Radeon 9700 volt mods posted

[MrIcee]

Hi guys:)

Just stopped in to let you overclockers know we finally got a pictorial guide to volt modding the Radeon 9700 Pro posted on our site. OPPAINTER and myself and many others have tested and utilized these mods for some time now..and with xtreme cooling have been seeing GPU overclocks in the 450-500Mhz range. Come on over and check it out here :Radeon 9700 volt mods (http://www.xtremesystems.org/modules.php?op=modload&name=Reviews&file=index&req=showcontent&id=22)

Take care my friends,

Randi:D


__________________

[finalgt]

Just have one question. In the pictures, each VR has 2 wires...one connecting to the designated pins, but where does the second wire go? I can only assume it's for grounding purposes (unless I'm completely wrong...), but I'm not entirely sure where it's grounded to. Yes, I'm a noob when it comes to extreme stuff like this, hehe.

Thanks for the guide, PiLsY, Manoj, DD, and of course, Icee. :D

[CATCH22ATPLAY]

ok looks like you guys got the GPU and VDDQ/VDD volt mod correctly. BTW 454/363 zero artifacts with my 4 different volt mods and i'm using an old POS socket 370 heatsink/fan ;) But good job with your mod so far and oops edited for political reasons lmao

[Lagwagon]

Core voltage checks out ok but the mem voltage only shows 1.4 volts.This is half of the default 2.8.What am i doing wrong?

[DDTUNG]

I think you have used the wrong measuring point for Vmem.

DDTUNG:cool:

[Lagwagon]

I have closely checked Manoj Mahtani's card and it looks like
the point to check is right next to the ground wire

[Lagwagon]

Can someone please tell/show me where on the card i can check the mem voltage.

[toofast]

One thing that might be handy guy`s if you showed the voltage measurement points so you know how high you got it cranked :)

[zteve]

Thanks MrIcee, will try it next week when I get my Radeon.
Your Voltmod tutorial for the KX7 is excelent.

[Pyro]

Originally posted by Lagwagon
Can someone please tell/show me where on the card i can check the mem voltage.

ThisGUIDE (http://www.extremeoverclocking.com/articles/guides/R9700_Vmod_1.html) includes a picture of where to measure the memory voltage.

[Lagwagon]

That guide shows core modding only,not memory

[zippyc]

Hello All:

Although this thread is a little old, I still believe there is a need for clarification as to where the MEMORY voltage measure point is, not CORE as the link above covered.

Can anyone tell us where the best measurement point is for the memory?

(The scary part is I did the mod thinking I had the correct measuring point. After the mod, it clocked up to 379 on the memory and there was nothing burning, but I don't dare make any further adjustments until I can quantify the voltage changes).

Please help!

-Zippyc-

[PiLsY]

Apologies for not noticing this earlier :).

New pic posted below :

[Edited due to idiocy - well spotted DD ;)]

PiLsY.

[PiLsY]

And for the sake of completeness I edited one of Mahoj's pictures to show Vgpu measurement. Hope you dont mind m8 :).

PiLsY.

[dmitriyaz]

Originally posted by Lagwagon
Core voltage checks out ok but the mem voltage only shows 1.4 volts.This is half of the default 2.8.What am i doing wrong?
exactly the same problem here. :stick:
Lagwagon, i am wondering, are you using the original ATI?
the card i am Vmodding right now is a Gigabyte,
and while its highly unlikely, the strange 1.4v measurement might be attributed to the fact that its somehow different than the original ATI.
any other suggestions as to why that may be?
thanks

[zippyc]

Gentlemen,

I also get a measurement of 1.398V across that point, and I have a USA version of the ATI...built by ATI, so I do not believe that we have the right measurement point. The voltage does not change at that point with adjustment of my trimmer either, so I believe we will need further even further clarification on this matter.

Thanks Pilsy, for the help, but I think we are still stuck. Perhaps DDtung knows?

Thanks to all the xtreme moderators on this one!

-Zippyc-

[zippyc]

DD cleared this up for me via. PM last night, and I have taken the liberty of plagerizing the original pic. to illustrate the correct measuring point for your memory voltage. Measure the cap legs right next to the cap we were reading 1.4V from, and you'll get your readings (which DO change with the trimmer settings this time.)
:-).

I was running 3V when my memory hit the 379.93 mark in Powerstrip.

-Zippyc-

[a.p.versteeg]

I did the GPU mod and have used a 10kVR, but when I`m messured the Vgpu there is 1.7(Hercules is default already 1.6).
The 10K is messured on 8, but when I adjust I don`t messure difference in voltage. What`s wrong??
I also used a 8k and that give`s me 1.74vgpu(I use WC on the GPU) , what will bring me 7K. , higher voltage or lower?
And what`s the max voltage with water temp`s 19*C ?

