01-2003, 10:03 AM

xtreme

01-01-2003, 10:05 AM

hmzz dont want to wait till tomorrow... it would gave me about 1.97V vdd... hmmz. to much ?

magnux

01-01-2003, 10:23 AM

I've found numerous 1k ohm resistors, all have various wattage ratings (ie 1/4W, etc..) I don't seem to be able to find any variable resistors on RadioShack.com however..

WinXP

01-01-2003, 10:33 AM

Get this one from rat shack:
http://www.radioshack.com/product.asp?catalog%5Fname=CTLG&category%5Fname=CTLG%5F010%5F003%5F006%5F003&product%5Fid=271%2D342
This is basically like the one I am using, get a cheap multimeter while you are there to measure resistance or ohms to adjust before installing. Use one of the outer pins an middle pin. This is a trimmer pot.

Jeff

01-01-2003, 11:41 AM

magnux

01-01-2003, 11:45 AM

Ok, I just picked up a 1k-Ohm 15-Turn Cermet Pot. Now, how do I exactly go about adjusting this? I understand I use the adjustment screw, but how far do I turn it initially, and when adjusting, do I do it while the PC is on and watch my VDD, or do I shutdown, make adjustment, then turn back on?

Also, which pin on the pot is ground?

STEvil

01-01-2003, 12:07 PM

Center pin, if theres 3 pins.

Solder on 2 wires, to center and one other, and then measure the resistance between the wires. Turn to max resistance and install. I would suggest adjusting in realtime so you can see the affects.. Just go slow 8-)

We need a vdimm mod.. 8-)

Someone should do this to their NF7-S? 8-)

Crazymofo

01-01-2003, 02:03 PM

Anyone know of an online guide to soldering, yeah I realize thats a lame question but of all the times I have tried soldering I have really sucked at it. But with all these sweet results I'm gonna want to do this! Good job on all the work you guys have done! Thanks

Learn

01-01-2003, 02:48 PM

Originally posted by Caper
Thanks for the great info :)

With this modification, are you able to run higher fsb than before?

hello and happy new year !

no gain for me in synchro mode.
i need to do the v-ddr mod .

but, i have a strange prob with my 8rda+, the monitor turn off with 204fsb (in 3D) (agp set to 66,and agp 8x disabled) . and when i use 2.1v and 2600mhz the monitor turn off when i load windows.(no prob with 2.05v to load windows at 2600mhz). when i ventilate the mosfets i can use 2.075v, 2.05v without ventilate the mosfet.
with my old 1600+ , i have no problem with 2.2v and 1900mhz.
it' s not the psu, i' have trying two psu (ttgi 500ss and antec 480w) same prob.
i ' ll buy an second 8rda+ ,perhaps

Bravo

01-01-2003, 03:08 PM

Learn, I owe you a cold one :) You too Jeff (thanks for the info).

I did the modification using a MicroClip i bought from DSE this morning. The Chipset is running warmer (havent measured it, but it is warmer to the touch) @ 1.79 Vdd.

http://bravo.ausgamers.com/Epox/228.jpg
http://bravo.ausgamers.com/Epox/228-1.jpg

Not much better then my 226 result, the difference being, i didnt have to wait until 3 in the morning, with 15C ambient air. Priming so far @ 224 @ 2-2-2-5 @ 1.79 Vdd, 2.9v Vdimm.

Very Happy :)

STEvil

01-01-2003, 03:14 PM

is 250mhz FSB going to be enough with some of the new ram and a vdimm mod? 8-)

Bravo

01-01-2003, 03:18 PM

Originally posted by STEvil
is 250mhz FSB going to be enough with some of the new ram and a vdimm mod? 8-)

Who needs 250mhz FSB when 230 Dual Bank, would probably show 3.5 - 3.6gb/s

This is almost on par with Intel Memory benchmarks (DDR/i845E/G/PE etc..)

JNav89GT

01-01-2003, 03:20 PM

mine is great after vmod. Time to ditch other boards and get all NF2 :)

http://home.insightbb.com/~jcook84889/wsb/media/11903/site1041_t.JPG

RichBa5tard

01-01-2003, 04:05 PM

Yey! It works perfectly! :banana:

Previously stuck at 192FSB 100% stable, now at a whopping 215Mhz stable and rising! w000000t!

RichBa5tard

01-01-2003, 04:38 PM

Oh yeah it's defently working for me. :toast:

divine

01-01-2003, 04:42 PM

Please (http://www.xtremesystems.org/forums/showthread.php?threadid=7294) some guy can especify all i need to mod my VDD and what´s pins :confused: :toast:

br@insc@n

01-01-2003, 04:58 PM

I'm wondering if this Vdd mod is enough to reach around 210.

Well, Praetereo described a possible solution owners of a B type cpu to get higher fsb's by cutting up one of the L12 bridge and it seems to really help most ppls.

Now the question is if you have to do both mods when using a 2700+ e.g.

I'm using this configuration - 2700+ aiugb, xms 3500 and 8rda+ v1.0 - and windows freezes after a while when fsb set to 200. I measured 1.61 on the LD1117 (bios tells me 1.55/1.56, but I think it's this ic that correlates with the chipset). the sys boots at 210, but w2k then finds corrupt dll files. I think this is caused by the southbridge, which btw gets very hot.

Have you seen the two holes around the southbridge? I think there will be shipped a newer bios, which supports higher Vdd, especially for the upcoming 200 fsb barton, so then it has to be cooled down by a heatsink. Just an idea to figure out ... :D

STEvil

01-01-2003, 08:23 PM

Is the L12 mod needed with this one, though?

Has anyone measured their vdd voltage before the L12 and after?

Caper

01-02-2003, 04:20 AM

Oh, yeah :)
The mod really works...and works great too!
Note that I am still using my old Samsung PC2700 at this bench, XMS3500C2 and TwinMos PC3200 is waiting to show off later.

tweaky

01-02-2003, 04:54 AM

Is it a wise move doing this volt mod considering my NB runs at around 35C already? Do you think i'll be ok using a 720Ohm parallel resistor?

Clocker

01-02-2003, 07:12 AM

EXCELLENT WORK on discovering this mod guys. You are all very impressive! :-)

Here is the extent of my knowledge of soldering:

You use a hot iron. You melt some stuff to make a connection. I can totally screw it up and ruin my board. :-)

Soldering is definitely not for me. I've been looking around on Radioshack.com and I found the nice 1K POT but I can't seem to find any wires to grab onto the motherboard pin.

