Datasheet

Cisco UCS C240 M3 High-Density Rack Server (Small Form Factor Disk Drive Model)
64
SUPPLEMENTAL MATERIAL
CPUs and DIMMs
Physical Layout
Each CPU has four DIMM channels:
■ CPU1 has channels A, B, C, and D
■ CPU2 has channels E, F, G, and H
Each DIMM channel has three banks: bank 1, 2, and 3. The blue-colored DIMM slots are for bank 1 and the
black-colored are for banks 2 and 3.
As an example, DIMM slots A1, B1, C1, and D1 belong to bank 1, while A2, B2, C2, and D2 belong to bank 2.
Figure 8 shows how banks and channels are physically laid out on the motherboard. The DIMM slots on the
top (channels A, B, C, and D) are associated with CPU 1, while the DIMM slots on the bottom (channels E, F,
G, and H) are associated with CPU 2. The bank 1 (blue) DIMM slots are always located farther away from a
CPU than the corresponding bank 2 or 3 (black) slots. Bank 1 slots (blue) are populated before bank 2 and 3
slots (black).
8 SCU upgrade ROM header 18 Power supplies (two, hot-swappable
access through rear panel)
9 Integrated RAID on motherboard, and mini-SAS
connectors
19 Supercap RAID data cache power backup
unit mounting locations (two, on air baffle
not shown in this view)
10 Software RAID key header 20 GPU-ready power connector