How do you measure how much voltage is going to the 1)GPU, and also to 2)RAM? I got a sneaking suspicion my 8800gt has a bad voltage regulator or something similar.

At stock fan speeds and bios I can only overclock to 635/900. Move the ram to 905 and I get errors. I have never seen such a bad overclocker of a card before, not even when I first got my radeon rage 2 card.