Can somebody recommend where I might get some good 'grabbers' locally?

Thanks,
Clocker

Jeff

01-02-2003, 07:20 AM

@Caper, nice results!!! :toast: What are your timings at that run? Looks like they are a bit relaxed, no? At any rate, 231 is NICE! :D

goldie

01-02-2003, 07:20 AM

Caper,
What timings are you using to get 230fsb w/ that Sammy?
Thanks.........goldie

Arz

01-02-2003, 07:37 AM

Originally posted by divine
Please (http://www.xtremesystems.org/forums/showthread.php?threadid=7294) some guy can especify all i need to mod my VDD and what´s pins :confused: :toast:

Here is a pic of mod I made. Haven't tested it yet, but hopefully it'll work :rolleyes:

Pot is 1k multiturn, red wire connected to pin 3 on pot and pin 1(FB) on 3037. Gray wire is connected to pin 2 on pot and pin 4(GND) on 3037. Pin 1 on pot is left untouched.

Hope this helps you people to make this great mod to your RDA+

If someone needs, I can send some more photos via E-mail.

Edit: Thanks for corrections, Jeff :toast:

Clocker

01-02-2003, 07:43 AM

Nevermind. I'm new here and I just found this trhead:

http://www.xtremesystems.org/forums/showthread.php?s=&threadid=1152

Sorry for being a noob. :-)

C

Jeff

01-02-2003, 07:51 AM

tweaky

01-02-2003, 08:14 AM

Hello anyone gonna answer my question? Please get over the excitement of this mod and help a man out would ya :D

King_of_qb

01-02-2003, 08:22 AM

Originally posted by Learn
hello and happy new year !

no gain for me in synchro mode.
i need to do the v-ddr mod .

but, i have a strange prob with my 8rda+, the monitor turn off with 204fsb (in 3D) (agp set to 66,and agp 8x disabled) . and when i use 2.1v and 2600mhz the monitor turn off when i load windows.(no prob with 2.05v to load windows at 2600mhz). when i ventilate the mosfets i can use 2.075v, 2.05v without ventilate the mosfet.
with my old 1600+ , i have no problem with 2.2v and 1900mhz.
it' s not the psu, i' have trying two psu (ttgi 500ss and antec 480w) same prob.
i ' ll buy an second 8rda+ ,perhaps

i have that same problem i just figured my chip didn't like that high of voltage

01-02-2003, 08:23 AM

tweaky,

35C is not too hot. Although I would use a VR for this, not sure what voltage 720ohm would give ya, hope its not too much :)

tweaky

01-02-2003, 08:27 AM

I think it will give around 1.8v, dya think thats too much? I have to have a fan blowing over my NB otherwise temps reach 60C :rolleyes:

Ok guys I have a better quality pic here if it helps at all :)

http://tweak.50megs.com/images/vdd_mod.jpg

Holst

01-02-2003, 08:39 AM

Originally posted by magnux
Ok, I just picked up a 1k-Ohm 15-Turn Cermet Pot. Now, how do I exactly go about adjusting this? I understand I use the adjustment screw, but how far do I turn it initially, and when adjusting, do I do it while the PC is on and watch my VDD, or do I shutdown, make adjustment, then turn back on?

Also, which pin on the pot is ground?

Thats exactly what you want :D

The great thing about a cermet pot is that there are multiple turns between 0ohm and 1kohm, 15 in your case. So you have to turn 15 times between one end and the other.

There will be 3 pins on the pot in a row, with the pot set to one end of the scale you can connect to the middle pin and one end to get 1k, and the middle and the other end to get 0 ohm.

then by turning dial you alter the resistance, so the end that was 1k with become 600ohm and the other end will go up to 400. Its like moving the slider on one of those big rheostats you might have seen at school, but in minuature.

Anyway... How to do the mod.

I allways like clockwise to be more voltage... so I turn the pot all the way anti-clockwise. You can tell when your at the end of the scale as you iwll hear/feel a click. measure with the multimeter to be sure.
Once your at the end of the scale measure with the multimeter for the two pins that are 1k ohm and solder thin wire to them both, insulate the third with tape (you dont want a short)

So, your pot is now set for max resistance (lowest voltage) and you increase the VDD by turning clockwise.
At this point you might want to set the pot to 600ohm or so to avoid lots of turning inside the case...

now you need to look at the pics of other peoples mods and find the chip you want to solder too.
It dosent matter which of the two wires soldered to the Pot you put where (as a resistance is the same both ways around)

one end has to go to pin 1 on the Vreg. You can tell pin 1 as there is usually a dot or mark on top of the IC to show pin 1, you can then count pins clockwist to find the others.

The other wire needs to go to earth, pin 4 on the IC is earth (as in Jeff's mod) or you can go to a motherboard standoff ot black on a molex.
I prefer to keep things neat, plus using a common earth on one IC is good pratice, so id use pin4 for the other wire.

Its difficult to explain how to solder without showing you in person.
There was a guide i saw last week but Ive lost the link.

Have fun.

shadco

01-02-2003, 08:49 AM

Originally posted by N8
tweaky,

35C is not too hot. Although I would use a VR for this, not sure what voltage 720ohm would give ya, hope its not too much :)

740 ohms gave me 1.84. I started out with 1.6.

Shad

Learn

01-02-2003, 11:32 AM

hello

i ve changed the ACPI suspend time to s1&s3, i' m not sure if it ' s my problem, but now i can do this:

http://membres.lycos.fr/ftpad/images/record-1e.gif

memory bench and super pi 1MO
http://membres.lycos.fr/ftpad/images/pi40secd%e9tail.gif

and cpu multimedia bench
http://membres.lycos.fr/ftpad/images/multi-fsb-227.gif

Caper

01-02-2003, 11:47 AM

Originally posted by Jeff
@Caper, nice results!!! :toast: What are your timings at that run? Looks like they are a bit relaxed, no? At any rate, 231 is NICE! :D
Yeah, pretty relaxed timinmgs.
2.5-4-4-7.
I´d never though it could be pushed this far at all.
I´ll put in my other memory later and see what they can do.

01-02-2003, 02:17 PM

Hi,

I wanna do this VDD mod with SMD grabbers.
But I have got a few questions before doing the mod:

-Do I need only a SMD grabber or need I anything else?
-Has anybody done the mod with SMD grabber?
-How to adjust the SMD grabber?
-How are they called in Germany?

