6800GT Volt Mod?

[geid3811]

So I am planning on flashing my eVGA 6800GT with a modded bios. My original bios (got using Nvflash) says 3D 1.3V, 2D 1.1V. I am planning on upping my 3D to 1.4V but should I up my 2D to 1.3V or leave at 1.1V. I haven't heard of anybody upping their 2D voltage but I would think both 2D and 3D would need to be increased to jack up performance.

 

[Milkman]

I just reflashed mine and used my original file slightly modded for 1.4v 3d and core @ 400, memory @ 1120, when using auto it was giving me a best core overclock of 385, now it gives me 425 and runs perfect at those speeds with the factory cooling( For now )

-Milkman

 

[geid3811]

Cool. I'll give the 1.4v 3D mod a try.

 

[geid3811]

So I successfully flashed my card. At stock bios I ran the card at 433/1.2 stable so I set my core to 425MHz and my ram to 1.1GHz (Ultra speeds) and upped my 3d voltage to 1.4v. This only allowed me to get a max speed of 451/1.2 and I did get some artifacting not to mention about 5C temp jump. I reflashed the card back down to 1.3v with the core and ram at ultra speeds and will probably just leave it there.

 

[CandymanCan]

Oh ok so let me get this righ it only let you overclocked more from 433/1.2 to 451/1.2. Hmm lol

Thats a pretty big increase, but yea if youre ganan run @ Ultra speeds 400/1.1 then thier is no need for the 1.4v bios.

 

[geid3811]

The increase in speed didn't show on 3DMark05 or in games so I just figured I keep the stock voltage and lower speeds.

 

[Dukemurmur]

How could it not show?!?! that normally mean that you have reached your core limit...when that happens better cooling or nothing seems to help....at least that is what i have found...there just seems to a window like that...

 

[Dragonprince]

Throttling issue ? Sounds like it might have been running too hot, I though anything over 425 was H20 territory....

 

[geid3811]

Throttling issue ? Sounds like it might have been running too hot, I though anything over 425 was H20 territory....

When running with the 1.4v mod it got to 68C during the 3DMark05 test, which is higher then I would like. I am looking at watercooling sometime in the near future so once that project is done I'll reflash and give you an update.