I know that this isn't totally on subject, but for future reference I suggest that you take a look at this photo that I posted: Important C64 3D graphics card mod
Sorry if your board isn't the same, but drivers or no drivers, monitor or no monitor, the two lattice chips on my C64 3D run aufully hot. If your gfx card has one of these chips and its cold after a hour with power applied, then i'd suspect that it could be fried.
Hodgkinson