DoGMaN

01-02-2003, 02:42 PM

@LEARN - Is that dual channel sync????

God I hope so :D

Learn

01-02-2003, 04:35 PM

yes it' s in dual channel synchro :D

timing: 2,2,2,7 aggressive 2.9v

DoGMaN

01-02-2003, 04:36 PM

Wow, thats awesome. I can't wait for mine to show up :brick: :cussing:

rainerausrs

01-02-2003, 04:43 PM

hi,

@kingxxl

smd grabber = "SMD PINZETTE" search at reichelt.de or conrad.de

u also need a SMD POTENTIOMETER or SMD TRIMMER ohms are adjustable per poti

or use a fixed WIDERSTAND

xtreme

01-02-2003, 05:14 PM

hellll yeah... rockin' on 225FSB **** stable with 1.9V VDD =)

1st loosy 3dmark http://service.futuremark.com/compare?2k1=5514704

[H]AMDGamer

01-02-2003, 05:32 PM

damn it the vdd mod stil did not do anything for me:(

so i finished the mod and booted up fine my vdd now reads a steady 1.82 so i decied to go right to 220 FSB thinking it would be ok and for the first boot it was i booted into windows fine and everything ran sandra got 3200MB/sec ran 3dmark without any lockups so im like cool it worked but then i went to run Prime95 it gave FATAL ERRORS about 1 second into the toture test so i thought 220FSB was still a bit to high so i restarted went into BIOS and changed my FSb to 215 now guess what, it would not even POST so i had to reset CMOS and go to a FSB of 210 this time it booted into windows ok but once again Prime95 gave me errors about 1-2 seconds into the test so i am back at where i started i even changed the cooling on my NB to a vantec copper iceberg

now here is something interesting it seems that my max synch FSB with my Corsair PC3500 is 200FSB @ 4-2-2-2 anything above that will either randomly not POST/BOOT or will give errors in prime 95 1-2 seconds into the toture test but i did a little expreiment i went into BIOS and cranked my FSB to 225 and changed the memory ratio from automatic withc is SYNHC to 80% and guess what it boots just fine and runs prime 95 now could this mean my Corsair PC3500 sucks or what could be my problem?

TheDong

01-02-2003, 05:43 PM

Originally posted by [H]AMDGamer
damn it the vdd mod stil did not do anything for me:(

so i finished the mod and booted up fine my vdd now reads a steady 1.82 so i decied to go right to 220 FSB thinking it would be ok and for the first boot it was i booted into windows fine and everything ran sandra got 3200MB/sec ran 3dmark without any lockups so im like cool it worked but then i went to run Prime95 it gave FATAL ERRORS about 1 second into the toture test so i thought 220FSB was still a bit to high so i restarted went into BIOS and changed my FSb to 215 now guess what, it would not even POST so i had to reset CMOS and go to a FSB of 210 this time it booted into windows ok but once again Prime95 gave me errors about 1-2 seconds into the test so i am back at where i started i even changed the cooling on my NB to a vantec copper iceberg

now here is something interesting it seems that my max synch FSB with my Corsair PC3500 is 200FSB @ 4-2-2-2 anything above that will either randomly not POST/BOOT or will give errors in prime 95 1-2 seconds into the toture test but i did a little expreiment i went into BIOS and cranked my FSB to 225 and changed the memory ratio from automatic withc is SYNHC to 80% and guess what it boots just fine and runs prime 95 now could this mean my Corsair PC3500 sucks or what could be my problem?

try to do the opposite, set the fsb to, say, 180 and do the memory at 125% (225 in this case) to see if your ram is capable of this speed. im guessing this wont work tho, being that the cpu is capable of doing the higher fsb when the ram wont.
This test will just help u pinpoint the ram as the culprit.

[H]AMDGamer

01-02-2003, 06:29 PM

Originally posted by TheDong
try to do the opposite, set the fsb to, say, 180 and do the memory at 125% (225 in this case) to see if your ram is capable of this speed. im guessing this wont work tho, being that the cpu is capable of doing the higher fsb when the ram wont.
This test will just help u pinpoint the ram as the culprit. ok i just tried FSB of 179 and ratio of 133% or whatever for 226 on the memory now it booted into windows and everything just fine but once again prime 95 gives errors 1-2 seconds into the toture test

also if it was bad ramnot FSB wise but damaged witch im testing now with memtest86 then why would it work at all?

xgman

01-02-2003, 08:41 PM

Did the vdd mod at around 740 ohms on the arda+ and vdd went from 1.58-1.6 to around 1.84 and Now can run at 220 at least whereas before I maxed out at around 212 for stability. This was in combination with cutting the L12 on a 2800+ previously which hleped get over 200 at max timings to begin with. Only problem is it really needs a sodder. there really is very little to grab on to and I feel like if i sneeze, the micro grabbers will fall off. Also I have a 9700. If it was a 4600, it would be right under the card more or less and even harder to keep on.

HMB

01-02-2003, 09:13 PM

Any chance this would work on a A7N8X? And if so could someone help me out here? :)

Pjoeloe

01-02-2003, 09:34 PM

this is the best pic I`ve got so far

http://www.xs4all.nl/~bruuuuut/vdd.JPG

Oblic

01-03-2003, 04:55 AM

What do you all thing about my noname pc2100 ?

How high do you thing i get with this motherboard ;>?

Im on my Epox 8kha+ rev 2.0 (Kt266a) and max the fsb to 146 ://

Do you think i get any higher with this new board ?

R

Fonix

01-03-2003, 05:48 AM

Okay, I know im new here but just a little round-up would be greatly appreciated, I got the test clips (grabbers), I don't have a steady hand, I got the Pot, but personally I'd really rather not do it this way, if someone could tell me what strength resistor I would need to get ~1.79 volts it would be greatly appreciated. :)

magnux

01-03-2003, 05:57 AM

To those who have soldered the leads on, were you able to do it with a standard size soldering iron, or did you need a specialty iron? I consider myself quite good with soldering, however, I did notice the area is kind of small.. it looks like it can be done, but I'd like to make sure first. :)

Oblic

01-03-2003, 06:03 AM

Someone that want 2 answer my question plz ?

