Datasheet

Cisco UCS B200 M4 Blade Server
14
CONFIGURING the SERVER
■ Select the memory mirroring option (N01-MMIRROR) as shown in Table 4 on page 12.
Caveats
■ System speed is dependent on how many DIMMs are populated per channel and the CPU
DIMM speed support. See
Table 5 for details.
■ The B200 M4 server supports four different memory reliability, availability, and
serviceability (RAS) modes:
— Independent Channel Mode
—Rank Sparing Mode
— Mirrored Channel Mode
— Lockstep Channel Mode
■ Below are the system level RAS Mode combination limitations:
— Mixing of Independent and Lockstep channel mode is not allowed per platform.
— Mixing of Non-Mirrored and Mirrored mode is not allowed per platform.
— Mixing of Lockstep and Mirrored mode is not allowed per platform.
— Mixing of Sparing and Mirrored mode is not allowed per platform.
■ Do not mix RDIMMs with LRDIMMs
■ Do not mix 64GB DDR4-2133-MHz TSV-RDIMMs with any other DIMMs
NOTE: System performance is optimized when the DIMM type and quantity are equal
for both CPUs, and when each populated channel is filled completely equally across
the CPUs in the server.
Table 5 DIMM Memory Speeds with Different CPUs
DIMM Speed DPC
1600-MHz Capable CPU 1866-MHz Capable CPU 2133-MHz Capable CPU
LRDIMM
(QR)
RDIMM
(8R, DR, SR)
LRDIMM
(QR)
RDIMM
(8R, DR, SR)
LRDIMM
(QR)
RDIMM (8R, DR, SR)
2133 DIMM
1
Notes...
1. 2133-MHz DIMMs are the only offered and supported DIMMs for the B200 M4 server
1DPC 1600 1600 1866 1866 2133 2133
2DPC 1600 1600 1866 1866 2133 2133
3DPC 1600 1600 1600 1600 1866 1866
(32 GB RDIMMs and
16 GB DIMMs)
1600
(64 GB TSV RDIMMs,
8 GB RDIMMs)