AVC Z7U7408 Pentium 478 Copper Heat Pipe CPU Cooler Fan Very high performance socket 478 CPU cooler with dual copper heat pipes fast 5400RPM fan moving a MASSIVE 46 CFM (Cubic Foot per Minute) of air Excellent review at http://www.frostytech.com/articleview.cfm?articleID=1576 Cools up to Pentium 4 3.4 Extreme Edition EE SL7CH 478 CPU !