If you are technically savvy enough to swap out the motherboard, my thought would be it might be time to migrate to a new system. You could move the CPU to a new board of your choosing, add a new case, and many of your existing parts should probably be movable as well. The problem with the Dells is typically under-sized power supplies. Once you get into new hardware that approaches today's state of the art, you'll need more power, somewhere at or above 350 watts, depending upon what you decide on. You'll also probably want to upgrade your cooling as well. There are plenty of build-your-own tutorials on the web and there is much assistance that can be had on this list. Vince Winterling Vineland, NJ -----Original Message----- From: PCBUILD - Personal Computer Hardware discussion List [mailto:[log in to unmask]] On Behalf Of Paul Sent: Monday, May 30, 2005 12:34 PM To: [log in to unmask] Subject: [PCBUILD] Replacement motherboard I am looking for a replacement motherboard for a Dimension 4600. Can't get any info from Dell. The original board failed 3 months after the warranty expired. I'm no expert so will need help. The exsisting board has a Pent 4 Micro-ATX socket 478,2.66G,512,533. Any info will be appreciated. Thanks, Paul PCBUILD maintains hundreds of useful files for download visit our download web page at: http://freepctech.com/downloads.shtml