I have been having a lot of trouble with my new card from XFX it is the Geforce 9800GT 512Mb. The problem is that whenever I start a 3D application mainly games my computer will randomly reboot. I have been able to play anywhere from 5sec to 2 or 3 hours. So far I have tried 3 different drivers, the one on the disc it came with, the latest on NVIDIA's site, and the one from XFX's site. I have already submitted a ticket to XFX with no reply. I have also tried several different games, UT3, WOW, Red Alert 3, and a few others all of them reboot eventually. I have opened my case up to allow more air flow and it has made no difference. I have also upped the fan speed on the card using NVIDIA's tools. Nothing is overclocked. Here is my system Pentium 4 3.0Ghz 2Gb DDR 3200 RAM 2 Hard Disk 1 DVD Burner Windows XP sp3 XFX Geforce 9800GT XXX 512Mb Asus P5GD1 PSU 550W I appreciate any help you can give.