Vgpu mod. @430/380 score 19863

http://service.madonion.com/compare?2k1=5091499

[PiLsY]

Ooops....

Sorry ;).

PiLsY.

[Lisch]

ok... so far my core is at 420, what do i set the 20k VR at initially for the mem volt mode?? how high is safe?

[zippyc]

Lisch,

Your resistor has less effect on raising the voltages the greater your resistance is. (think of it as no connection= infinite resistance=no volt mod IE: factory voltages.)

So in the future you can always start with whatever the greatest resistance setting is and should be safe (assuming you have the right value potentiometer or trimmer in the first place.) I adjusted a turn at a time until I got close to 7% higher voltage than factory specs and then went half a turn at a time from there. With the right variable resistor, you should quickly get a feel for how much the voltage is affected by a single turn.

I suggest you use a 20-turn trimmer for this mod as it seems to allow me to make minute adjustments very easily compared to the round tiny pot kind that requires a phillips head screwdriver to turn.

When my voltages were too high, the memory temperature became my limiting factor. When the memory thrermal probe read 50C or higher, I began experiencing slowdown on my scores and more jaggies, so I guess my advice is for you to be sure to monitor those temps closely.

Happy clocking!

-Zippyc-

[Lisch]

ok, thanks a lot!!! :)

[muzz]

I noticed that the x-bit labs mod has 1 more modification than this one, and was wondering why it has been left out of this one? He modded the memory at 2 different points,1 of them the same as this mod, but 1 under that heat shield...... did this get left out because it wasnt needed for some reason? Or because it was found out that it wasn't worth the effort to include it. I noticed the he uses fixed resistor values ( which for obvious reasons is not as tunable), like he did on the 8500 mod.
The mod page is here:
http://www.xbitlabs.com/video/radeon9700pro-overclocking/

[dmitriyaz]

appearantly, the one under the shield is for increasing voltage of memory I/O circuits,
as opposed to increasing the voltage of "inner circuitry of the graphics memory", that we all know about.
interesting, this may be the reason why only few people got decent memory overclocks with only one of the memory mods--the I/O circuits couldn't handle the speed, while the memory may be capable of more...

[muzz]

Yeah I saw what it was for, I was just wondering why DD and Randi didn't use it........ interesting. If it will make a difference, and/or make it more stable( I should say no mem tearing) at higher clocks, then it is as good as done.
Thanks for your input dimitri.

muzz

[charlie]

Yeah, I'm gettin ready to start melting...er I mean modding my card and I'm putting the final plan together. So I'll keep an eye on this as whether to include this mod...
Wish I could just take the card down to the corner neighborhood Seattle v-mod store and have someone else do it...hehehehehehe
I'm not confident soldering such small stuff and don't want 3 smd grabbers hanging around...
C

[TheDude]

Originally posted by charlie
Yeah, I'm gettin ready to start melting...er I mean modding my card and I'm putting the final plan together. So I'll keep an eye on this as whether to include this mod...
Wish I could just take the card down to the corner neighborhood Seattle v-mod store and have someone else do it...hehehehehehe
I'm not confident soldering such small stuff and don't want 3 smd grabbers hanging around...
C

Know what you mean Bro...that's why I jumped all over DDTUNGs 9700 in the classifieds. Mod will be done by the Master himself! Timing was perfect as I was just about to order a new one and hack it to pieces myself.

[muzz]

This particualer mod is not really that difficult if you are reasonably good with a soldering iron, have the right tip( I use a flat-some use pointed), and use good solder( I use multicore 21swg- have used thinner), and small diam wire ( I used solid for mine). Trick( not really a trick - just good practice) is to setup the wire by "Tinning" the wire first, then cleaning the tip and tinning that also. You will find if you keep the tip clean it will make things go alot easier.
The 8RDA vdimm mod is alot tougher than this one. I've looked at it, and am in no hurry to do it that way.
Good Luck guys.

muzz

[Xenogias]

Thanks to the excellent mod from DD I've successfully run out of room on the gpu slider for Rage3d Tweak(420.1mhz). i heard there is a reg tweak or patch of some sort to get 500+mhz on the slider. I know PStrip will do it, but I prefer Rage3d at the moment. Anyone have any info on this?

[student]

Which is the maximum applicable voltage is for vcore that for vmem before making damages?
Thx

[MrIcee]

Max Vmem should be around 2.95v:)

Randi:D

[student]

Originally posted by MrIcee
Max Vmem should be around 2.95v:)

Randi:D
:eek: :eek: :eek:

I have used vmem to 3.1v and vgpu to 1.85v!!! Is too much?
Only for bench...

[STEvil]

Good question.. People routinely drop 3.2 on their DDR in their system.. 8-)

I have to confess that the posted pics confused me more than anything.. 8-( The mem one I think I understand, but the vcore is not really clear..

[MrIcee]

Heres the Vcore

[WildKard]

Im really good with the soldering iron and do all my mods myself but excuse my ignorance...

