"Well, Vantec have certainly thrown a lot into the new Aeroflow2 series of heatsink. The VP47245 Pentium 4 version makes uses a pretty cutting edge aluminum extrusion, with an embedded copper core to aid thermal conductivity along the way up from the core. Vantec's entire socket 478 heatsink weighs in at 472grams, and interestingly enough, gets by with just a 70mm fan; odd since 80mm fans are the standard these days. We'll be paying special attention to the heatsink thermal test results, because as you know Vantec also have a socket A version of this exact same heatsink (VA4-7245) on the market. With the differences in core surface areas, it is difficult to design a heatsink which works best on the AMD AthlonXP and Intel Pentium4 platform - one processor ultimately has to suffer for the performance of the other."