8RDA/+ chipset mod?

**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.

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

**RichBa5tard** · 01-01-2003, 04:05 PM

Yey! It works perfectly!

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.

**divine** · 01-01-2003, 04:42 PM

Please some guy can especify all i need to mod my VDD and whatÂ´s pins

**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 ...

**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!!!

What are your timings at that run? Looks like they are a bit relaxed, no? At any rate, 231 is NICE!

**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 some guy can especify all i need to mod my VDD and whatÂ´s pins

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

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

**Clocker** · 01-02-2003, 07:43 AM

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

http://www.xtremesystems.org/forums/...&threadid=1152

Sorry for being a noob. :-)

C

**Jeff** · 01-02-2003, 07:51 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!!!

Nice picture Arz.

But you should change the text to read Pin1(Fb) and Pin4(ground).

**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

**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

N8 · 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

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

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:

memory bench and super pi 1MO
http://membres.lycos.fr/ftpad/images...ecd%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!!! What are your timings at that run? Looks like they are a bit relaxed, no? At any rate, 231 is NICE!

Yeah, pretty relaxed timinmgs.
2.5-4-4-7.
IÂ´d never though it could be pushed this far at all.
IÂ´ll put in my other memory later and see what they can do.

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