You say you just bought CPU but have board? So I'm guessing the CPU you had before worked?
Update the BIOS with your old CPU and try clearing the CMOS.
Yes, it will work just fine. Notice that CPUs with 1333MHz FSB are supported. Plus I've seen the Mobo and CPU in a combo deal.
hey xfx nforce is not supporting for Quad processors
Is there a BIOS Update for your XFX nForce that you have not done ???
I updated BIOS also but it did not work
continuously i got blue screen errors
Finally i changed to another board