Specs: Windows 7 (x86) installed on a Raid0 array, Intel E8400 (stock), Asus P5K-E, 4x1GB OCZ ram (@800MHz, 2.1V), Ati HD5770 graphics card, Sonata case (550 W p/s) Occasionally when gaming, my PC crashes. 60% of the time, the display gets distorted for a fraction of a second, then the monitor enters standby. Any audio that was playing loops endlessly. The computer becomes completely unresponsive (does not even toggle capslock/numlock leds) and requires a hard restart. 40% of the time, I get a BSoD and a mini dump is created. No corresponding entries appear in the Event Logs. These crashes occur during transitions (e.g., at the end of a cutscene, at the end of a load screen, or as I move from one room in the environment to another), but not during regular gameplay. Also, the crashes are non-existent with older games, like Doom3, but quite frequent on MassEffect2 and CoD: Black Ops. When gaming, CPU and GPU temperatures are in the high 50s. A 3-pass Memtest did not reveal any memory errors. SFC verified all system files. I also had this problem with my previous video card, an Ati 2600XT, but the crashes were less frequent. I'll be replacing my Raid0 array with an SSD in the new year. So any solutions involving reinstallation of Windows will have to wait until then. The system is fine when not gaming (and I don't have a lot of time for gaming at the moment). However, I would appreciate any insight you have in identifying the specific cause of these crashes. Thanks in advance.