OK, I am highly suggesting plumbing the Fusion block into your loop if you can. Dropped NB temp from 47°C to 34°C under load. NB volts at 1.65. It also helps anything on the heatpipe lose a degree or two, my SB temp is down some too. It didn't kill my flow too bad, dropped it some, but not bad. All I had was a CPU block in the loop anyways. And the MCP655 has a lot of push power.