I'm looking into building a new gaming pc, i've decided to go for an AMD CPU and motherboard, but with GTX 460 SLI. If someone could clarify that 2 GTX460's could run SLI fine, 16x/16x on this motherboard;
An SLi board will run two Nvidia cards in SLi which is why the board is listed as an SLi board and is called the "Asus M4N98TD EVO nForce 980a SLI Socket AM3 DDR3 Motherboard", the clue is in the title and the letters "SLi" after the number 980a. The PSU is more than enough as SLi'd 460 and the rest of the system together will consume about 400w under full load.
This is probably too late, but I have a similar setup:
CM 1000W Gold PSU
AMD Phenom II x6 1090T
8gb Mushkin Blackline DDR3
2x EVGA GTX 460 1gb
The BIOS will reset upon a cold boot after an OS session involving any 3D work, accompanied by a MemOK success message. I had to RMA this board, and it's still with ASUS.
Chances are I got a board with a bum chipset, which happens. The board has to be RMAd in this case, because it doesn't look like ASUS has any interest in providing another BIOS update for this model.
Also, if you plan to go the 6 core route, it may give you a "New CPU installed..." message during POST, even after clearing the CMOS. You will have to clear the CMOS again after the first boot to fix it.