FYI - that's ~74Watts for your CPU/FSB/VCore levels ECU.
ECU - MotherBoard monitor is a great utility to use - or CPUCool. As far as the 4th temp reading - an unused input - ignore it
Jim - yes, the inside channels is indeed what I was talking about. Approximately how deep are those channels Jim?
Zoson - higher velocity flow is better for increasing turbulence near the walls and for increasing the heat transfer coefficient. That said, even with a center rib that is 3x as thick as the current one, you would still have a fair increase in size from the inlet to the center area of the block.