My sister has had a 9800GT in her machine for quite a while now and until recently has been a good runner if a little noisy under load. However, the system recently crashed (BSOD) under gaming load and has since been very flaky with artifacts appearing in games. Then the other day after boot up the desktop resolution was clearly wrong and the Nvidia control panel would not load, claiming 'you are not currently using a display attached to an NVIDIA GPU.' I'm guessing it overheated and killed itself, but If anyone knows and fixes other than replacing the card It would be a great help. I have tried installing a new driver with no effect, and I think I might try cooking it to re-seat the solder connections and repair heat stress cracks in the chip. It kinda worked for my mates old 8800GTS for a while.
any ideas would be appreciated.