Cisco Systems UCSSP6C220E, 9266CV-8i DIMM Population Rules, 3-19, Front of Server, CPU1 CPU2

Chapter 3 Maintaining the Server

Installing or Replacing Server Components

Figure 3-12 DIMM Slots and CPUs

Front of Server

C1

C2

D1

D2

B2

B1

A2

A1

G1

G2

H1

H2

F2

F1

E2

E1

CPU1

CPU2

331707

DIMM Population Rules

Observe the following guidelines when installing or replacing DIMMs:

•Each CPU supports four memory channels.

–CPU1 supports channels A, B, C, and D.

–CPU2 supports channels E, F, G, and H.

•Each channel has two DIMM slots (for example, channel A = slots A1 and A2).

–A channel can operate with one or two DIMMs installed.

–If a channel has only one DIMM, populate slot 1 first (the blue slot).

•When both CPUs are installed, populate the DIMM slots of each CPU identically.

–Fill blue slots in the channels first: A1, E1, B1, F1, C1, G1, D1, H1

–Fill black slots in the channels second: A2, E2, B2, F2, C2, G2, D2, H2

•Any DIMM installed in a DIMM socket for which the CPU is absent is not recognized. In a single-CPU configuration, populate the channels for CPU1 only.

	Cisco UCS C220 Server Installation and Service Guide
OL-25760-01		3-19