Where exactly on the board is the Vmem chip located...I cant really tell by those pictures

Also, if i used a normal resistor what value would i need for 2.95v on the ram?

EDIT *bleh thats pure stupidity ill just use a VR....ignore me ;o*

[charlie]

My GPU Core mod is a bit different, I took a cermet 15 turn 10k VR and took the middle leg (wiper) and took it to ground (a solder pad that mounts one of the vga plugs) and the leg farthest from the adjust screw I took to the correct pin on the IC. My mod seems to work fine as I've had it up to 1.69v.
I figure my method is cool unless I run the card unmounted in the case, which may unground that solder pad.
C

[[H]AMDGamer]

hey where do you measure the Vmem and what resistance value should i use?

[Jesper]

Can you se the core volt and mem volt in a windows program like MBM? And I would like to see the temp also, is that possible?

[NUNEZ1980]

Originally posted by Jesper
Can you se the core volt and mem volt in a windows program like MBM? And I would like to see the temp also, is that possible?

no, tester needed;)

[STEvil]

Thats a V3 card, right, McIree? Dont wanna mess up my (9500-9700-9700PROPRO.. lol 8-)

EDIT

I think I will just do the xbit one, but using multiturn VR's and resistors so as not to kill something.. 8-) Looks about the same, anyways.

[SKATAN]

how´s the vmem mod on th pcb3 cards ?


:D

[m_kelder]

http://members.shaw.ca/matthewkelder/2regs.jpg
I will try to get a better picture, but that is my radeion 9700Pro. It looks like at rev3 except for that area where the voltage controller for the memory is but I have two of them there. Anyone have one like mine???

[STEvil]

Thats the exact same as mine.. has V38 stamped on backside. Frontside P/N says 30 (I think thats where you get PCB rev from?).

[m_kelder]

Same here, P/N 30 and V38 stamped on.

[STEvil]

Here, i'll throw mine up on the scanner.. hopefull it scans ok.

[STEvil]

Scan.. apparently I cant edit the post and add it.. 8-)

Hope this is good enough quality.. scanners arent exactly meant to scan things that are not flat.. though it works, lol 8-)

[Hobocrow]

I also have a 9500np > 9700 P/n: 109-94200-30. I think that the previous images of the memory regs by STEvil and m_kelder are the same as this card. The info ontop of the two (what I think are vmem regs) is: I5L6522CB and P240BKA. Below these are (4) post that may be where the mem voltage is measured. I guess i can't insert an image...I have one. :rolleyes:

[STEvil]

I got out a magnifying glass and did a new scan.. 8-)

Heres the info on whats on top of each of them. ".." means next line.

If you go to "submit reply" and look below the reply field, there is a section called "attach file"... you can use that for posting images.

[Hobocrow]

Originally posted by Hobocrow
I also have a 9500np > 9700 P/n: 109-94200-30. I think that the previous images of the memory regs by STEvil and m_kelder are the same as this card. The info ontop of the two (what I think are vmem regs) is: I5L6522CB and P240BKA. Below these are (4) post that may be where the mem voltage is measured. I guess i can't insert an image...I have one. :rolleyes:

Well I tried STEvil...............I think I don't have enought post to post an image!! :toast:

[STEvil]

er, sorry.. "post reply", not submit reply.. dont use the field at the bottom of the thread.

[Hobocrow]

STEvil, Yes, we have the same layout and chip sets. I can't attach any files, as there's no browse option available to me.

Anyway, I measured the voltage on the 4 pins that are below these two chipsets (regulators??). I believe that the pin are from the capacitors on the front side. I numbered the first row from left to right: 1, 2, and 3. Then below #3 is the last pin, so it's #4.

From a common Grd to #1 =7.5v, #2 =1.255v, #3 =7.5v, #4 =2.854v....Between #1 and #2 =1.248v, #3 and #4 =2.846v.

I'm hoping that this is the memory voltage that we're trying to increase and the correct place to measure it. :)

[STEvil]

This isnt there? Thats odd.

[Hobocrow]

Nope! Not there. :confused:

[Hobocrow]

Anyone want to host/post a digital image of the upper backside (behind the PSU connector) on a Sapphire 9500np Red PCB with the Infineon 3.3 memory?

I've reduced the PNG file and it's only 230k....It's pretty clear! :)

[STEvil]

email it to stevil_REMOVETHISBIT_@attcanada.net

I'll crunch it up as a jpg and post it.. dont need to be using killer high quality png's 8-)

[Hobocrow]

STEvil, the mail and attachment has been returned to me: Reason 550 invalid recipient. ? :confused:

[STEvil]

did you take out the "_REMOVETHIS_" bit?

[Hobocrow]

STEvil, No! hehe...Duh! :)
Ok, here goes....

