Faulty CPU?

Hey guys,
(hope i'm posting in the right section)
so i'm trying to upgrade my cpu from a core 2 duo e4600 to an e7600
though once i installed the e7600 my pc would not go past the asus post screen (where you press to access bios), the caps lock light comes on and i cannot do anything, i cannot flash the bios, i cannot access the bios, i can't even press <TAB> to switch to the detailed post screen. so i'm starting to think it might be a faulty cpu (if that is possible)

here is what i have tried -
- i have tried removing everything from my mobo and reconnecting only necessary stuff (1 stick of ram, GPU, HDD etc, and still nothing.
-i tried removing the litium battery to reset and then reconnect it.
-and i have put my old cpu back into the pc and that works fine...

here is what i am running
asus p5kc
intel e4600 (upgrading to E7600)
6gb ram
geforce 8800gts

any advice would be great. thanks in advance