I dont know if i should get it or not but;) it looks like a nice board man ;)

R:eek: :eek: :eek: :cool:

Pjoeloe

01-03-2003, 06:43 AM

Originally posted by Fonix
Okay, I know im new here but just a little round-up would be greatly appreciated, I got the test clips (grabbers), I don't have a steady hand, I got the Pot, but personally I'd really rather not do it this way, if someone could tell me what strength resistor I would need to get ~1.79 volts it would be greatly appreciated. :)

Jeff gets that with 750 ohm.

01-03-2003, 06:45 AM

rainerausrs, TheDong, Pjoeloe, Fonix, & Oblic
Welcome to Xtreme :) (hope i didn't miss any1)

Oblic,
There is no way any1 here can accurately tell you how high your PC2100 will clock in the 8RDA. I'd recommend some good PC2700 to PC3500 in the board tho to fully take avantage of the bandwidth ;)

Oblic

01-03-2003, 06:56 AM

Ya I understand that aswell but ;> the system Iam on right now have the pc2100 and I dont have aford a new memory ://

I just want 2 know what you all think ? Do you think im going over 146 ;> ?

and btw im getting the board anyway ;)

more results later guys

01-03-2003, 07:15 AM

I have some PC2100 that won't even run Cas2 @ 133FSB & I also have some that'll run Cas2.5 @ 166FSB...so you can see, its very hard to say ;)

Oblic

01-03-2003, 07:23 AM

ya thats true ;>

Fonix

01-03-2003, 07:38 AM

Thanks allot for the answer and the warm welcome ;)

Caprid

01-03-2003, 08:01 AM

Keep up the good work guys.

http://caprid.homestead.com/files/235ssmem3643-3451.jpg

In sync, Corsair XMS 2.9v Vdd 1.82 5222 timings.

:cool:

Emericana

01-03-2003, 08:15 AM

can somebody pls tell me if i can do this mod with the two vmod things i have? i have two "vmod kits" i ordered from someone at overclockers.com

What they consist of is a grabber, going to a pot, going to a ground connection.

If i hook up the grabbers to pins 1 and 4, then what pots do i turn and how much? (counterclockwise is less resistence)

01-03-2003, 08:28 AM

Emericana,

Not sure what you're asking but if I understand you correctly it should work fine dependin on the potentiometer size. Set it to max resistance & connect it to Pin 1 & grnd the other side. Then turn down the resistance slowly & watch VDD go up :)

If the pot is 1k or more then you should be fine :D

Emericana

01-03-2003, 08:40 AM

nice that is real easy! i will do that tonight (running prime on my system now and downt wanna have to turn off pc and do prime all over again)

Espen

01-03-2003, 08:54 AM

Did the VDD mod today, thanks for the info guys :toast:
I used a 680 ohm resistor that gave me around 1,8-1,82 Vdd.
Before the mod I could not run above 185fsb stable, now I can go up to 200. Anything above 200 is unstable, at 205 the system wont even post. Anyone know why I cant go any higher?
Im using two TwinMos 3200 sticks.
Thanks
Espen

gandalf027

01-03-2003, 09:10 AM

Damn .. i cannot put the grabbers, the is no space between the leg of the chip and the board. Need to do some soldiering :(

[H]AMDGamer

01-03-2003, 10:19 AM

i did the mod here with some high res pics if anyone wants to check it out

http://www.hardforum.com/showthread.php?s=&threadid=547737&perpage=15&pagenumber=1

xgman

01-03-2003, 11:38 AM

Originally posted by Espen
Did the VDD mod today, thanks for the info guys :toast:
I used a 680 ohm resistor that gave me around 1,8-1,82 Vdd.
Before the mod I could not run above 185fsb stable, now I can go up to 200. Anything above 200 is unstable, at 205 the system wont even post. Anyone know why I cant go any higher?
Im using two TwinMos 3200 sticks.
Thanks
Espen

Are you running a 2400+ or higher cpu? If so try taking the 133/166 jumper off. I also had to cut L12 bridge to get it stable and make the chip think it is a 133 part. Then I could run it all the way to 220fsb.

TheDong

01-03-2003, 12:13 PM

Thanks for the welcome N8

Originally posted by xgman
Are you running a 2400+ or higher cpu? If so try taking the 133/166 jumper off. I also had to cut L12 bridge to get it stable and make the chip think it is a 133 part. Then I could run it all the way to 220fsb.

i did the vdd mod successfully, im running at 1.84 right now, but i still cant get above 202. it seems that no matter what, the cpu will not post above 202fsb. if i set the cpu to 180 and set the ram (async) to 125%, the ram will run easily at 225. if i try the opposite, and run the cpu above 202 and the ram at 80%, it still wont post, pointing me towards the cpu as being the culprit. ive taken off the jumper and didnt help. so im thinking about cutting the L12 bridge. anyone think this could help?

edit: typos

xgman

01-03-2003, 12:22 PM

Originally posted by TheDong
Thanks for the welcome N8

i did the vdd mod successfully, im running at 1.84 right now, but i still cant get above 202. it seems that no matter what, the cpu will not post above 202fsb. if i set the cpu to 180 and set the ram (async) to 125%, the ram will run easily at 225. if i try the opposite, and run the cpu above 202 and the ram at 80%, it still wont post, pointing me towards the cpu as being the culprit. ive taken off the jumper and didnt help. so im thinking about cutting the L12 bridge. anyone think this could help?

edit: typos

I replied to one of your other threads, but first saying that there is no guaranty, the L12 cut helped me on my 2800+ get to 220. I also did the vdd mod which helped with stability, but just taking the jumore off didn't really hlep my cpu whereas even before the vdd mod, I noticed a decent fsb bump after cutting the L12.

TheDong

01-03-2003, 01:31 PM

Originally posted by xgman
I replied to one of your other threads, but first saying that there is no guaranty, the L12 cut helped me on my 2800+ get to 220. I also did the vdd mod which helped with stability, but just taking the jumore off didn't really hlep my cpu whereas even before the vdd mod, I noticed a decent fsb bump after cutting the L12.

but what mult are you using? im hoping to get an 11 or 11.5or even 12 mult out of 210+ fsb. at 11 *210 thats only 2310 which is only a 152 mhz overclock for my 2700+

wrx1

01-03-2003, 03:45 PM

WOW !!!
HOLD THE PHONE.
I could not get past 197Mhz - even at 6.5 multiplier

Now we are in business.
Stuck it on 220 fsb and it is fine.

I´d never though it could be pushed this far at all.

