8800 GTX Volt Mod? NP!!!!

[Dawgdoc]

Woot!!!

Never touched a soldering iron before tonight., and after a few hours practicing I SUCCESSFULY voltmodded my 8800 GTX!!!

Did the Vgpu soldering a 1k OhmVR as per all of the guides. Trimmer works without a hitch

Did the Vmem mod with the pencil. I did not have a 20k ohm VR and that looks like a damn hard bit of soldering. With the pencil Im fairly certain I overdid it, and will need to alcohol some off and start over. Vmem sitting at approx 2.45V.

Unfortunately, my EVO 2.4 pot and Tek-9 GPU pot (first pots and first DICE/LN2 for me too coming up soon!!!!!!) are still in the ordering stage, and Im running a stock cooler on my EVGA 8800 GTX, and even with an extra fan leanin on it, I dont think I can SAFELY get much more out of it (running 24/7 at 660/1050/1680).

Sorry for the cruddy pics. I never claimed to be much of a photographer :P

DMM pics are 2.45ish Vmem, 1.45 Vgpu, and finally 1.55ish Vgpu (cranked it a tad for a few moments Stock is 1.35 Vgpu and 1.90 Vmem.

Woohooo Im SO stoked I dont think I am going to be able to wait the few weeks for my pots and my dewar now!

[Dawgdoc]

Bah, those bottom 2 were scrap pics that werent supposed to be posted. Sorry

[Dawgdoc]

Actually, in retrospect it was quite easy.......

Soldering to the SMDs was cake. Obviously the VR was simple......only problem I had (and it WAS a problem...i was getting VERY VERY worried) was that nasty little SOB resistor for the Vgpu that ppl have broken off in the past....

How high can I get without OVP mod? Is the OVP mod significantly more difficult than what I have allready done?

Wooohoo!::up:

[AliG]

here's the mod
http://www.xtremesystems.org/forums/showthread.php?t=162124&highlight=hipro5+ovp+mod

I don't have the money myself to down on an 8800gtx so I would recommend not doing it unless you are confident on your soldering skills, then again you just modded it once already

just wondering, how difficult is it to mod your gpu? I'm about to buy a 3870 and am considering to mod it

[Timbosan]

just wondering, how difficult is it to mod your gpu? I'm about to buy a 3870 and am considering to mod it

its not hard really, but practice on an old motherboard first, makes it so much easier.
make sure you use a small (<25 watt) soldering iron, nice fine gauge solder and flux can help get things to stick.
read volt mod & soldering guides too, they are really helpful.

[Dawgdoc]

It was alot easier than I thought it was going to be.

And as I said, I picked up the solder for the 1st time in my life the very night I did the mod LOL......

Just ask Timbosan. Just about 1 week ago I was PMing him asking for advice on how to use a solder......what a DMM was.......I had NO idea what ANYTHING was or how to use it so....

Im sure every GPU volt mod is different with respect to how difficult it is, but I modded 2 cards (this 8800 GTX, and a test run on a radeon 1650 pro just prior to the 8800) on my first night, both 100% successful.

Cant be THAT hard considering all that info :)

Practice with that solder until you feel confident. I must say though, I HAVE been reading for hours each day about volt-modding GPUs, soldering, electrical basics, etc for the past 1 week before ever even picking up a soldering iron.

[Fujimitsu]

Glad to see you got this done, nice and clean fantastic job for a first time.

[Dawgdoc]

Glad to see you got this done, nice and clean fantastic job for a first time.

TY :)

Im still so VERY excited!

Do you really think it is a neat and clean job? I did my best, but as I said, I never picked up a soldering iron before that very same day I did the mod :)

[Cpt.Planet]

your vram voltage is pretty high. Never had to run more than 2.2 through mine

[AliG]

it does look nice, you have inspired me into vmodding my 3870, but of course, I will be practicing with some dead hardware then my 6600gt (want to see how much of a difference a vmod can make) first

[Dawgdoc]

your vram voltage is pretty high. Never had to run more than 2.2 through mine

Yea, I thought it was VERY high, esp for just air cooling. Im gonna prob redo the pencil this evening, and order a 20K VR 25 turn to hardmod it in the near future.

Would a 10K ohm 15 turn VR work for the Vmem hardmod? I see all forums and pictures call for a 20K ohm, but I dont have one of those.....

[Timbosan]

it depends on what your default voltage & resistance is. I had 1.87v stock, and by soldering on the 20K adjusted to 20K, i got 1.92v, so thats the lowest i can go now. Because you have 2.2v stock id use the 20k.
BTW good work learning all that and doing it successfully, it takes a decent size set of balls :up:

[dengyong]

2.1v is all you need on the memory. 2.45v will kill it pretty quick. :2cents:

[Timbosan]

2.1v is all you need on the memory. 2.45v will kill it pretty quick. :2cents:

this isnt DDR2, to my knowledge no one knows what will kill GTX/GTS ram. EVGA GTX SC version has 2.2v stock, so that has to be safe one would assume. 2.2v+ is a grey area, not necessarily dangerous but not known to be safe.

[Kunaak]

your gonna kill that card at 2.45.

with mine, setting above 2.15 over long periods of time, results in graphics corruption.
for me, I just settled on 2.05 for daily use, up from 1.95.
that was the sweet spot for not overheating on air.

at 2.45 your pretty much garaunteed to burn up that card.

[Dawgdoc]

Yea, I figured it was quite high.

Tough to fine tune things with a pencil :P

I havnt run it since the night I modded it for fear of the voltages damaging it.

Im ordering a 20K VR 25 turn and will hardwire ithe Vmem mod when it arrives. IF I do use that card again prior to the hardwire or the pots/dewar arriving, Im going to run it at full stock.

[emoners]

man i wish i had the guts :D

[Dawgdoc]

man i wish i had the guts :D

I dont wanna push you into something you dont personally feel ready for but.......

Its not as tough as you think. PRACTICE on crap and try to solder the smallest dang resistors/SMDs/whatever you can find on garbage GPUs/Mobos.

Do your whole setup first......Solder the wires to the VR. Heatshrink/glue/whatever you need/want to. Cut your wires to length. Get your molex all set. 2ble and triple check your solder points. Set it all up on the GPU and rethink everything and then.....

If you feel up to it. Go for it.

Once again BE CAREFUL WITH THE VGPU SOLDER POINT!! That is the only place where its difficult. Grounds are all over and easy. The super huge SMDs for measuring were a cakewalk. That dang Vgpu measure point resistor is a HUGE HUGE PITA if you damage it so do it carefully.

If I can do this, anyone can do it.