|Thanks for the prompt response. I really am scratching my head here trying to find a cause other than a bad video card. Tech support at Asus have suggested it may be a hardware fault but I'm waiting for them to reply to my e-mail.|
The Asus branded 9600 was brand new and unopened. I literally received it from eBuyer yesterday morning and tried installing it last night.
The computer in question is around two and a half years old. I built it before going to university.
The 7900 died very suddenly. One moment I was online in Firefox, the next it was trying to reboot and beeping at me with a blank screen. I did have a power cut a few weeks back, but my machine is plugged into a surge protector and I unplugged it from the wall before the power came back on so that if there was a surge, it wouldn't harm my machine.
When I started trying to work out what was wrong, I took the machine downstairs where I have more space and when I tried to power it up, the CPU fan started to run up and so did the GPU fan. Then there was a very unpleasant burning electrical smell and everything turned itself off. One of the voltage regulators on the 7900 smelt like it had failed.
The power supply is a Hiper 530W Type M. I've built three separate machines with these PSUs and never had any problems before.
Unfortunately, the M2V doesn't have onboard video. I had to borrow a spare 7100GS from a friend to get the machine booted up. With the 7100 installed, it runs absolutely fine, so I assumed the problem was with the 9600. I don't know if my friend will be able to test this 9600 but I can ask.
I do have screenshots of the problem if you would like to see them.