Forgive me for posting again today, but i want to keep this more CPU specific.
I have an ivy bridge i5 CPU, on one motherboard that i have it stays on and i get no post.
If i try it on the other motherboard i have it goes into an infinite boot loop with no post.
And then i have another ivy bridge CPU that i know works, it goes into the boot loop with the first motherboard, but works fine on the second one.
Both motherboards support ivy bridge.