I recently installed a new ASROCK 939NF4G-SATA2 motherboard with an AMD 64 3200+ processor. I did a fresh install of Windows XP and installed Service Pack 2. I also updated all of the mobo drivers (Audio, LAN, USB, AGP). When I am working in Windows it runs very good with no hicups or any issues. I also ran a burn test and then immediately checked the temperature (112 F). The problem is when I play my game of World of Warcraft. It will play fine and then suddenly my monitor (21" IBM CRT) goes black and then in a few seconds turns back on again. This will happen once or twice and then when it comes back it is locked up and I have CTRL ALT DEL to get back to the Windows screen. I have used a Pentium 1.8 with the same video card (ATI 9800) and it worked perfect with no problems. Any ideas?