Weird problem, Yesterday my setup was pretty stable I did run wPrime tests and lots of other and did run QMC Boinc project for a while, now I did put my geforce 8800GTX back in and those same bios settings and CPU is not stable
There is two photos of my bios settings:
http://kotisivu.dnainternet.net/bull...5x9_bios_1.jpg
http://kotisivu.dnainternet.net/bull...5x9_bios_2.jpg

CPU is Q6600 G0 and watercooled.