Here's My situation...I had a great computer. A Athlon XP 2100+ with 1 Gig\nDDR333 (PC2700). Never had a problem with up until 2 weeks ago. Suddenly it\nstarted shutting down for no reason. Then I would get a warning that CPU was\noverheating and shutting down. Then as soon as I turned it on the processor\noverheated and shutdown. I don't know why it happened all of a sudden after\ntwo years. At any rated I figured i take advantage of this and upgrade.\n\nI purchased a Soyo KT600 Dragon Ultra Platinum and a new Athlon XP 2500+\n(Barton 333 FSB). I am using the same case. A nice Antec that includes a 330\nwatt PSU. I put the new MB in, screwed it down. Put the processor in,\napplied a bit of thermal paste to the core and installed a brand new CPU fan\nplugged in the CPU1 fan slot on the MB . Put in just one stick of ram\n(another issue? It's not on their list of memory but it has worked fine) one\nhard and GeForce5600 with 128mb. I reset the cmos. I plugged the tiny\nswitches like HD Led, Power LEd, and Power Switch.\n\nHowever, when I turn it on it doesn't post. The fans both CPU and Chasis\npower up for a second, a constant beep starts and the fans shutdown. The\nbeep continues until I power it off. I can't power it back on unless I\nunplug the cord in the back and plug it back in. I'm pretty stumped at this\npoint as I've building and servicing PC's for a long time. This is however\nmy first non-Asus board. Any ideas? I'm going to get a new PSU in a few.\nSee if that works.....\n\nAny help would be appreciatted.