well i dunno about voltage, lol
all i know is my cpu running about 1.6v now. standard
too much heat i very much doubt, i know my pc is running hot now 53C but it should still last long enough to get to bios to check the temps, its just a plain black screen when i hit the power button.
might have a look out for a 3200xp as a last ditch socket a upgrade before i have to buy a new setup, does the 3200 overclock easily?