Here's the official Slot A info
http://www.cpu-world.com/CPUs/K7/TYP...Slot%20A).html
Your best bet is to buy a board and CPU combo on Ebay- if you are are sure you want to play around with a Slot A system. I can tell you they need lots of cooling and you need to have some really quiet running fans or the noise level is a lot different than the Pentium 4's you may be used to.