Hi Jim, All K6-2 CPU's can be "underclocked" to run lower multiplier settings, so any of the new processors well work as long as the processor voltage settings a correct. But best of all, you get a K6-2 550Mhz (or better yet, a K6-2+) and set your board multiplier to x2. The CPU reads this as x6 and is now "overclocked" to 600Mhz! These seem to work quite well. Not bad for a free computer... Michael Jim Danvers <[log in to unmask]> wrote: Hello... A: Brand new to this list- 1st posting - HELLO!! B: Question about slapping in an AMD cpu on an older shuttle mainboard. I have a client that I have done some work for in the past who asked me if was interested in an old machine that she was going to (literally) throw away. I accepted and gave it a home. It has an older Shuttle "HOT-591P" mainboard in it. I went to the web site for the mfg of the board and obtained a .pdf file of the documentation for it - it states that this board can accept up to 400mhz amd k62 cpu's. I am having a tough time finding one this "slow". :( Just wondering - anyone know if perhaps the documentation for this board is simply indicative of the time that it was written (400+ cpu's didn't exist yet) and that perhaps it ~could~ accept a 500 or faster cpu. k62 500's are plentiful! Anyone have any experience or know anything about this particular board. I'm figuring that for 50'ish dollars, I can more that triple the processor speed - and that'd be my total investment into this little box. :) TIA... -=- J.D. -=- ____________________________________________________________________ Get your own FREE, personal Netscape WebMail account today at http://home.netscape.com/webmail PCBUILD maintains hundreds of useful files for download visit our download web page at: http://nospin.com/pc/files.html