a quick guide to show how to use NiBiToR to adjust voltages using the voltage register function...
Requirements: GT200 with Voltera voltage regulators (all 65nm).
Disclaimer:
DO NOT GO TOO HIGH ON STOCK COOLING This is VERY risky... not only are you flashing, which is risky in itself, but you are also running a ton of additional current through the VRM's. So that's double trouble. Watch those VRM and GPU temps! This will simultaneously pop your VRM's and void your warranty
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Get NiBiTor (5.2 or later)
http://img.techpowerup.org/091119/Step1.png
1. Export your bios using GPUtool (best tool ever).
http://img.techpowerup.org/091119/Step2.png
2. Save the bios...
http://img.techpowerup.org/091119/Step3.png
3. Go into the
Voltage IC setting
http://img.techpowerup.org/091119/Step4.png
4. Modify the highest register to whatever setting you want (i would stay below 1.36, unless you have LN2, in which case you don't need this guide in the first place)
http://img.techpowerup.org/091119/Step5.png
5. REMEMBER THE SETTING.
http://img.techpowerup.org/091119/Step6.png
6. Go into the Voltage table editor...
http://img.techpowerup.org/091119/Step7.png
7. Modify Entry #4 to the previously set register voltage.
http://img.techpowerup.org/091119/Step8.png
8. Click off the Voltage tab... just to allow the window to refresh
http://img.techpowerup.org/091119/Step9.png
9. Click back on the voltage tab... you should see a blank "extra" setting.
http://img.techpowerup.org/091119/Step10.png
10. Select the set Voltage.
http://img.techpowerup.org/091119/Step11.png
Voila... flash the new bios and your GT200 will run at the set voltage. This let me hit a 24/7 solid overclock of 810Mhz Core and 1620 Shaders... 839Mhz and 1678 for benching
Happy overclocking.