If you are in need of a new Pentium 4 cooler then you must read Hardware Unlimited's Pentium 4 Cooler Round-Up.
"The trend of faster CPU’s will never end, and Moor’s law is still in full effect. So what does that mean for the industry and the end consumer? You guessed it, more efficient cooling technologies! Lately we have been seeing an influx of water-cooling kits for the average consumer and very impressive air-cooled heatsinks. Whereas the former costs a pretty penny, an effective air-cooled heatsink is what the mainstream user can afford. So, we selected some of the newest and in our eyes most attractive heatsinks and put them up against a mid-range P4 Northwood 2.4GHz. The 2.4GHz has a maximum heat dissipation of 59.8 watts, which is under the 68.4 of the newer 2.8GHz, but you can expect the heatsinks in this roundup to cool high-end scorchers like the 2.8 and possibly even the 3.06 as well. Without further ado, let us take a look at the heatsinks in the roundup."
Read the round-up
here