Been numerous threads about trying to compare hsf on different mb and all but even on the same board there can be trouble. I personally think the best way to compare is using delta. At 100% load my mc462 runs 19c over case temp. Thats on a abit kt7a with the thermister bent for good contact and a touch of AS on it. You might also want to mention that it is running at 1565 mHz at 1.84 volts. At Idle (depending on how idle you mean) it runs 1-2c over case temp. Thats also with acpi enabled. All I know is I got supposedly the bad chip AYHJA 9 and it runs very fast. But equally important is memory, motherboard, and power supply. Weakness in any area shows up as a unstable computer. HTH