I'm having a bit of trouble

I'm using this motherboard with 4GB (2x 2GB) of the "approved" Patriot ram, a Corsair 550w psu, ATI Radeon 3850, Core 2 Quad Q6600, Liteon DVDR (sata version).

what's happening is that vista 64 freezes on bootup. I've got the 64 bit "installed" but this is the boot I'm trying to do after the install (first boot to finish installation) and it freezes.

Anyone else having this problem or know how to fix it?

p.s.: tried changing ram channels and even taking one stick out and still no dice