Memory and Performance
C o m m e n t s t o u c s - d o c f e e d b a ck @ c i s c o . c o m
Supported DIMMs
Table 6 lists the type of DIMMs that Cisco Systems makes available for use with this blade server:
Table 6 | Cisco Systems Supported DIMMs (M1 Models) | |
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Product ID |
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Two DIMMs, each 4 GB | ||
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Two DIMMs, each 8 GB | ||
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Two DIMMs, each 4 GB | ||
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Two DIMMs, each 8 GB | ||
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| Two DIMMs, each 4 GB | |
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Table 7 | Cisco Systems Supported DIMMs (M2 Models) | |
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Product ID |
| Description |
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Two DIMMs, each 4 GB | ||
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Two DIMMs, each 8 GB | ||
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Two DIMMs, each 16 GB | ||
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Cisco does not support
Memory Arrangement
The UCS B230 contains 32 slots for installing DIMMs. Each CPU has 16 DIMM slots organized in pairs. This blade server needs at least one matched pair of DIMMs attached to CPU 1 or CPU 2. Both CPUs can boot and run from a single DIMM pair. DIMM pairs must be identical (the same size, speed, and manufacturer) and are sold in appropriately matched pairs, but one DIMM pair on a CPU can be different from other pairs. DIMMs installed in slots for an absent CPU are not recognized. You should also install memory evenly across the installed CPUs, though it is not a requirement. DIMM slots are color coded blue, white, yellow, and black, and we recommend that you install memory in that order. Each channel pair is identified by a letter: A, B, C, or D for each CPU. Each DIMM pair member is identified by numbers, 0, 1, 2 or 3. You must install additional DIMMs as shown in Table 8.
Table 8 | DIMM Installation Order |
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DIMMs per CPU |
| Numbered slots 1 |
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2 | (Blue) |
| (B0, B1) |
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4 | (Blue) |
| (B0, B1) – (D0, | D1) |
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8 | (Blue, White) |
| (B0, B1) – (D0, | D1) | – (A0, A1) | – (C0, C1) | |
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16 (Blue, white, | (B0, B1) | – (D0, | D1) | – (A0, A1) | – (C0, C1) – | ||
yellow, black) |
| (B2, B3) | – (D2, | D3) | – (A2, A3) | – (C2, C3) | |
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Cisco UCS B230 Blade Server Installation and Service Note
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