If Dual Core CPUs aren't of interest yet for you yet, the 925XE still makes a viable base for your P4 platform.

Using an Asetek Waterchill system, with only a water block on the CPU, we tested the overclocking potential of the Foxconn 925XE. We would have put a block on the chipset as well, but with the new chipset HSF mounting solution, we have no way of attaching the block to the northbridge chipset. We managed to get our 3 GHz P4 running stable at 3.75 GHz, which is a healthy 750 MHz overclock.



Link: Viper's Lair