I'm having real hassle here guys and i'd really appreciate any help. I've got 2 computers an amd 2600+ and a 3000+. They are stable if i set the bios so they run at 1700mhz. if i take it higher than this i get intermittant crashes - the monitor switches off and the keyboard goes dead. originally i only had 1 computer with this problem. i relaced every part - cpu hd ram floppy cd even down to the case and cables, but still the problem. now, with all the new bits, i'vr got 2 computers and the 2nd one crashes in exactly the same way as well . i must be doing something obvious wrong. plz help someone i am a muppet.