Hi I have been getting some crashes in my new rig (self made) specs below: Case; Antec Nine Hundred Ultimate Gaming Case PSU: Hiper 580 watt Mobo: Asus P5N-E SLI 650i Socket 775 PCI-E Onboard Audio ATX Motherboard Processor: Intel Core 2 Quad Q6600 (2.4GHz 1066MHz) Socket 775 L2 8MB Cache (2x4MB (4MB per core pair)) Retail Boxed Processor Card name: Radeon X1950 Pro Shappire 512meg Memory: OCZ 2GB Kit (2x1GB) DDR2 800MHz/PC2-6400 CL 4-4-4-15 PLATINUM XTC with LIFETIME WARRANTY HDD: 2 x Samsung SpinPoint T HD160HJ 160GB SATA-II 8MB Cache - OEM DVD/CD: LiteON DH-20A3P-12C 20x DVD±RW x12 Ram Dual Layer DVD-Writer (Black) - OEM DVD/CD: NEC AD7170A 18x18 DVD±RW Dual Layer ReWriter (Black) - OEM OS: WinXP sp2 AV: Macafee Firewall:Macafee Route:Linksys AG241 ADSL2+ Modem/Router It happens when I am playing 2 games MOH:Airborne and Enemy Territiry Quake Wars, although my wife had firefox shut down on her for no reason the other day and reboot the system! All drivers upto date as far as I know. Chipset updated BIOS not updated as I do not know what I am doing there! Games reinstalled twice and latest patches applied new fan added to case (see case specs) Nothing overcloked all set as standard Did have to run chkdsk one day as system would not boot past loading screen, it found errors and fixed them and then system rebooted ok This was very early on , not long after the build was done, say about 3 days or so. If you need more info I will supply it, sorry it is not as good as the example first post that was awsome!! I have attached some mindump files in and a DxDiag if that helps? I have put 5 in there zip but I had 2 such events on some days so only included 1 from each day.