Upgrading from e2160 CPU to an e8400. Planning to use the stock HSF for now, as I don't intend to OC for a while. I note that the e2160 heatsink is about 2x deeper than the e8400 heatsink. They both appear to have an aluminum contact with the CPU. If that's the case, would the old e2160 HS do a slightly better job cooling my e8400? Everything else appears to be the same...