An HP customer would like to discuss IBM system advantages. Their current system platform is a partitioned HP rp8400. Which of the following pSeries systems and advantages should be discussed？（）

A.p630. Maximum partitions， maximum storage， I/O bus speed

B.p670. Maximum partitions， maximum memory， number of I/O slots

C.p655. Maximum number of CPUs， processor speed， number of I/O slots

D.p690. Maximum number of CPUs， peak system bandwidth， peak I/O bandwidth