[STEvil]

Heres hobo's didicam pic dealie 8-)

[Hobocrow]

Thanks STEvil :)

This is the backside of the card, behind the frontside PSU socket, on a Sapphire 9500np R30 card with Infineon 3.3 memory. Both of the 14 leg regulators are Intersil and I believe they control the vmem.

From a common Grd to #1 =7.5v, #2 =1.255v, #3 =7.5v and #4 =2.854volts

If I measure between #1 and #2 =1.248v and between #3 and #4 =2.846v.

#1 and #3 are negative and #2 and #4 are positive. We need some one to guide us in adding the proper resistance to the correct legs of one or both these regs, so we can increase the vmem. :)

Edit:// STEvil you did a great job on the pic/file! :)

[STEvil]

Im thinking it will be the same as the old mod, as the Rev3 cards had a second controller, too. It was just smaller is all.. what it controlls I dont know, though.. 8-)

[Hobocrow]

Originally posted by STEvil
Im thinking it will be the same as the old mod, as the Rev3 cards had a second controller, too. It was just smaller is all.. what it controlls I dont know, though.. 8-)

Maybe MrIcee would post a pic of his vmem on his Rev30 9700pro as a comparsion to our 9500np cards, as the pic he posted in this thread earlier (right upper side thin plate view) for the vcore mod looks exactly like my card in every detail...that might answer a question or two! :)

[m_kelder]

don't forget, mine is a 9700pro and it has the two regs instead of one..

[CATCH22ATPLAY]

Originally posted by STEvil
did you take out the "_REMOVETHIS_" bit?

LMFAO damn i'm sorry. But i just couldn't help myself. Hiya HoboCrow

[Hobocrow]

Originally posted by m_kelder
don't forget, mine is a 9700pro and it has the two regs instead of one..

Have you taken any measurements from those points so we can compare? Have you done a vmod? :)

Hiya back....Catch22:)

[STEvil]

I need more parts before I can do mine 8-/

The multiturn pots are too expensive.. $13 each here 8-(

[RotatingFan]

I'm very confused now. Let me get this straight.

Does this, 9700 vmod, also work on a 9500np(9700 pcb)?
Do i have to beware that there are several revisions on the market?
If so, wich revision is compatible with the 9700 vmod and wich revsion isnt.

[DisposableHero]

Originally posted by RotatingFan
I'm very confused now. Let me get this straight.

Does this, 9700 vmod, also work on a 9500np(9700 pcb)?
Do i have to beware that there are several revisions on the market?
If so, wich revision is compatible with the 9700 vmod and wich revsion isnt.

i just did it on mine... worked same as the 9700 mod

[Hobocrow]

Originally posted by DisposableHero
i just did it on mine... worked same as the 9700 mod

DisposableHero :) what exactly did you do to your card....did your card back look like the pic that STEvil posted ? Did you mod this area or the area near the plate like MrIcee's pic............ and is your sig before/after the mod? :)

[DisposableHero]

Originally posted by Hobocrow
DisposableHero :) what exactly did you do to your card....did your card back look like the pic that STEvil posted ? Did you mod this area or the area near the plate like MrIcee's pic............ and is your sig before/after the mod? :)


my sig is old :D sorry about that... just vmodded today...

i just did the 10k vr to the 18 pin on that chip under the heatspreader and then to ground

yeah like mr. icee

[DoGMaN]

Does the vmem mod still work the same way with the newer PCB revision of the 9700Pro as well?

Here is a pic of my new 9700Pro rev3.0.

[DoGMaN]

Here is the older version of the rev 3.0

[m_kelder]

has there been an update yet to what we have to do with these newer boards?

[Lagwagon]

Originally posted by m_kelder
has there been an update yet to what we have to do with these newer boards?



Anyone? There are now 2 IC's on the newer revisions

[youthemandan]

start testing the voltages with ur multimeter that should give u a good indication

[DisposableHero]

be careful what you touch with the multimeter.. i touched 2 pins that was posted was a place to test voltage and ended up sparking and shorting my motherboard killing it

[youthemandan]

What is the most Vmem i can give my new 9700 pro and not kill it. I plan on using ramsinks and i imagine the steam off the LN will cool them somewhat

[DisposableHero]

i think 3v was the max safe

[youthemandan]

Can i give my vgpu 2.0v and get away with that. It's gonna be LN2 cooled so cooling is not a problem

[bronco113]

Hi everybody,

I'm an italian guy (sorry for my bad english!) and I'm trying to do my first V-MOD on my Hercules 9700PRO.
I've already OC it to 420/720MHz, using it always @400/700MHz.
Now I'm doing the V-MOD, but I'm not so good to join this small component with the stain.. so I'd like to ask you all a little thing about it.

