Cisco UCS B200 M3 Installation Manual page 24

Memory Arrangement
The blade server contains 24 DIMM slots—12 for each CPU. Each set of 12 DIMM slots is arranged into four channels, where each
channel has three DIMMs.
Figure 19: Memory Slots within the Blade Server
1 Channels A-D for CPU 1 2 Channels E-H for CPU 2
DIMMs and Channels
Each channel is identified by a letter—A, B, C, D for CPU1, and E, F, G, H for CPU 2. Each DIMM slot is numbered 0, 1, or 2. Note
that each DIMM slot 0 is blue, each slot 1 is black, and each slot 2 is off-white or beige.
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