emachine T3265 woes / Athlon XP CPU

Beware overclocking an Athlon XP chip! I have an Athlon XP 3200+. The "CPU Multiplier" setting in the BIOS was set to 200 inadvertently, and it was causing occasional random crashes, especially in Firefox 2.0.0.6 on Ubuntu Feisty 7.04, and I couldn't compile the Linux kernel without the gcc 4.1 compiler getting segmentation faults. At first I thought Ubuntu and/or Firefox was just buggy, so I went back to Fedora Core 5, but the problems remained, which made me start suspecting hardware issues. I ran a memory test for a short time and it passed. I tried to update all the packages to the latest, and FC5 crashed in the middle of the upgrade, rendering the machine unuseable, so I just installed Fedora 7, which also would crash and freeze randomly. I Googled some info about crash problems with Athlon XP chips that mentioned that slow memory problems can be alleviated by redusing the front side bus speed. My BIOS doesn't allow changing FSB speed independently from CPU clock speed being does allow changing the the CPU Multiplier setting to 100, and all the random crashes stopped! In hindsight, I should have run the memory test all night. It would probably have detected the memory speed problem eventually.