I've seen this "standard" mod (for the MEM V-MOD):

http://utenti.lycos.it/bronco113/V-MOD RAM.jpg

and this other one, made by the Italian guy Varenne (from HW, you know?):

http://utenti.lycos.it/bronco113/V-MOD RAM Varenne HW small.jpg

It seems that he has used different point for this operation, and it seems really easier for me!! :D Is it right, too? I've no problem for the ground (so many points to join it!!), but just for the other point, and by this ways I think I can solve my problem..

Thanks for all,

Luca

[zippyc]

You might want to consider using an SMD grabber instead of soldering (will not show visible evidence of mod. voiding warranty) and a 20-turn "Trimmer" type potentiometer will allow you to make very small voltage adjustments so IMHO is better for overclocking than a fixed resistor because it allows for finer adjustments of voltages than BIOS controls on your MB will.

I am not sure of the the contact points where they connected directly to the board, but the placement of the resistor on the legs of the IC looks correct.

[bronco113]

Thanks a lot zippyc,

tonight I've done my first "experiment" with this V-MOD, and I've used an SMD grabber like this one:

http://www.kanda.com/images/img029.jpg

with a normal resistor (just for trying, cause I didn't want to take my tester! :D), but I want to do this mod with "Trimmers" and SMD grabber, when it is possible...

THANKS A LOT AGAIN...

waiting for other answers.. :banana:

[bronco113]

..is "the contact points where they connected directly to the board", I don't want to TRY BY MYSELF with a 500€ board!! :slobber:

[zippyc]

and although I think I can solder ok, I sure feel more comfortable with somthing I can remove at will....

And (sarcasm here) it certainly has nothing to do with the fact that this card costs as much as a low-end computer!

[bronco113]

MY problem is the "INTERSIL ISL6522CB" for the MEM V-MOD (not just the other one for the VPU V-MOD) cause with this one I'm not able to use my SMD grabber.. there's not enough space!!!! :mad: :confused:

And so.. I'm trying different ways, like the one by "Varenne"...

[bronco113]

* MrIcee : can U help me? PLEASE... :(

THANKS for all,

you seems to be one of the BEST "MODDER" of the world..

[bowman1964]

guy's i know alot like to use the grabber instead of soldering,but i still solder and return mine no problem.
when i remove my soldered joint no one will tell i was there.
if you use Desoldering Braid to completely remove any traces of solder.grabbers are nice but i have problems sometimes with them making good contact.

[bronco113]

Originally posted by bronco113
MY problem is the "INTERSIL ISL6522CB" for the MEM V-MOD (not just the other one for the VPU V-MOD) cause with this one I'm not able to use my SMD grabber.. there's not enough space!!!! :mad: :confused:

And so.. I'm trying different ways, like the one by "Varenne"...

As I said.. THIS is my problem...

Can U help me? :toast:

[davewuk]

Not quite wanting to mod my card but repair it. The 'heatsink' over the (VPU?) voltage reg section of a 9700pro was loose and it looks like thermal runaway toasted at least one IC. Anybody able to furnish me with details of two of the four ICs, I know one is a 3037A and the other 4804, both of which look okay.

[DisposableHero]

Originally posted by bronco113
As I said.. THIS is my problem...

Can U help me? :toast:

find out which one is ground then u dont need to use a grabber for that one.. just put that one the the case or ground wire on molex...

[BLHealthy4life]

I REALLY REALLY want to see the 9700 volt mod posted by Mricee. I click the link and it says that I can't access the file directly or something like that. anyone having the same problem? I really want to over clock my card and NEED this guide. If the link is invalid, can someone send me the guide somehow please. Thanks!

[Walrusbonzo]

Does anyone know what the original resistance values are for the VCore and VDD?

I'm trying to work out what resistor to use for these mods.

I have 2.7k, 3k, 10k, 12k and 15k resistors at my disposal.

What do you think I should use for VCore and VMem baring in mind I'm using stock HSF for VCore but I removed the shim, I'm using shin etsu paste and I have lots of air cooling in the case. I also have ramsinks on all the RAM.

Thanks ;)

[`schr0et]

Hey all, new member here. I must say you guys got me hooked on this site, been reading it for the past 2 hours lol! I just read thru a plethora of pages regarding the vmod for the R300 core, haven't read anything about the vdd mod tho. I wouldn't mind soldering but I would prefer trying with the SMD grabber first. I notice that this is quite an old method but I would appreciate any tips at all.

[`schr0et]

Oh BTW I have a Built by Radeon 9500 Pro with 3,3 Inf memory currently playing games with it at 331/311.

[Goldlocke]

@ moderators: the link to MrIcee's voltmod guide is broken. It links to an empty Xtremesys-page.

[Crozet]

Can you please fix the link.It is broken!
thx

[DisposableHero]

this may help

http://thecrucible.ca/forums/viewtopic.php?t=83

[guismarquesrj]

why it's not possible to use grabbers modding the 9700pro?! don't have enought space?!

