Nvidia 8800GTS Vmods

EVGA 8800GTS

Vddr - 1.95V :eek:
Vgpu - 1.30V idle - stress 1.28V

Regards

Martin

Ok some update from me ;)

Vga with water and done vgpu with 1k VR Start testing for max vgpu and hmm not bad 1.55V is ok. More V = kick from OVP :p:

Already hit 620FPS in nature 01 with clocks 675/999MHz and cpu @ 3850MHz

Temp not good 65C stress :mad:

http://images11.fotosik.pl/2/546981edf51aacbcm.jpg


Tune down voltage and back testing ;)

Regards

Martin

Twintech 8800 GTS : 820/1204Mhz
Cooling : DOD R507
Vmod : Vgpu = 1.56v , Vddr = 2.3v

http://www.membres.lycos.fr/boblemag...0GTS%20bob.jpg

http://www.membres.lycos.fr/boblemag...39;s%20fix.jpg

Quote:

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Originally Posted by boblemagnifique

Twintech 8800 GTS : 820/1204Mhz
Cooling : DOD R507
Vmod : Vgpu = 1.56v , Vddr = 2.3v


REMOVED THE PICS

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So is the mem 1408MHz or 1204MHz?

Where did you get 1408 from?

Quote:

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Originally Posted by nicepun

So is the mem 1408MHz or 1204MHz?

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602MHz * 2 = 1204MHz :p:

:toast:

Regards

Martin

XFX 8800GTS
1.82 - 1.27 idle/ 1.24 load

Quote:

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Originally Posted by Jochenp

Where did you get 1408 from?

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Oops, I meant 2408Mhz.....:slap: :slapass:

hi,

what is safe GPU & DDR voltage for 24/7 use? (8800GTS @ EK Waterblock)

Thanks
Chris

I'm using 1.35V idle (1.31V load) 24/7. Card is watercooled.
I think that totally safe values are ~1.35Vgpu and ~1.95V to memory.

Of course you can use higher volts, but there is no way to estimate is it safe.

Any new ideas on the "wall" at 700MHz core? Is it temperature related, or is there more to it than that? My card is loading at 36-38 degrees and I think I should be able to do better than 685-690Core.

My VCore reading is still weird...DMM(s) measure VDDR accurately, and probes show that my core Vmod works so i`m in the right place, but still reads about 0.1V higher than everyone else...weird.

Yesterday i was finally able to fire up my modded 8800gts.

default:
1.26VGPU (load)
1.90Vmem (load)

648/1000 max. stable for 24/7 gaming

modded:
1.40VGPU
2.02Vmem

720/1035 max. 24/7 stable =)

mem oc improved only a little bit but its fine, i can go even higher for benches and still raise vmem a little.

raiden

Stock:

idle 1,305 V
load 1,285 V
RAM 1,905 V

€: its a Sparkle GTS

I have tryed the mod but it dont works, I must try it another time

Quote:

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Originally Posted by K404

Any new ideas on the "wall" at 700MHz core? Is it temperature related, or is there more to it than that? My card is loading at 36-38 degrees and I think I should be able to do better than 685-690Core.

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I will test my GTS with dry ice soon. So then we will know is it only temperature related problem.

I`ve got it up to 710, 1.42V* load (keeping in mind it jumps) it might have been a voltage thing on my part. I screwed up pot contact when I tried dice benching it LOL hope your runs go much better!


*what my DMM says...might actually be 1.32-1.36V?

What kind of gpu temperature did you got with dry ice? (with bad contact)

My lowest temp has been with chilled water (17 celsius idle ~25 load)

ROFL 0 to +15 degrees...when I say bad I really mean ******* awful :D

Under the chiller i`m loading at 34-36 degrees. I can take it lower, but none of my gears insulated at the mo.

Your major HWBot competition wont be coming from me at the mo, put it that way ;)


EDIT: pushed a bit harder and can bench 3D03 at 735MHz core, at 36 ish degrees with my DMM showing 1.52V load....that might be 1.42-.146V compared to everyone elses, which seems more in line?

Users with 320MB versions of GTS, please post idle/load voltages here and tell us how Vmod's are working. Thanks!

will do,they just came forsale yesterday in states .getting two and i will help you help me. thursday they will be here.
thanks for all the info

Quote:

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Originally Posted by K404

Another point... a 5K resistor for the GDDR puts the RAM to 2.04V, so to play safe, i`d recommend 10 or 20K instead :)

Still to try VCore, hoping for more details on black screens at 1.43VCore...core MHz too high, or some protection feature kicking in :)

Kenny

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5k also put me a bit over 2v, and I know for certain my dmm is not off. EVGA card.

evga sc gts 320
idle 1.297
load 1.249?
ddr 1.893
now after mod so far

idle 1.469
load 1.424
vcore 715 o5 bench staible

I am considering doing these two mods as im going to watercool my 8800GTS very soon.

I havent tried vmodding before and there is something i dont understand.

When i compare the pics of the mod done on your card and the picture of how to do the mod then the wires are not soldered to the same places, Why is that?


Where excactly do i solder the wires to?

http://www.xtremesystems.org/forums/...5&d=1163536672

http://www.xtremesystems.org/forums/...2&d=1163535430

And another question. I know it might a stupid one :D

When it says connect to Ground is that to the black PSU wires or somewhere on the GFX pcb?

Thanks

-Lasse

You can use the red point or blank spot on the left. Good point to ground vr is in upper picture.

Thanks alot

http://service.futuremark.com/compare?3dm06=1576721

http://service.futuremark.com/compare?3dm05=2858874

http://i7.tinypic.com/2mo9e9c.jpg
http://img522.imageshack.us/img522/979/8800gts2yy4.jpg


4% increment VGU = @ 670/2000Mhz @ 1.32V vs 1.26V stock (630/2000Mhz) both 1350Mhz Vertex @ GTX

Use 1k Trimmer or even 500R for better precision (but 500 starts in 1.38v idle/ 1.32v Full)