AMD only :-)
1700+ Palomino @1700 hz @1.95V
Eopx 8rda+
Corsair XMS 3000 CL2 @ 2.5-3-3-7 @2.77volts
Ati radeon 8500 250/265core @1.7V
Volcano 7+

wrx1

01-03-2003, 03:49 PM

I used a pot 1 Ohm 0.75w
Used a multimeter to test the pot beforehand and dail it in to 800Ohms resistance and stuck it on.
This pushed the VDD mod from 1.55 to 1.75volts

I thank everyone.
This has been the hardest and most rewarding overclocking since my old dual cel366 to 550 mhz on a Abit BP6.

Long life the EPOX 8rda+

Thanks Guys
!!! Happy New Year !!!

Pjoeloe

01-03-2003, 09:06 PM

Bios C31 is out! Get it here http://www.epox.com.tw/file/8RDA2C31.BIN

Stanley Jobson

01-04-2003, 02:38 AM

Originally posted by Pjoeloe
Bios C31 is out ...

since 01-01-03 ... ;)

Which resistor should I use for a maximum Vdd 1.9V?

Espen

01-04-2003, 04:04 AM

Originally posted by xgman
Are you running a 2400+ or higher cpu? If so try taking the 133/166 jumper off. I also had to cut L12 bridge to get it stable and make the chip think it is a 133 part. Then I could run it all the way to 220fsb.

Im running an 2400+ and removing the 133/166 jumper didnt work. I have just tried running the fsb at 225 and memory at 80% and it worked fine. Ive also tried running the fsb at 180 and memory at 225 and it worked fine aslo...
It seems my board doesnt like running in sync mode...

Edit: Max stable fsb in sync mode is 203fsb @ 204 the system wont even boot...

Pjoeloe

01-04-2003, 06:22 AM

Originally posted by Stanley Jobson
since 01-01-03 ... ;)
Which resistor should I use for a maximum Vdd 1.9V?
550/600 ohms. You need a good cooling on the northbridge for this ;)

One guy from the Epox Techteam @aoaforums says this "Given that this is an 8x AGP MCH, voltage isn't derived from the same channeling method as that of say a KT333 mainboard for the MCH. It is created on a pass through the IR chip that you are all retracing with the 1K ceramic or pot.

The MCH voltage is linked to the AGP voltage across certain paths only. These paths are critical for the graphics card to stay alive, or in modifed instances "dead".

We would recommend against this modification as I have stated - it will cause multiple component failure. The only way to acheive this modification would be much more complex than the modification that has been carried out. It would mean uprating a great deal of circuitry" whoops.....

Jeff

01-04-2003, 07:43 AM

So it makes you wonder what voltage increase is actually helping... the chipset or some lines for the AGP?

Like I said... my problem before the Vdd mod was my video would crap out and the video driver would corrupt. Which is really inline with what that ET is saying.

hmmmm... :confused:

KS1

01-04-2003, 12:17 PM

I am using BIOS C31.
Before Vdd mod, >210FSB = screen flash
after Vdd mod (1K Ohm resistor, 1.78V DMM reading), >225FSB = screen flash
But I am OK with this 225FSB :)
2.5-3-3-7 2x256MB OCZ PC3500 CAS2.5 Dual channel sync

Pjoeloe

01-04-2003, 06:56 PM

Yo KS1, nice country you live in :toast: what is your maximum memory speed @2-2-2?

cpulloverclock

01-06-2003, 10:15 AM

236 in DUAL DDR
vdd@2.01v
vmem@2.9v
2*Winbond 5ns
http://membres.lycos.fr/cpulloverclock79/236dual.jpg

Pjoeloe

01-06-2003, 10:51 AM

Yeah well, screens are not a good proof.....

http://www.xs4all.nl/~bruuuuut/hehe.jpg took me 2 minuts with paints lol

Cpulloverclock, how do you cool your northbridge?

cpulloverclock

01-06-2003, 11:37 AM

Originally posted by Pjoeloe
Yeah well, screens are not a good proof.....

http://www.xs4all.nl/~bruuuuut/hehe.jpg took me 2 minuts with paints lol

Cpulloverclock, how do you cool your northbridge?
sorry but I never cheat

my score is not a fake
okay? :)

for my northbridge there is a 60mm fan

Pjoeloe

01-06-2003, 11:53 AM

:) I don`t say you cheat m8, I say benchies on jpg are not a proof. 3dmark is...... with an url that is hehe (and I gues you know how paint works because you copied my reply in a jpg, and the colours of the pic are exactly the same of MS paint)

01-06-2003, 12:11 PM

Originally posted by Pjoeloe
and I gues you know how paint works because you copied my reply in a jpg, and the colours of the pic are exactly the same of MS paint

Are you referring to him quoting your reply? :)

Pjoeloe

01-06-2003, 12:32 PM

I don`t realy get it what you mean.... N8

xgman

01-08-2003, 09:26 AM

Originally posted by TheDong
but what mult are you using? im hoping to get an 11 or 11.5or even 12 mult out of 210+ fsb. at 11 *210 thats only 2310 which is only a 152 mhz overclock for my 2700+

11 & 11.5 works great now.

HMB

01-08-2003, 10:52 AM

Answer me goddammit!:slash: :D
Will this work for the a7n8x? Im too lazy to look :)

STEvil

01-08-2003, 04:13 PM

If you are going to be that lazy, then I am going to tell you no.

In fact, I cant recall anyone trying this on an Asus or Abit or any of the other nf2 boards to date..

Barracuda

01-09-2003, 09:23 AM

m8s i need a conclusion :)
what ohm resistor i must use (ohms ??)

sminker

01-09-2003, 04:30 PM

Use a 680

Mine originally was at 1.56vdd after i put on a 680 it sits at 1.82-1.84

May also try a 700-750

This mod helped alot.

before i couldnt even post into windows without it rebooting at 205.

now im at 220 6,2,2,2

CyNix

01-10-2003, 02:48 PM

Is this mod going to cut down my nforce's life a few more months/years or is it going to give my nforce a life of only a few months? there is a big diff. between 2 of them.
well if the answer is the first one then I don't reallly give a damn cause I do not use my computer for more than 3/4 years. if the answer is the second one then I have re-consider about modding it. :)

Emericana

01-10-2003, 03:06 PM

well seeing how this mod has been done only a few weeks ago how are we to know long term effects?

however, just remember that abit allows you to change the voltage to 1.7v in bios so that means it should be safe to run that high assumin you got ample cooling

Ace-a-Rue

01-10-2003, 08:42 PM

Originally posted by CyNix
Is this mod going to cut down my nforce's life a few more months/years or is it going to give my nforce a life of only a few months? there is a big diff. between 2 of them.
well if the answer is the first one then I don't reallly give a damn cause I do not use my computer for more than 3/4 years. if the answer is the second one then I have re-consider about modding it. :)

Anytime you take on tampering with the m/b through mods you take on the chance of making a mistake and frying the board and possibly some other components. If you aren't a risk taker than leave it alone. I don't mean life and death type risks but the ones that might cost you some more money to replace HW because of a simple mistake in calculation.

