My 300a with the BH6 runs pretty stable under NT, even at 450/2v. However, it always seems to crash with Dr.Watson after an hour or two of operating. However, it has also stayed rendering (100% usage) in 3DS Max for seven hours at a time, only to crash after a new render starts.

The heatsink doesn't feel hot at all, nor does the vid card. Could that still be a problem? Could it be hot enough to disrupt operation without feeling it? Is this the type of problem caused by ram? My other components are handling things fine. I am flustered and am hoping someone more experienced can help me.