Quote Originally Posted by pushook
On the first HS there was on all edges a little bit rough but nothing in the middle of the HS.

On the new one I donīt know because the HS is about 3hours on it I will check this in a few days.
I think your IHS is concave. Mine is concave too. You need either put more AS5 at the center or lap the IHS

Another factor is your cpu batch number. Those B batch CPUs are hot.