I had a 3 way mod on my KR7A-R and it was working great until one day I attempted to adjust one of the pots and I turn it the wrong way, plus to fast!:) It cost me a board and VC. I didn't RMA it; could have. I just moved on to the next higher plain....:D

sminker

01-10-2003, 10:23 PM

Originally posted by Ace-a-Rue
I had a 3 way mod on my KR7A-R and it was working great until one day I attempted to adjust one of the pots and I turn it the wrong way, plus to fast!:) It cost me a board and VC. I didn't RMA it; could have. I just moved on to the next higher plain....:D

Thats why you dont use adjustable pots. :)

Ace-a-Rue

01-11-2003, 09:56 AM

No, I was trying to adjust something that I should of left alone since it was right after I got up in the morning and without any COFFEE in my tummie!;)

sminker

01-11-2003, 10:14 AM

Heres some VDD mod eyecandy for you people.

System specs.
2400+ AIUHB week 47 @ 1.95vcore for burn in
Twinmos PC3200 6,2,2,2 @ 2.9vdimm
WD 1200JB Harddrive
GigaByte 9700 Pro
Thermalright SLK-800

This is the limits of my system on AIR. Watercooling will be here next week.

Video card is not overclocked.

This is not prime95 stable unfortunantly

3dmark
http://service.futuremark.com/compare?2k1=5592442

pcmark (reading my cpu speed wrong)
http://service.futuremark.com/compare?pcm=1002529

http://home.kc.rr.com/sminker/images/sandra225.jpg

http://home.kc.rr.com/sminker/images/superpi.JPG

KS1

01-11-2003, 02:33 PM

Correct me if I am wrong:

Since we up Vdd, I think that replacing the tiny little inductor with a bigger one might help improving the quality of the current.

The inductor smoothes out current ripple/current rush. The bigger the coil, the better the quality of the current (but higher cost for a manufacturer)

I also suspect that this might be a reason richbastad killed his MOSFET by dialling the pot too fast since by raising Vdd, NB also consumes more amps. Without adequate protection against current ripple/current rush, one might kill MOSFETs.

According to the datasheet, IRU7313 has Vdds = 30V, continuous current drain = 6.5Amp, and Rds(on)=0.029ohm.

Naughtyboy

01-14-2003, 03:46 AM

Lo fellas..!!

2 quickies.....does the wattage of the vpot need to be 0.75w or is it OK to use 0.25w..????

And also have anyone of you noticed if the IC itself it´s getting any hoter by doing this modd. Mabye it would be a good thing to put a heatsink on it...???

SupaMan

01-17-2003, 01:52 PM

OK, i need some help. When i comes to volts resistance and all that stuff i am an ABSOLUTE n00b. i have had 0 exposure to it in my life...0.

So from what i understand, you can get those little grabbers (will radioshack have them?) and then attach one to leg 1 and one to leg 4 on that chip (yeah i know which one). Then the far side of the grabber has a spot to attach a lead on it. You then attach a resistor between the two backends of the grabbers? does direction matter?
My final question is which resistor should i use? The chipset will be watercooled, so heats not really a problem. If its easy enough to disconnect and recconect resitors i wouldnt mind having a couple. do you have to solder them to the grabbers? or just wrap the lead around the contact?

thanks

Ace-a-Rue

01-18-2003, 04:59 PM

Originally posted by SupaMan
OK, i need some help. When i comes to volts resistance and all that stuff i am an ABSOLUTE n00b. i have had 0 exposure to it in my life...0.

So from what i understand, you can get those little grabbers (will radioshack have them?) and then attach one to leg 1 and one to leg 4 on that chip (yeah i know which one). Then the far side of the grabber has a spot to attach a lead on it. You then attach a resistor between the two backends of the grabbers? does direction matter?
My final question is which resistor should i use? The chipset will be watercooled, so heats not really a problem. If its easy enough to disconnect and recconect resitors i wouldnt mind having a couple. do you have to solder them to the grabbers? or just wrap the lead around the contact?

thanks

1st of all, RS does not have the right kind of grabber. They sell 'J' hook types.

2nd, it cannot work the way you want it for the SMD grabber to grab leg 1 & 4, because the end of the grabber is a single piece of copper. All you would be doing would be shorting pin 1 to pin 4.

You want to use the grabber to clip onto leg/pin 1 and then you would have a wire soldered to the grabber end. The other end of the wire would be soldered to a fixed resistor or to a variable resistance pot.

Here are similar, I STRESS SIMILAR, representations of what the project would look like:

VIEW OF SMD AND RS MINIATURE POTS
http://home.nc.rr.com/boeing/smd/parts%20needed.jpg

SMD GRABBER ATTACHED TO LEG/PIN w/SINGLE WIRE LEADING FROM IT.
http://home.nc.rr.com/boeing/smd/smd.jpg

AGAIN, I stress this is what it would look like when attached. Obviously, you would be attaching to leg/pin 1 and any case or m/b ground if using a 1K pot or fixed value resistor. It is not paramount to hook it to pin/leg 4 which is ground. ANY GROUND ON THE CASE OR M/B WILL WORK......

muzz

01-18-2003, 05:09 PM

Yep that type will work, but I like these better....:D

http://www.radioshack.com/product.asp?catalog%5Fname=CTLG&category%5Fname=CTLG%5F010%5F003%5F006%5F003&product%5Fid=271%2D342

Ace-a-Rue

01-18-2003, 05:17 PM

These are all good Muzz! keep the suggestions and ideas coming forward. This is what this forum is all about.....:)

muzz

01-18-2003, 05:19 PM

I agree brother Ace.........:toast:

I like how the store locator is included in the description..... self serve anyone??..... heheh

Ace-a-Rue

01-18-2003, 05:21 PM

Cheers!:toast:

Jeff

01-18-2003, 05:21 PM

:thumbsup:

SupaMan

01-19-2003, 04:16 PM

thanks ace :p

couple more Qs for u. in the pic it looks like your grabber is not connected to pin 1, but pin 2, am i seeing things?

