I couldn't find anyone having issues with the same set-up as me, I am running:
Core i7 920
6gb Super Talent DDR3
WD 10,000 RPM 300gb HD
Geforce core 216 GTX260
Antec nine-hundred case
EVGA x58 mb
Basically after my initial install of windows when it asked to restart the pc restarted, for a few seconds it began to load everything then just shut down. After about 6-10 tries the pc started up again and worked fine. I can get this system to run completely stable while playing WoW, but if I ever have to restart it it just shuts down after a few seconds and then I have to power it on 6-10 times so it will stay on.
I have done the initial install with only 1 2gb stick of memory and have yet to add the other 2 because of the current issues. I realy didn't think this would be a memory issue though because I can get everything to power and stay powered on with no issues for hours but it takes me hitting the power button many times.