I knew these chips were hitting 3.5GHz+ on air, so hitting the 4.5GHz barrier with a VapoChill isn't surprising. Impressive, for sure, but not all that surprising.

"At the Vcore of 1.4375 volts, FSB and North Bridge of around 1.43 volts, and memory at 1.92 volts, we managed to get stable 4.5GHz, FSB1800 operation. A nice 72 GFLOPs - double precision, of course - workstation!"