Chapter 3 Maintaining the Server
Installing or Replacing Server Components
DIMM Sockets
Figure 3-13 shows the DIMM sockets on the motherboard.
•Each CPU supports four DDR3 memory channels.
•Channels are labeled with letters as shown in Figure 3-13.
•Each channel has three DIMM sockets. The blue socket in a channel is always socket 1.
Figure 3-13 DIMM and CPU Sockets on the Motherboard
Front of Server
L1 | CPU3 | |
L2 | Channel L | |
L3 | ||
M1 | CPU3 | |
M2 | Channel M | |
M3 | ||
| CPU 3 | |
K3 | CPU3 | |
K2 | ||
Channel K | ||
K1 | ||
J3 | CPU3 | |
J2 | ||
Channel J | ||
J1 | ||
R1 | CPU4 | |
R2 | Channel R | |
R3 | ||
CPU4 | ||
S1 | ||
S2 | Channel S | |
S3 | ||
| ||
| CPU 4 | |
P3 | CPU4 | |
P2 | Channel P | |
P1 | ||
N3 | CPU4 | |
N2 | Channel N | |
N1 |
CPU2 | G1 | |
Channel G | G2 | |
G3 | ||
CPU2 | H1 | |
Channel H | H2 | |
H3 | ||
CPU 2 |
| |
CPU2 | F3 | |
F2 | ||
Channel F | ||
F1 | ||
CPU2 | E3 | |
E2 | ||
Channel E | ||
E1 | ||
CPU1 | C1 | |
Channel C | C2 | |
C3 | ||
CPU1 | ||
D1 | ||
Channel D | D2 | |
D3 | ||
| ||
CPU 1 |
| |
CPU1 | B3 | |
Channel B | B2 | |
B1 | ||
CPU1 | A3 | |
Channel A | A2 | |
A1 |
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| Cisco UCS C420 Server Installation and Service Guide |
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