Specifications

Cisco UCS Cisco UCS C220 M4 High-Density Rack Server (Large Form Factor Disk Drive Model)
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SUPPLEMENTAL MATERIAL
Recommended Memory Configuration
This section explains the recommended DIMM population order rules for the C220 M4 server.
■ All DIMMs must be DDR4 DIMMs.
■ Do not mix:
— DIMMs with different clock rates in a channel
— RDIMMs and LRDIMMs
■ There are blue, black, and white DIMM slots. Populate blue slots first.
■ When DIMMs ranks are mixed in the same channel, always populate the highest rank DIMM in
the blue DIMM slot and lower rank DIMM(s) in the black and white DIMM slots.
Many memory configurations are possible. For best results, follow Table 34 when populating 2133-MHz
DIMMs for Intel Xeon E5-2600 v3 CPUs.
Table 34 Recommended Memory Configurations for Intel Xeon E5-2600 v3 CPUs (with 2133-MHz DIMMs)
1
Notes . . .
1. Rows marked in yellow indicate best performance.
Total
System
Memory
Size
CPU 1 DIMMs CPU 2 DIMMs
DIMM Max
Speed
(MHz)
Total
DIMMs
Blue Slots
Slot 1
(A1,B1,
C1,D1)
Black Slots
Slot 2
(A2,B2,
C2,D2)
White Slots
Slot 3
(A3,B3,
C3,D3)
Blue Slots
Slot 1
(E1,F1,
G1,H1)
Black Slots
Slot 2
(E2,F2,
G2,H2)
White Slots
Slot 3
(E3,F3,
G3,H3)
64 GB
4x8 GB — — 4x8 GB — — 2133 8
96 GB
4x8 GB
2
2. Unbalanced configuration (memory not populated equally across the four memory channels). These
configurations are possible but not recommended due to poor performance.
2x8 GB
2
—
2
4x8 GB
2
2x8 GB
2
—
2
2133
12
3x16 GB — — 3x16 GB — — 2133 6
128 GB
4x8 GB 4x8 GB — 4x8 GB 4x8 GB — 2133 16
4x16 GB — — 4x16 GB — — 2133 8
192 GB
4x8 GB 4x8 GB 4x8 GB 4x8 GB 4x8 GB 4x8 GB 1600 24
4x16 GB
2
2x16 GB
2
—
2
4x16 GB
2
2x16 GB
2
—
2
2133 12
4x16 GB 4x8 GB — 4x16 GB 4x8 GB — 2133 16
256 GB
4x16 GB 4x16 GB — 4x16 GB 4x16 GB — 2133 16
4x32 GB — — 4x32 GB — — 2133 8
384 GB
4x16 GB 4x16 GB 4x16 GB 4x16 GB 4x16 GB 4x16 GB 1866 24
512 GB
4x32 GB 4x32 GB — 4x32 GB 4x32 GB — 2133 16
768 GB
4x32 GB 4x32 GB 4x32 GB 4x32 GB 4x32 GB 4x32 GB 1866 24