Hello! I made one topic (http://forums.techpowerup.com/showthread.php?t=123640) about random crashes during one certain game (no crashes on the other time or with other applications). After 3-4 windows reinstalls and not installing cataclysm drivers my pc didn't freeze anymore. Thought everything is okay. Yesterday I was playing again and my PC suddenly shut down. When I pushed the power button, my fan started working at 100%, 3 of 4 graphics card red lights turned on and nothing more happened. No screen, no beeps, nothing. Tried several times, same issue. I tried my power supply on other comp (needs normally around 200 watts) and it worked fine. So I have ran out of ideas. Maybe someone knows how to test my pc hardware or have had similar issue? My PC stats: CPU: E8400 @ 3,00GHz with TT TMG2 RAM: 4GB A-Data EXTREME DDR2 1066+ @ 800Mhz 5-5-5-15 timings 2.0V MOBO: Asus P5K Pro - updated to latest bios (1303) Video: HD4870 512mb - 10.4 drivers Powersupply: Blue Storm II 500 W Cooling system: Thermaltake TMG2 Thanks!