I had that SOC that you have. Awesome card. You can flash it with nvflash I've done it. I used the lightning bios and was able to crank voltages up to 1.26, more with a memory editor and my highest stable at 1.26 was 1400. The card was recognized as a lightning in afterburner even had triple voltage support. Those cards are tanks. They also have voltage check points
EDIT: This was the best of the 1400 runs that I have saved, I recall hitting just ever slightly higher though I think it was the P Score and not the graphics going up. Would have gone more but I had an accident with my multimeter.
http://www.3dmark.com/3dm11/3966748
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