CMOS/GPNV checksum error

OK every once in a booting my PC makes no intention to gp further than Early chipset intialization and if it passes taht then it hangs at Memory detection test, the cure is to unplug it prom power ( pulling the cord out of the PSU) and then to wait 1-2 minutes and to start him up then I get the sweet error report as written in the subject! What to do?
Also it still checks the NVRAM ( allthough I switched to Ati some while ago).
I got the newest BIOS ( according to Live Update2), and I have cleared the CMOS but the problem persists!

CMOS battery going dead? maybe replace?

After only one year????No way!Probably repalcing the board will help!!!

that read like the psu is closing itself down as it senses its trying to do to much to me

Problem solved

Well As you can see from my sig I bought a new PSU, and since then this cute error didn't appear again. So probably the PSU, since I'm saving money for a new Board I had to buy a new PSU ( the old one hasn't got the additonal 12V connector)!