I'm guessing that u can use a 1k ohm pot to have variable resitance, how do u adjust it? and when i am adjusting it, how do i tell the current resistance? i've got a multimeter, but it has a billion different settings :confused:

does radioshack sell 1kpots? u only have 10ks and 47ks in the pic

Ace-a-Rue

01-19-2003, 04:59 PM

Originally posted by SupaMan
thanks ace :p

couple more Qs for u. in the pic it looks like your grabber is not connected to pin 1, but pin 2, am i seeing things?

Remember what I said, similar, so to be interpreted as NOT EXACT. Again, you are correct. For your scenario, you will use pin 1.

I'm guessing that u can use a 1k ohm pot to have variable resitance, how do u adjust it? and when i am adjusting it, how do i tell the current resistance? i've got a multimeter, but it has a billion different settings :confused:

Pots and trimmer switches have three legs on it. You should use the middle leg as your positive connection to the SMD grabber and then one of the outer legs for ground connection. Depending on which direction you want to turn the adjusting screw to increase voltage will then stipulate which outter leg to use for ground.

If you want to turn clockwise to increase voltage then you need to find which outer lug will give you lower resistance while turning in the clockwise direction. Do you understand?

And, if you can't read or use the meter then you need some basic instruction in that area before proceeding. I would take your meter to Radio Shack and ask the person to help you with that while you buy the pot or Trimmer switch.

does radioshack sell 1kpots? u only have 10ks and 47ks in the pic

Yes they do. Muzz gave you the link showing a 1K Trimmer switch which will do the same thing as my miniature pot. Just go in the store and tell them what you want.

SupaMan

01-19-2003, 05:33 PM

k, thanks boss :p

muzz

01-19-2003, 05:44 PM

Originally posted by SupaMan
k, thanks boss :p

He ain't the boss... he's just a pee-on like the rest of us.

He just wears a raincoat........:wave:

:lol:

SupaMan

01-19-2003, 06:04 PM

heh..seriously though, ur all a whole bunch of help on this. 2days ago i was like "VDD who?" and now i have my parts ordered and am ready to go :p

muzz

01-19-2003, 06:08 PM

Just be careful, don't rush, check your work ( TWICE ) and you should be fine if you use your head, and don't adjust it too fast. too fast is a very bad thing, hence MY liking the 15turn trimmers better.

Bossman knows I'm just fuggin' with him....:)

Good Luck

muzz

Ace-a-Rue

01-19-2003, 07:33 PM

Hey, hey Muzz....Are you sure???!!! :p:D

muzz

01-19-2003, 07:37 PM

:thumbsup: :fart:

:slap: :slap:

heheh

Walrusbonzo

01-20-2003, 04:12 AM

I've done the VDD mod on my board now too. Adds to my MOSFET heatsink mod, SB heatsink mod, Shin Etsu paste between NB and NB HSF(Stock heatsink and 80mm 3000rpm fan).

1 1kohm fixed resistor and I now get 1.77~ VDD. PERFECT!

Just gonna leave things for a few days though and let it all burn in.

Then I'll see how high I can take my TwinMOS PC3200 and XP 1700+.

I'm aiming for atleast 200MHZ FSB SYNCH with RAM and about 2.2GHz on my 1700+.

Thanks for the mod details everyone!

RichBa5tard

01-20-2003, 05:05 AM

Originally posted by Walrusbonzo
I've done the VDD mod on my board now too. Adds to my MOSFET heatsink mod, SB heatsink mod, Shin Etsu paste between NB and NB HSF(Stock heatsink and 80mm 3000rpm fan).

1 1kohm fixed resistor and I now get 1.77~ VDD. PERFECT!

Just gonna leave things for a few days though and let it all burn in.

Then I'll see how high I can take my TwinMOS PC3200 and XP 1700+.

I'm aiming for atleast 200MHZ FSB SYNCH with RAM and about 2.2GHz on my 1700+.

Thanks for the mod details everyone!

If that twinmoss has winbond BH-5 chips, 1.77Vdd should bring you up to 220~225mhz sync. :)

Walrusbonzo

01-20-2003, 08:01 AM

No it has "TwinMOS" chips on the PCB, they are one sided PCBs.

One things for sure, this RAM will just NOT do Ras to Cas(RCD) of 2 when the FSB is 166MHz or higher, regardless of VRAM.

I can set TRAS to various values ok, CAS at 2 is fine, and RAS Precharge(RP) is fine at 2 also.......

Anyway....

Using CAS-2, RP-2, RCD-3 and TRAS-7 I was able to run memtest86 fine at 220MHz FSB synch with RAM.

Hopefully it'll be stable in Windows when I try on Wednesday.

Wimo

01-20-2003, 04:14 PM

Well, short question :)

Which resistor do you guys recommend for me? I'm cooling the NB with a zalman passive nb cooler + 90mm fan blowing over it..

I'm currently stuck at 175 fsb! Any higer and 3dmark gives an error like this:

Timer sanity check failed (ben: 24.900000, sys: 24.900000).

Wtf... I've never seen this error :(

Hopefully the mod will give me some more headroom

Holst

01-20-2003, 04:22 PM

750ohm is fairly safe.

175 seems a bit low to be needing more VDD, you might have a memory or setup problem.

Wimo

01-20-2003, 04:33 PM

I know.. the thing can boot and run prime for hours on 190 fsb.. but I keep getting the 3dmark errors.. Oh well... going to reinstall and hopefully it wil be fixed

Wimo

01-21-2003, 08:05 AM

Btw.. did you guys experience any weird screen flashes at higher fsb's? The screen turns black and 1 sec later it's returns :S

bowman1964

01-21-2003, 08:13 AM

yea mine flashes black right before i get to the desktop in win2000.but i am running 225fsb dual bank @3.05vdimm
2 hyperx 256mg pc3500 matched sticks

Wimo

01-21-2003, 09:06 AM

That's prob. because you overclocked your vga card with some proggie.. mine does it all the time!

bowman1964

01-21-2003, 09:12 AM

i am still on old video card no overclocking yet on mine.i am getting the board up first.find the best setting for memory and cpu and .then i will put in my r9700 running @470/750.
screen flashing doesnt bother me seams ok.i will try to run prime for a few hours to see how it does.

