thanks for the answer.
> Have you updated the BIOS code stack?
I've downloaded last BIOS on INTEL website and updated everything
> Which BIOS level are you running?
If you mean the version is the 03/11/2011 release
> are both 2x4 12 v CPU power plugs from teh power supply connected?
> Check the 2nd CPU socket for any pins that may be bent.
If i install 2nd CPU in 1st socket i have no issue..so CPU works fine