[NUNEZ1980]

Originally posted by guismarquesrj
why it's not possible to use grabbers modding the 9700pro?! don't have enought space?!

who said that, you on crack? :D


http://www.extremeoverclocking.com/articles/guides/images/radeon9700vmod_10.jpg

[DBurton]

My card looks like this:

http://thecrucible.ca/images/old_mem.jpg

Can anyone confirm that this the vmod in this picture is correct? Also, is there a list anywhere of the different levels of resistance and the resulting voltage of them? I would prefer to use fixed resistors :) .

DBurton

[Horizontal Dave]

Yup that's the correct points.

Whilst my 9700pro was still alive
:frag:
I played around a bit and found that from a stock voltage of 2.9v for Vmem, a 6,800ohm resistor would give me 3.1v and a 2,700ohm resitor would give me 3.2v.

For Vref from a stock voltage of 1.4v, a 39,000ohm give 1.41v, 27,000ohm 1.42v and 22,000ohm 1.43v

I wouldn't try the Vddq, tried it a couple of times, never with any success, the second time was fatal.

[CATCH22ATPLAY]

The problem i've noticed with raising VDDQ is an increase in heat for the gpu. I checked it and VDDQ does actually go into the gpu itself. So i can understand why there is an increase in heat. So some people aren't having much sucess raising VDDQ. Take care of the heat and VDDQ may work better for you. Then again maybe not. Just gotta play with it and find a happy setting for all the mods. Damn this info below is old.

[CATCH22ATPLAY]

Originally posted by DBurton
My card looks like this:

http://thecrucible.ca/images/old_mem.jpg

Can anyone confirm that this the vmod in this picture is correct? Also, is there a list anywhere of the different levels of resistance and the resulting voltage of them? I would prefer to use fixed resistors :) .

DBurton

Yup that's correct.

BTW i have no problems using a mini grabber on the ISL6522 chip. But mine are a lot smaller than the ones you guys are using.

[Nomjr]

Originally posted by CATCH22ATPLAY

BTW i have no problems using a mini grabber on the ISL6522 chip. But mine are a lot smaller than the ones you guys are using.

Smaller than the mini ones at frys CATCH?

[CATCH22ATPLAY]

Originally posted by Nomjr
Smaller than the mini ones at frys CATCH?

Nope not smaller than that. Those are the ones i use. I put a 135 degree bend on em. I hope we're talking about the extra extra small ones here. Damned expensive imo but well worth it. Sometimes the fit is a bit tight. But they jam in after a little bit of coersion. :cool:

[Nomjr]

Yeah the mini expensive ones:eek: Amazing they get that much for them, more than the larger ones in fact:slobber: Thanks CATCH!

[CATCH22ATPLAY]

Nomjr, Ah another SoCal dude. SanDiego area myself. To be more precise Vista. But grew up in Escondido. Seems to be quite a few of us SoCal dudes around modding comp stuff and following theese threads. Tried that dryice and my R9800@580/420. It was looking sweet until cpu freaked out on me. ARG!!! I give up for now. I think i'll improve upon my volt mods and see if i can get 600 core.

BTW after experimenting a bit here's the math i've come up with for Vref voltage. I got no idea why it has to be this way. But it's very consistant with my cards. First we know according to data sheets Vref must be 1/2 of VDDQ. But that isn't good enough. We always had to play with it to get it working correctly. Here's what i came up with. Raise your VDDQ to whatever you like. I suggest 2.80 to start. Now divide by 2=1.40 volts. Now here's the trick. Add 0.075 minimum to 0.10 maximum to it. So set Vref to between 1.475 to 1.500. Use the same math for 2.825 aka set Vref from 1.4875 to 1.5125. For 2.85 set Vref to 1.500 to 1.525. Personally what works best for me is dividing VDDQ by 2 then adding 0.080 to 0.085. I never set Vref above 1.510 btw. I've had a few problems trying above 1.510. Anyways i hope the math helps someone. My apologies for never writing all this down way back when i first starting making volt mods and threads about this Vref thing aka R8500 days. I hope it helps someone now. Good luck dudes :)

[Nomjr]

Yup CATCH, from Los Angeles now but grew up in Chula Vista/ National City area. Miss San Diego alot, great great weather. And yes, I try to keep up with "your" threads when it comes to v-moddin cards;) I just ordered a 9800pro that should be here like early next week. Going to do the gpu vmod first and see how far that goes. What should I be shooting for as far as core and at what voltage? I'm on chilled water btw.

My 9700pro does 425 so far at 1.6v. Adding more volts doesn't seem to get me any higher. Can't touch the mem for some reason, anything over stock and I get lockups, might be a volt thing eh?

