On Saturday 27 August 2005 15:35, Lamar Owen wrote: > By cannibalizing the 5500 and the two 3500's, and by going to the 4MB cache > 400MHz CPU's, I can possibly do 24 CPU's in the 6500 (the Sun Enterprise > EX500 CPU/RAM modules are all the same, the differences between models are > number of slots and enclosure). If the box of CPU's turns out to be mixed > speed, I'd do 14 400MHz/8MB cache CPU's. Probably won't work. The boards you have aren't compatible with the CPUs. Boards come in 83/90 and 100 Mhz versions... If you get a board with 336Mhz cpus, it will run at 83Mhz and the cpus have a clock multiplyer of 4... Adding 400Mhz modules to it will not make a difference - the cpus will report as 400Mhz but the clock speed will show as 336. http://sunsolve.sun.com/handbook_pub/Systems/E6500/components.html#SystemBoard The system handbook has the board part numbers so you can check your boards before you do anything. Peter.