Hi Paul, This sounds like it could be a heat problem. Check and make sure the heat-sink is secure on the CPU. If it is and you are still having the problem, verify the correct voltage is being used on the CPU, and apply some thermal grease between the heat-sink and the CPU. It's possible that it is the power supply. Unfortunately, the only way to easily verify this, aside from using a voltage meter, is to try another one. Hope this helps! Kyle Elmblade Distinct Computer Solutions [log in to unmask] From: "Paul Anderson" <[log in to unmask]> Sent: Monday, June 11, 2001 11:37 AM Subject: [PCBUILD] Help with a new computer I am building > I'm building a new system and I'm having trouble with it. Every half-hour or so it will lock up and I will have to turn it off at the power switch in the back. Well if I go to turn it back on, it won't turn back on. I have to leave it off for about fifteen minutes and then it will turn on. Me and my brother think it is the power supply, but I don't want to send that back wait two weeks and find out that isn't what is wrong. Please help! PCBUILD maintains hundreds of useful files for download visit our download web page at: http://freepctech.com/downloads.shtml