Hello forum, My new-built computer crashes and I want some help diagnosing it. Specs are: ASUS P8Z68-V MOBO Intel Core i5 2500k CPU G.Skill DDR3-1600 8192MB RipjawsX (F3-12800CL9D-8GBXL) RAM No discreet graphics card WD SATA6 7200 RPM 32mb cache (WD7500AALX) HDD XFX XXX 650w PSU Running fresh Windows 7 I've flashed BIOS a couple times but it's not the cause, it has started crashing before that. Also it doesn't seem to crash when I simply browse internet. Unfortunately I do not remember what was I doing when it crashed first couple times but currently it only seems to crash when I run Team Fortress 2 game (it runs all right for random amounts of time but crashes the comp eventually). The game itself obviously isn't the cause, it's one of the things that trigger crashes. The CPU runs under 30C heating up to 35 when I run the game. I've run Windows 7's RAM test and it reported no errors. Some of the voltages that BIOS reports: CPU: fluctuates up to 1.52V 3.3V: up to 3.392V 5V: up to 5.240V 12V: up to 12.192V DRAM: up to 1.671V All set to auto by default in BIOS (I haven't touched any settings in BIOS yet). I really hope you people help me at least narrow it down from infinite amount of possibilities to something more certain. Thanks in advance! P.S.: by crashing I mean rebooting (it shuts down and then boots back on).