Previously, we only managed a 156FSB overclock using the all aluminum stock Intel cooler, and unfortunently with the Aeroflow, we didn't get much of an improvement. At 157, the system was stable in all benchmarks but 3D Mark. At 156FSB, things were rock solid. What is important to note that at full load, at 156FSB, the stock cooler managed 68C, whereas the Aeroflow kept temperatures at a steady 66C.