Hello guys. Have a problem - subj. First I found that cooler on CPU was installed incorrectly (hate these Intel box fastening). New thermal past and proper placement made CPU temperature OK. But restarts were still there. They became rare, but nevertheless. Was trying memtest, replaced power supply - nothing changed. Could you please help me understand what was the problem? My PC's dxdiag is in attachment, minidumps also. Basicly configuration is following: Core2Quad Q6600 Asus P5K 2 GB (2x1) Kingston DDR2 800 Radeon HD 4850 Gigabyte FSP Epsilone 600W Samples of savedump events: - The computer has rebooted from a bugcheck. The bugcheck was: 0x100000d1 (0x00000006, 0x00000002, 0x00000000, 0xb9e0c504). - The computer has rebooted from a bugcheck. The bugcheck was: 0x1000000a (0x000000e8, 0x00000002, 0x00000001, 0x806e4a16) Thank you very much.