So a friend and I just tried the vcore mod on our first Giga card, and it looked like it was all good, however when we plugged the card in and tried changing the voltage nothing seemed to happen.
We were using GPU-Z for the voltage measurement for ease as it was 0.01 out compared to the multimeter.
Eventually whilst turning the pot the screen went crazy pink for a second then black, a PC restart and everything seemed fine again.
Any ideas?