These temperatures were taken under a 100% CPU load using the Folding @ Home distributed client. A 1.33Ghz AMD TBird was used overclocked to 1.466GHz at 1.88v on a 133FSB. The same exact stock fan off the original ThermoEngine was used on BOTH heatsinks and a Delta Black Label 7000 RPM fan was used as our upgrade fan. These tests were run four or fives times ( I forget, it is 4:30am) to make SURE these numbers are correct in scale.