tritochke

first of all, I'm noob just to get it out there.
I'm not sure if this is the correct place to place this thread, this is my first one, hope someone can help me out with my ASUS+ATI problem.

ok, specs are :

Asus P6T6 WS Revolution (1 PCI-E x4, 2 PCI-E x8, 3 PCI-E x16, 6 DDR3 DIMM, Audio, Dual Gigabit LAN)
Motherboard Chipset Intel Tylersburg X58, Intel Nehalem
AtiRadeon 5870xxx Series ( PCIE/PCI )

CPU Type QuadCore Intel Core i7 930, 2800 MHz (21 x 133)

DIMM1: Mushkin 991805 (996805) 2 GB DDR3-1333 X3 ( 6GB all )

Ok, so much for the specs, to avoid pointing out the endless line of problems I've seen so far let me just ask someone here is there any way to coach me how to set my BIOS with this specs in order to work, mind you I don't need any Overclocking setup for now, I just want this darn thing to work.
latest problem was 3DMark ran perfect on EXTreme mode, finished and reported no errors.
BUT, seconds later, I opened COH just for in-game testing ( and this is really OLD game ) and just when I was about to move single unit and navigate with keyboard across the map, system halts/freezes rendering any OS recover function totally useless, I can't go into taskbar and kill processs cause system just stares at me and waits for a reset button.
I know this specs CAN work but I don't know how to set it.Can someone help me please ?!
What's the best way for setting BIOS, ( it's updated to latest version, just like the BIOS on Ati Rad )

Thankyou people, God bless you all