Model	CPU Type	Max CPU speed (MHz)	Max # CPUs	Max Mem. (GB)	Max. Storage (GB)
E10K	US II	466MHz	64	2 x 64	External Storage only
E12K	US III	1.05/1.2GHz	52	288	External Storage only
E15K	US III	1.05/1.2GHz	106	576	External Storage only
E20K	US IV	1.05GHz	72	288	External Storage only
E25K	US IV	1.05GHz	144	576	External Storage only