April 30, 2014, 02:49:42 am
Looks like progress (of sorts
) is being made to identify the problem, thanks for the updates.
From what you have found out so far, it seems to point to the Titan card. These issues were not experienced before you upgraded to the Titan card, and crashing on FurMark confirms it's much more likely the card, than the remaining possible, of the motherboard.
It may simply be that the card needs to be removed and placed back in, possibly on another PCI-e16 slot.
If you are able to swap the card in the loan PC and test than perhaps that will give confirmation as well.
New cards can sometimes, not often, but sometimes be faulty.
Keep us posted, all the best.