8800GT voltage mods

[georgesod]

So VETDRMS can you show us some pictures of the mod? What's the right way to do it? Also what vr did you use for vgpu and vmem?

[VETDRMS]

So VETDRMS can you show us some pictures of the mod? What's the right way to do it? Also what vr did you use for vgpu and vmem?

Sure. I would normally not use the Radioshack VR but I had none around that were low enough.

I used 50K on the vmem as my card came with stock VDD of 1.95 and a 20K bumped that up to 2.056 right away. The 1K on the vGPU is only a 15 turn but the vGPU increments are still fine. It would look better if I had the Bourns type. Oh well.

[metro.cl]

Sure. I would normally not use the Radioshack VR but I had none around that were low enough.

I used 50K on the vmem as my card came with stock VDD of 1.95 and a 20K bumped that up to 2.056 right away. The 1K on the vGPU is only a 15 turn but the vGPU increments are still fine. It would look better if I had the Bourns type. Oh well.

That vmod looks a lot easier i might try it i only need to get the 1k VR

Your Vram doesnt seem to overclock over 1000mhz is that right? i can bench at 1040mhz stock volts

[VETDRMS]

That vmod looks a lot easier i might try it i only need to get the 1k VR

Your Vram doesnt seem to overclock over 1000mhz is that right? i can bench at 1040mhz stock volts

Yes, it craps out at 1026mhz, even at 2.025v.

[VETDRMS]

Man, this memory sucks. I loosened the timings to Qimonda spec (the stock bios is closer to Samsung 1ns spec - come on partners, put Samsung in the board). And even at 2.075v Mem it craps out real fast at 1044mhz.

That being said I seem to have hit a new problem. The core will not clock over 864mhz. No matter how high I go in the overclock setting in RivaTuner the ROP clock stays at 864mhz.

Anyone else been this high?

[VETDRMS]

Well, the shader seems to like the extra voltage. 2052mhz shader is 100% stable, while the core seems mostly stable at 864mhz. As I mentioned before I can't go any higher with Rivatuner, it will not change ROP over 864mhz.

Shader will run for a while at 2104mhz, but will artifact after a minute or so.

I'm pretty impressed, at 1.315v its rocking!

[uwackme]

Proper soldering iron would be Weller EC3001 or equivalent.

Source in US for parts... pots, etc is Digikey.

Go to Radioshack and get some KYNAR 30ga rework wire. Use it for these things. Makes for much cleaner work, and easier to work with SMD. Also, look into getting a nice magnifying ringlight, makes it alot easier to work on tiny SMD stuff.

[theteamaqua]

nice, but i intend to keep my warranty, therefore no vmod...

unless there is a pencil vmod , which is irreversible

[VETDRMS]

GoldenTiger:

I don't think 1.175 or 1.200v would be a problem, those are some decent heatsinks. My stock SSC was 1.137 on the single slot cooler.

Unless you like the smell of roasted mosfet I would advice you install some sinks on them. They do get pretty hot and when you up the voltage they will get much hotter. The copper sinks on my mosfets get up to around 122F.

So, what kind of clocks are you getting???

[dinos22]

no point touching RAM so maybe back down in case you kill it

goes out to finder a soldering iron and 1K VR

what do you guys suggest in terms of soldering irons

i want 1GHz core : and some dice is that too much to ask

[VETDRMS]

Hey, the next step from 864mhz for setting the ROP clock is 918mhz. No go there, instant hard lock. LOL

I am having some memory problems at the moment.

With the high ROP/Shader clock it will artifact at 1000mhz. At 900mhz memory its rocks table. Ran loops of 3DMark at 864/2106mhz at 1.281v with no problem.

If your going to drop some dry/ice LN2 on it, I think 1ghz won't be a problem at all.

Shader will go as high as 2160 mhz now, but will artifact a bit.

Also, Nibitor is reporting some strange memory timings when I try to make changes and flash the bios. The settings don't get set right or Nibitor isn't readin them right, just FYI.