OCAU looks at five coolers for P4 CPUs, in the "this is getting silly" size range. On test we have Thermaltake's Silent Tower, Cooler Master's Hyper 6, Gigabyte's 3D Rocket, Zalman's CNPS7000B-Cu and Thermalright's XP-120. We test with two CPUs, one Prescott and one Northwood, and also consider the two stock coolers. Many of these coolers also fit AMD CPUs, so it's worth a read for fans of either brand.