This seems to be a common problem, as I have read many other threads addressing the same issue. I have tried all the suggestions from other posts, but my problem persists. I just built my new PC two weeks ago, and everything seems to be running smoothly...until I loaded the first game: Far Cry. The game installed without a glitch, but soon after I start playing it, the screen would black out for fraction of a second, then turn blue for about 250 ms, and then the system reboots. This happens everytime I play Far Cry, but the rebooting occurs at different parts of the game (but I never get too far). It usually happens about 1 to 5 minutes into the game. The rebooting also occurs with my 3D OpenGL screensaver (Helios), but never with any other program. The browser (FireFox) never triggers the reboot, and neither do Paint Shop Pro or any other 2D graphics program. From what I've read so far, some people who had the problem found a resolution by updating the motherboard driver and the graphics card driver (which I have done already). Some people suspect it's a power issue, but I have plenty of juice from my PSU. Here is a complete spec list: ASUS nForce2 A7N8X-E Deluxe motherboard Athlon XP 3200+ Barton ATI Radeon 9800 Pro 128 MB 8X AGP Antec PSU with 430 W Kingston PC3200 DDR (512 MB)x2 Seagate SATA HDD 200 GB Windows XP Professional Edition (with SP1) Resolution attempted so far: 1. All fans are working properly (chassisx2, PSUx2, CPU, graphics card) 2. CPU with thermal paste properly applied and without overclocking 3. Motherboard drivers updated, including nVidia nForce2 chipset driver for GART (AGP card) 4. ATI Radeon driver updated to the latest I greatly appreciate any suggestions and ideas to try. Thanks in advance.