Hi there, this is my first post here, sorry that I start off with a problem but Im desperate to fix it. I just bought a new computer (1/2 a month ago). 2X Video Card:Geforce 8600GT 512MB PCI-E DDR3 **X2** SLI Enable 4GB DDR2-800 RAM 500GB Western Digital/Seagate SATA-2 SE 7200rpm (250GB X2 as Raid 0) AMD Athlon64 X2 6000+ Dual Core processor NVIDIA nForce 590 motherboard. WinXP 32bit SP2 500W PSU I bought this with the thought that I could play most games at high settings. The system seems to run fast and well with no obvious problems. The exception is when I play quite high demand games like Oblivion (but not only that game). After a while playing the monitor starts showing small horizontal lines that flicker about the screen. The longer I play the more seem to show up. The only way in which I have found to fix it is by restarting the computer. (When I exit the game the problem remains) I don't think its the monitor because I used my old 5yr CRT monitor with the computer which had the same problem before I used my new LCD monitor. I recently updated my display driver and that had no effect, turned off SLI briefly and found that the graphics went bad earlier. The only other thing that I could think of that might be the problem is overheating components. Any help would be GREATLY appreciated. Cheers.