Update: The M4A78Pro arrived with a AMD PhenomII x4 955 and a LianLi 850w PS; and 4 gigs of Corsair DDR2 800 RAM.
Installed in my Antec P160 case and no power up. Checked the leads, and still the same. Reset CMOS. Got momentary CPU fan spin. Then died. Reset CMOS again. Still no Joy. Changed to an older but working PS 500w. Powered up. Posted. Got into Bios (0508) reset Bios for Defaults. Bios is very old, many revisions up to 1203 now. Wish I had updated Bios while I had the chance; because after setting defaults, it now doesn't Post, only get black screen. It's a revision 1.02g board and reading the ASUS forums ... it seems many have a problem with this board not being compatible with x4 Phenoms. ASUS says they are compatible; but I'm sure they LIE ! Went thru the troubleshooting procedure from ASUS. Filed a tech report; Reply was; do the NO Post trouble shooting procedure, which I had already done. Most of the forum complainers were RMA'ing; some as many as 3 and 4 times ! ASUS seems to have dropped the ball as far as quality control goes.
Mine gets RMA'd on Monday. I doubt that I will get another ASUS product; although of the 2 dozen ASUS mobo's that I have purchased; this is the first one that goes back! Now to search for another mobo that has all the qualities that I want. Sata Raid; a Floppy; DDR2; X4 955 Phenom II; at least 8 USB ports; simple OC'g procedure; etc.