! The 21064 should work in a PC64 and the 21164 should work in either an ! EB164 or PC164. I've got extra PC64, EB164, and PC164 ! motherboards but ! you're overseas so finding one nearer to you would probably ! be cheaper. ! -- ! Eric Dittman Eric --- Here's a copy of a message I sent out a little while ago, didn't get any real info responses... If my procs would work in the PC64, could I get my hands on one (or two)? Would the PC64 fit in the AS200 case? If you have any other info too, that would be appreciated. THanks in advance... ... I have here a pair of EV4 21064 200MHz CPUs, p/n 21-35023-21. One was from an AlphaStation 200 4/100, (dead power supply, m/b seems to be dead), apparently an upgrade... I was wondering if there is a dual-processor motherboard I could use these on (and where to find one), or what other machines I could use them in... In my DEC3000 System Programmer's Reference, it says the DEC 3000/500X uses the 200MHz 21064. I assume this is the same (as I have above). If so, I could bump my 3000/400 from 133 MHz to 200MHz, right? Would any jumpers need to be changed? But a dual 200MHz motherboard would be a little more fun... --- David A Woyciesjes --- C & IS Support Specialist --- Yale University Press --- mailto:david.woyciesjes@yale.edu --- (203) 432-0953 --- ICQ # - 905818