Hi everybody, I've been having some issues with my system the past 2 days and am hoping somebody can help me with them. My relevant system stats: ASUS P4P800 Intel P4 2.8 GeForce 5700 Ultra I left my system on all last week while I was gone on a trip to Vegas. When I returned yesterday morning, there was a notice saying some XP updates had installed and I needed to reboot. Before I could even move the mouse pointer to click the reboot button, the system rebooted itself. It then got about halfway through loading stuff in my taskbar before it rebooted itself again. This went on 2 or 3 more times and I finally just shut the damn thing off, figuring I'd deal with it after I got some sleep. When I turned it back on in the morning, XP booted up just fine. However, about 10 minutes in, the screen output went crazy (random blocks and lines of color) and a voice started playing over my speakers but it was too low to hear what it was saying. I rebooted into safe mode and the same thing happened again, only this time the voice was loud and clear "System failed CPU test". I immediately shut down and reseated both the CPU and all cards in the system. When I turned the computer back on I confirmed that all fans were working and not blocked by dust. It booted back up into XP and worked fine for a little while. I checked all the power supply voltages using ASUSProbe and they all checked out ok. Then all of a sudden the screen lost signal. It came back a few seconds later but then the computer rebooted itself. It lasted again for a while longer before losing screen output again, only this time when it came back it was in a really low resolution with a notice saying that my display drivers had stopped responding normally. I updated the drivers a few weeks back, so I went ahead and rolled them back. XP lasted for several hours the next time and I thought I'd solved the problem, but then the screen started losing output and the system rebooted itself. Atleast there was no "system failed cpu test" error this time. It lasted all the way through the night on the next boot, but this morning I momentarily lost screen output a few times. For any video playback, the video stream was just a bunch of random bars and blocks of color, but the sound played fine. My mouse pointer also would double or triple in size and become a series of yellow and magenta dots when hovering over certain parts of windows. In Windows Explorer and during the XP shutdown screen, several images were displaying as just big black boxes rather than actual images. I just rebooted a while ago and everything seems to be running ok right now (including video playback), but I'm at a real loss for what to do. I want to think the graphics card is going bad due to all the crazy screen output, but I don't really get why that'd give me a CPU error (and why the error would suddenly disappear) or why I'd get normal screen output other than video files. Any help or suggestions would be greatly appreciated.