Well, I went out the other day and bought the Visiontek Ti 4600. But it simply crashes windows whenever it feels like it. Seems random: sometimes I'll be playing a game, sometimes I'll just be doing something online, sometimes I'll leave my PC for a few minutes and come back to find it on the logon screen. I previously had a gf2 gts with no problems. Before I installed the new card, I removed the old drivers, shut down, removed old card/installed new card, booted up, and installed the new drivers. I've done everything the Visiontek FAQ states and called their "tek" support. They say this board *MUST* be on IRQ 11 and this IRQ cannot be shared by anything else. OK, well I did what I could: re-assigned what I could in BIOS, tried moving other cards to another PCI slot. XP wont let me change IRQ settings within windows. Whatever I try, the gf4 is always sharing an IRQ with something. Arrggg. I've tried the drivers the card came with (27.50), newer drivers on their website (28.30), and the 28.3 on nVidia's site. All have the same effect. I really don't think its a driver issue, but a hardware issue. Once windows reboots, it tells me the system recovered from a serious error. When I submit that error, MS can't find the reason why. The event log simply shows a system error too (not video or application error). I have even tried updating the AGP miniport drivers from AMD. ANY help would be appreciated. I am to the point where I am going to take this card back and get an ATI instead. I have been a Geforce fan since the old 256 and don't want to go to another brand.