8800GT voltage mods

[JKDC]

Has anyone tried to increase vgpu through bios mod. I increased the stock bios' 3D voltage with Nibitor to 1,22v and flashed it back to my card. It appears to be working as I get far more stable core clocks over 700MHz and up to 800MHz. I guess the voltage increase is small (I didn't have the time to measure it with a DMM) but is probably not even close to the set value. When I'll get home I'll measure it so not to speak hypothetically.

I can confirm that this is working. I tried 1.25 and 1.3 but got the same results. I now set it to 1.2 volts and have the same OC. I imagine this only goes to 1.15 on the card. My OC went from 702/1722 to 756/1836. I set the lowest voltages to 1.1 and the two highest to 1.2. You have to edit the voltages before they show in the table. My temps went up 2C idle and 3C load with a thermalright V2 cooler. With stock cooling you better have the fan speed up to 50%+ before trying this.

It's still not enough to stop the vmod unfortunately but it is free and easier. Make sure you have the latest NBitor (v3.5a) and NVflash (v5.57). Previous versions don't support the 8800GT. Use the thread on extreme bios mod for the 8800GT for switches and floppy DOS image. Remember to back up original BIOS first and have a spare PCI card just in case you need to flash it back.