11Ω (or 15Ω?) between vSense pin and ground is a horribly low resistance. I was expecting something around 45Ω since G80GTS/GTX which measures to 35Ω output 1.28v, and since the GT has lower vGPU thus the sense resistance should be higher than those on GTS/GTX as all use the same PWM IC. <20Ω is very low and IMO somwhat suspicious...
If someone is willing to be a guinea pig then I would suggest soldering a 500Ω multiturn VR between this point and ground. Before soldering measure the resistance between soldering points (should be ~15Ω), set VR at max resistance (500Ω), solder the VR, measure resistance between soldering points (should be ~14.5Ω, if much less don't turn the card on) tune down for more vGPU.
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