b200 slotThe UCS B200 M5 blade server uses an optional front storage mezzanine module that has two drive bays for hard disks or SSD drives, either 2.5-inch SAS, SATA, orThe UCS B200 M4 is a density-optimized, half-width blade server that supports two CPU sockets for Intel E5-2600 v4 and v3 series CPUs and up to 24 DDR4