Warning:Main bios checksum error

[ja2imd]

Hello dear support and all the other.
I have a problem with my M.B.
I got message on POST -
Warning : Main(sometimes its backup too) bios checksum error
Bios Auto - Recovering and its loop again and again. I can't use keyboard nothing.
When and how its happen :
I have -
quad core CPU
MB GA-ep45t-ds3r
2 GB RAM Kingstone support dual channel 1333Mhz
650W PSU
ATI X1950
1 CD/DVD and 2 HDD
Well i bought new memory ‏2x2GB Kingston HyperX Blu Dual Channel 1333Mhzl and Gigabyte HD 6870
install it and after 1 day its happen.
I have removed the new devices(hd 6870 and new memmory) and put on the old(ATI X1950 and th RAM that was before) and still same.
I tried to reset the cimos with jumper and remove the battery for shots and long times disconnect all the devices(CD,hdd's)
left just CPU,VGA,RAM. And still have this message came out.
Please help me to fix it.
Thanks
Alex

[Dark Mantis]

I notice that your post has been stopped by the security program on the forum but anyway it was a double post so please do not do this.  I have answered your origianl post in the other thread.