Wimo

01-21-2003, 10:00 AM

Ok, I'm gonna vmod the thing this tonight.. gonna try a 750 ohm resistor like Holst said.. hope it works :)

Wimo

01-21-2003, 03:16 PM

Woej, succes! I used the 755ohm resistor and now I have 1.8v vdd :)

I can run @ 200fsbx10 now :banana:

gb5766

01-23-2003, 06:02 PM

Thanks for the great info in this thread!
I was stuck at 191fsb,
but after the mod I am now at 207fsb stable!
I bumped the Vdd up to 1.85.
Now all is good even at aggressive ram settings and in Dual Channel mode.

THANKS AGAIN.

Ace-a-Rue

01-23-2003, 06:50 PM

Originally posted by gb5766
Thanks for the great info in this thread!
I was stuck at 191fsb,
but after the mod I am now at 207fsb stable!
I bumped the Vdd up to 1.85.
Now all is good even at aggressive ram settings and in Dual Channel mode.

THANKS AGAIN.

Lets see your bandwidth and 3d2001 now. I am real curious because I am contemplating an Asus N2 board over this. You might convert me since this board is easier to do the chipset mod than the Asus.

gb5766

01-23-2003, 07:29 PM

here is a quick 3dmark: http://service.futuremark.com/compare?2k1=5731371

I had about 14900 before the mod.
I ran at 11.5 X 191 before.
Now 10.5 X 208.

http://www.3-kids.com/2083d.JPG

Ace-a-Rue

01-23-2003, 07:45 PM

Nice score on the 3D2001! Memory bandwidth is comparable to the Asus. Thanks for the quick reply....:)

bowman1964

01-23-2003, 07:55 PM

yea these boards fly.what do you think?fast enough no extra cooling

Ace-a-Rue

01-23-2003, 07:58 PM

I see 225 FSB in CPUID but is that the same FSB for Sandra?

What FSB and how long did you run Prime 95?

bowman1964

01-23-2003, 08:02 PM

yes that is one of my test runs.cpu isnt running hard.i was just testing my memory and my mods to the board
fsb was running 225 dual bank memory.timming was set to 7 2 2 2

Ace-a-Rue

01-23-2003, 08:45 PM

How long have you run Prime 95 at 225 FSB?

bowman1964

01-23-2003, 09:39 PM

ran prime for 3 hours or so.
but wont complete 3d2001 at that speed.yettt.will complete 3d at 220fsb but i am working on moving it at this very moment into my phase change test unit.where i will be able to cool the chipset better than air. need.more volts to the chipset and i cool it properly with high volts there.needs 1.9 or better i think .

STEvil

01-23-2003, 11:25 PM

I dont thing pushing past 1.9 is healthy.. seems a few people have lost boards to 2.0v.. kinda like the instant northwood death thing.. 8-/

KS1

01-24-2003, 12:59 AM

as far as i know, only 1 person (richbastard) killed his board by turning the pot too fast.
other people reported running 2.0V without any problem (so long as you keep it cool). One more to consider, when you run at 2.0V, you should consider adding more capacitors and replacing a tiny coil with a bigger iductor coil.

eliteone

01-24-2003, 01:26 AM

This mod definately worked for me but I seem to have one problem...my video artifacts past 205. I have tried a VDD or 1.77 and 1.85 but that didnt solve the problem. Doing the VDD mod did however take away the screen flashes past 200fsb. I tried changing the AGP voltage and everything else I could think of. It doesnt do it at all if i dont run dual DDR mode. Any ideas?

KS1

01-24-2003, 01:38 AM

eliteone,
good to see you here and there.
you did not describe system details esp. mem module spec/brand

i run Vdd 1.78V upto 230MHz before the problem comes back

eliteone

01-24-2003, 05:11 AM

Oops, thought I had a sig here. Here goes the specs.

Athlon xp 2700
256*2 corsair pc3500
gainward gf4 ti4600

It seems setting the agp to "auto" instead of 66 or any other values cuts down the artifacts...but they're still there. Do you have an ati card or nvidia?

Ace-a-Rue

01-24-2003, 08:38 AM

Originally posted by bowman1964
ran prime for 3 hours or so.
but wont complete 3d2001 at that speed.yettt.will complete 3d at 220fsb but i am working on moving it at this very moment into my phase change test unit.where i will be able to cool the chipset better than air. need.more volts to the chipset and i cool it properly with high volts there.needs 1.9 or better i think .

So, what it looks like to me to have everything working as advertised, Prime 95 and 3d2001 looping endlessly, you have to be around 210- 218 FSB. I want a system to have no limitations so it can handle any stress that is thrown at it. Simply running one 3d2001 test is nice to know but can it handle continous looping at 220 fsb, on air cooling? Sometimes reducing the FSB by 2 mhz will allow it.

I am an air purist type of guy:p so these numbers would be where I would have to live.

bowman1964

01-24-2003, 09:05 AM

Originally posted by Ace-a-Rue
So, what it looks like to me to have everything working as advertised, Prime 95 and 3d2001 looping endlessly, you have to be around 210- 218 FSB. I want a system to have no limitations so it can handle any stress that is thrown at it. Simply running one 3d2001 test is nice to know but can it handle continous looping at 220 fsb, on air cooling? Sometimes reducing the FSB by 2 mhz will allow it.

I am an air purist type of guy:p so these numbers would be where I would have to live.

it has run prime for hour on hours with no errors at 225fsb but..
i do not believe prime stresses the memory as hard as 3d2001.

my reasoning behind that is.......
i measure my voltages and most things with a very accurate multi meter.(i am funny that way about being accurate)
i like to check volts while i am under load to watch for strange things(sometimes i will see a problem before it is real bad).and while stress testing the memory i watched the mem voltage.i had it set to 3.05 and under prime it only dropped to 3.03 while looping.but.................while running 3d2001 the voltage drops quite a bit.to just under 3.0 sometimes hitting 2.97.so when the memory is pulling more current with 3d2001 rather than prime that tells me 3d is stressing the memory alot more.
and that works out because i cant run a full test of 3d2001 at 225fsb dual back but will run prime.
turn down the speed to 220 and will run perfect no problems loops 3d all day if need be.

i even did the second volt mod to the memory and it does help alot to stablize the system.( i am not sure how many of you guys even did the second one but it does help if you run over 3.0.)

but the increase in volts to the chipset makes alot of differance to increase of fsb.i hopfilly will get back to testing sometime this weekend if my kidds dont drive me crazy lol.
:D