I have a problem with a pretty old sistem: spontaneous restarts and BSODs. I formatted and reinstalled the OS, I tested the RAM with MEMTEST86(no problem), I tested the HARD DISK(no problem), I changed the IDE cable, I changed the power supply(500w), I changed the Video and the problem persists. my sistem : - amd sempron 1800+ - 512 MB RAM pc3200 - asus a7n8x - nvidia nforce fx5200 - dvdrw teac - hdd western digital 200gb I forgot to mention that sometimes i receive the message :"Warning!cpu overspeed!" when BIOS performs the "system inventory" and sometimes my cpu figures "1150Mhz", altough sometimes my cpu figures "1800+". I hope you can help me with some advices.Sorry for my bad english.