On the Dell forum, I have seen a number of comments about replacing the chip in an old PIII 500hz computer with a powerleap adaptor to give more zip. These adaptors allow the older machines (slot 1) to run a 1.4 celeron and are combined with a a fan and heatsink.
They cost about £120 in the UK.
Has anyone here had any experience of using such adaptors, or any comments? Thanks.