I just assembled a new computer, and for the video card I'm using a Sapphire Radeon X600XT 256MB PCI Express card. The entire computer has been running fine, but on several occasions, the video card has failed. The screen goes blank for about 30 seconds, then comes back on, saying hardware rendering has failed and that it will be swtiching to software rendering. I have the most up to date drivers installed, so I can't really find out what the problem is. Shoujld I just return the card and get a new (or different) one? If you need more specs for the computer just tell me and I'll post em.