In a message dated 6/27/01 5:15:23 PM Central Daylight Time, mikeford(a)socal.rr.com writes: << >The last MCA I am aware of ran at 40MHz. Ran stupid fast at that clock I have some DX50 processor complexes, and a couple type 4 that run pentium 90 mhz I think. >> The p90 came in the server500 series. Theoretically, you can swap any CPU complex between the 85,90,95 and server 500 series machines. All you have to do is run the correct ref disk for the type complex you are using. (type 1,2,3 or 4)