[NUNEZ1980]

Originally posted by Nomjr
Yup CATCH, from Los Angeles now but grew up in Chula Vista/ National City area. Miss San Diego alot, great great weather. And yes, I try to keep up with "your" threads when it comes to v-moddin cards;) I just ordered a 9800pro that should be here like early next week. Going to do the gpu vmod first and see how far that goes. What should I be shooting for as far as core and at what voltage? I'm on chilled water btw.

My 9700pro does 425 so far at 1.6v. Adding more volts doesn't seem to get me any higher. Can't touch the mem for some reason, anything over stock and I get lockups, might be a volt thing eh?

well, what system you have, spec?, amd or p4?, psu ?

on an amd system 2400+, a7n8x, 8rda, 2*wd 80g, 2*cd-rom, r9700,

I try three different psu supplys enermax 350w, sparkle 400w, antec 425w and they are gave me different overclock, I setle for the sparkle 400w because I could adjust the voltage, I found about this when I was overclocking and with a cheap pci video card, I could get nice overclocks, but as soon as a put the r9700 in the system my system memory whould give me errors :(,

If I up the voltage on the gpu, the memory would perform worst and worst,

what to do

put your system stock, take the mod off of the gpu and work just with the memory, when you get the highest overclock possible, work with the gpu and if the memory performs less than before a new psu will be needed:eek:

good luck, and also something to consider, will the extra money on the psu will be worth the extra overclock?


on the r9800 start with the memory first, and work from then, with chilled water and some voltage + some luck, you will be able to hit 450-500/350-400, but its all about luck, and I wish you some:toast:

[CATCH22ATPLAY]

Originally posted by Nomjr
Yup CATCH, from Los Angeles now but grew up in Chula Vista/ National City area. Miss San Diego alot, great great weather. And yes, I try to keep up with "your" threads when it comes to v-moddin cards;) I just ordered a 9800pro that should be here like early next week. Going to do the gpu vmod first and see how far that goes. What should I be shooting for as far as core and at what voltage? I'm on chilled water btw.

My 9700pro does 425 so far at 1.6v. Adding more volts doesn't seem to get me any higher. Can't touch the mem for some reason, anything over stock and I get lockups, might be a volt thing eh?

That's hard to say. Since i've had about 5 or 6 of theese R9800's now i've found stock volts to be quite a bit different. The lower core voltage ones aka 1.60 volts O/Ced the highest after volt modding em compared to the 1.70+ default ones. For the ddr i'm doing about the same as i was with my R9700. Although changing VDDQ doesn't help it seems either raising it or lowering it. Raising Vref helps a bit to get rid of the artifacts like black tree limbs in nature 3dmark2k1se etc. raising VDD up to 3.6v does help. Although i've only done that a few times. Highest i can run core is 2.025 volts with below zero cooling. 1.925 for WB with say 10C water or so. Each of my cards seemed to run the same voltage wise.

But to answer your question more directly you need to get a card that does 450-470 completely stock aka right out of the box. My first 3 R9800's couldn't even beat my R9700 core O/C and that was after volt and cooling mods. So i say if it doesn't do that return it and get your money back. Then e-mail me and i'll sell you one of mine that'll do 460 stock :) 82F ambient conditions btw for my stock tests.

[Stang_Man]

I have a 9700pro doing a max of 411 now in Dragothic, at 1.7v, cooled by a retail amd heatsink.

my volts are as follows:

1.7 vgpu, 2.86 vddq, 1.46 vref, and 3.15vdd

should i raise my vref to 1.5 to work with your equation Catch? and what Ohm resistor should i use?

also, what's a max voltage for memory? 3.5v?

[CATCH22ATPLAY]

Strang_Man i find it's easiest running Nature in 3dmark2k1se for testing core and mem. If you see white dots in Nature you need to increase VDD. If you get what look like logs or trees on the screen you have to either lower or raise VDDQ and or Vref. If you get checkerboard pattern it's Vref way to damn low. Core can also cause trees as well. So test mem with your core set 40mhz below max you can run it. I can't remember what resistance i use because i use a vario resistor for all my mods. I normally use 5k ohm and 10k ohm varios. My math for Vref works for me. But like always each card is a bit different. Remember it's not just the volts you have to factor in. V(volts) X I(current) = watts for DC. It's total watts not being the same for all of theese cards even if we set our voltages the same that makes all our cards different. I aka current is what's really messing up our equation. I can usually get higher current because i set my 12v and 5v and 3.3 rails quite high. Plus i have a $325.00 PSU. I also run wires directly from my psu to my vid card. I also do from 5 to 8 volt mods to a card. My R9700 before i killed it checking voltages for someone at another forum was doing 420 mem. That card had about 10 volt mods on it and looked like it could never run period. But damn it was sweet. For a card that only could do 346 mem when i first got it i was pissed at first. 4 months later after so many mods it rocked!

