Thanks for the reply. Yeah, I've pretty much come to the same conclusions... either the video card or the PSU. I have a multimeter, so I can test the supply from the PSU, just a matter of finding the time to climb in there and get it done. The video card on the other hand might be more problematic. I think I might have access to the exact same make and model of the card I'm using, but just have to sort that out with my friend who has the card. Anyway, thanks for taking time to reply.

~ Khepra