[ECS] A790GXM-AD3 BIOS problem

Alright guys, I need some advice. I recently bought a A790GXM-AD3 black edition mobo and Phenom II 955 from the egg. Long story short, if I shut the computer down after adjusting ANYTHING in the MIB II (clocking/voltages) the system will power up but not boot. I have to clear the CMOS and then its fine. If I dont mess with anything in the overclocking bios the problem never happens, I can shutdown and reboot without needing to clear the CMOS. To be perfectly clear, it is not an issue of overclocking, I can keep the stock cpu setting but simply enable the changing of the values and the problem will arise. I tried reflashing the BIOS with both available versions on the ECS site but it had no effect. I replaced the battery on the mobo just to eliminate it as a cause. I put the sys togeather last night so its not an issue that came about after extensive use. So anybody got any ideas? Just a bad mobo? Ask for a refund from the egg and go with a better mobo (MSI, Asus, ect)?

For referance my related sys specs are
Windows 7 64bit OS
Phenom II 955
A790GXM-AD3 mobo
6GB DDR3 1333
OCZ gameXstream 700w PSU
MSI GTX 260 OCv3

If I were to take the CPU, for example, off of an auto setting but keep the cpu at a stock multiplier/frequency/voltage, then I would have to clear the cmos after I shutdown the computer. Not sure how to explain it any better than that, but its a moot point now. I am RMAing the board as I went out today a bought a Gigabyte MA790XT-UD4P like I should have done originally and the system works flawlessly now. Lesson learned, stick with know quality boards