Here's some tested volts for VDDQ and Vref that worked perfect for me at least. BTW VDD was set at 3.4 and core at 1.830.
2.75/1.45
2.775/1.46
2.80/1.48
2.825/1.50

Doesn't seem to work on the R9800. But for the R9700 it does. If i were you i'd lower VDDQ to 2.825 and raise Vref to 1.50 and raise VDD to say 3.225 or so. See what that gets you and good luck :)

[Stang_Man]

thanks for the response!

you use 10k ohm vr on vref and vddq? i cannot find anything higher around here..

[G H Z]

I'm using a 10k vr on my vref(Sapphire9500 Inf3.3), and at it's max ohm setting of 9.57 it gave a vref voltage of 1.309v. Up from the factory 1.255v. Vref has done nothing for the memory overclock, and caused artifacts(colored) above 1.365. Max tested VDD is 3.32v. Getting a little too toasty.

So it seem's VDDQ is not doing anything either per Catch? I though VDDQ was memory related, btu Catch say's it goes to the core.

EDIT: OK, Verf does work. Just took some time to work it all out. 330mhz stable now;)

G H Z

[Stang_Man]

quick question as i'll be doing vref and vddq this weekend... is having vref or vddq too low "bad for the card??"

cause i'd like to start low, and go higher finding what i need..

[G H Z]

No it's not. In fact many people never do those mod's at all. They are pretty much reserved for those looking to grab the absolute highest clock's.

G H Z

[CATCH22ATPLAY]

I'd have to disagree with you there. The whole reason i started doing the Vref mod was because of that R8500 with 128mb Infineon ddr. Quite a few people i know fried thier cards. Some when they O/Ced em and some running at stock. I was O/Cing mine and it would completely freak out and the only way to get a clean screen was to reboot. All it took was 2 to 5 minutes running the card with the freaked out screen to fry it. Well i wanted to fix this bad engineering by ATI. So i found the the problem. Vref was too low. ATI i bet had thousands of those R8500's returned just because of that Vref issue. Now i try to use it on all my cards and mobo as well. Sometimes it doesn't help. Sometimes it saves the card :)

[Stang_Man]

Catch, what voltage do you think i should begin testing my vref and vddq's at??


right now, i can do 459/351 with 1.8v on gpu and 3.14v on memory with a swiftech mcw50-t

[CATCH22ATPLAY]

Originally posted by Stang_Man
Catch, what voltage do you think i should begin testing my vref and vddq's at??


right now, i can do 459/351 with 1.8v on gpu and 3.14v on memory with a swiftech mcw50-t

I believe i answered that about 4 replies ago. Just use my math in that reply. Out of almost 10 cards my math worked perfect for all of em. If you use the math you won't fry the card. However if you don't follow the math you might. As in the case with the R8500 ie Vref too low. But Vref too high is just as bad. Then again there is a lot more to it then just getting the volts correct. Since thier resistors and jfets and capacitors and inductors and damn near every part is + or - 5 to 10% your ddr may not go over 365 period. I've had a couple cards that even with volt mods just wouldn't do jack. It's still hit and miss. I got lucky with all my R9700's. But the first 4 or 5 R9800's i got couldn't get close to my R9700 O/C even after modding em.

BTW i've never fried a card from volt mods and that's running ddr at up to 4.2 volts. I fried a R8500 once. But like i said ATI was to blame there and i fixed it for future R8500's. I also fried a R9700 testing voltages live. Damn my shaky fingers and too much coffee. Hmm burned up a 3dfxV4500 because heatsink fell off the core. Out of say 40 vid cards i've owned and i've volt modded all of em those were the only ones that died. I make sure to cool off the core and check the ram and add ramsinks if needed. I usually run my voltages or at least try it at way higher volts than almost anyone has balls to try. 2.25 for core doesn't work too well on a R9800 btw :)

You got a great core o/c btw dude. Your card is smacking some R9800 arse. Try volt modding that ddr and wtf happens. You may get lucky. I didn't mean to confuse anyone when i said vddq goes to core. From what i can determine the R350 core uses 3 different voltages. Main core voltage ie Vcore (the one we mod) and what looks to be a secondary core voltage of what i mod to run at 1.80. That's a completely different mod and i don't think anyone does that except me. If it proved beneficial i'd try explaining it and showing what it does like i did for Vref. But i think i found a sweet spot and i keep it there. As you can tell i mod everything if it needs it or not. Here's where it gets tricky. WHat's wierd is if you check voltages around the core you find Vcore and that seondary core voltage and vddq. All i meant by saying vddq goes to core is that communication from the ddr to the core is via vddq. I'd have to read more about communication between components to figure this out exactly. If someones got a good answer i'm all ears and always eager to learn every second of every day. :) I already know or at least think i know what the secondary voltages on a P4 and P3 are AGTL and AGTL+. Gotta read up on SSTL and SSTL2 for sdr and ddr now. So many different ways to communicate i'm a bit confused atm.

Oops rambling a bit. One too many beers maybe. hehe