8800gt GPU in my rig seems to be in the process of failing. Yesterday my screen went blank and I had to shutdown the pc. On the reboot it would post ok but with small artifacts during the post. My Windows 8 won't boot unless I boot in the safe mode. I tried to "repair" and "refresh" OS but it didn't help. I tried to update the nvidia drivers too. I get a "VIDEO TRA FAILURE" or something in that sense, I can't quite make out the "TRA" due to a low resolution of the error screen. I tried booting a live Ubuntu CD and it boots ok except for the resolution being limited to 800x600. I expect to borrow a GPU to test in my rig to confirm that it is the GPU that is faulty here. Questions: 1. What do I buy to replace it? 2. If I replace it with another nvidia card, can I just get the old one out and slot the new one in? Or will I have to uninstall and install the driver? Or reinstall the entire OS? I am thinking £88 EVGA GTX 650 will do, purely because it is new (new standards, ports etc) and I've been using Nvidia for last 5 years. Alternative could be ATI 6670, silent Saphire one for about £70. I value silent running and low power draw and EVGA costing £20 more is irrelevant. I assume that EVGA on idle won't be louder then my case fans so silence of Saphire won't really be a feature worth having. I expect idle power draw to be very similar. My screen is 1600x1200, intel 920 cpu, 6gb ram. I don't play games anymore but I play HD video so I would like GPU to be capable in that with the decent standards (cuda video acceleration etc) Any thoughts?