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Cisco UCS B230 Blade Server Installation and Service Note
OL-23811-01
Memory and Performance
Supported DIMMs
Table 6 lists the type of DIMMs that Cisco Systems makes available for use with this blade server:
Cisco does not support third-party memory DIMMs, and in some cases their use may irreparably damage
the server and require an RMA and down time.
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.
Table6 Cisco Systems Supported DIMMs (M1 Models)
Product ID Description
A02-M308GB3-2 Two DIMMs, each 4 GB DDR3–1333 MHz (Low Voltage supported)
A02-M316GB3-2 Two DIMMs, each 8 GB DDR3–1333 MHz (Low Voltage supported)
A02-M308GD5-2 Two DIMMs, each 4 GB DDR3–1333 MHz
A02-M316GD5-2 Two DIMMs, each 8 GB DDR3–1333 MHz
UCS-MR-2X041RX-C Two DIMMs, each 4 GB DDR3–1333 MHz (Low Voltage supported)
Table7 Cisco Systems Supported DIMMs (M2 Models)
Product ID Description
A02-M308GB3-2 Two DIMMs, each 4 GB DDR3–1333 MHz (Low Voltage supported)
A02-M316GB3-2 Two DIMMs, each 8 GB DDR3–1333 MHz (Low Voltage supported)
A02-M332GD3-2-L Two DIMMs, each 16 GB DDR3–1066 MHz (Low Voltage supported)
Table8 DIMM Installation Order
DIMMs per CPU Numbered slots 1
2 (Blue) (B0, B1)
4 (Blue) (B0, B1) – (D0, D1)
8 (Blue, White) (B0, B1) – (D0, D1) – (A0, A1) – (C0, C1)
16 (Blue, white,
yellow, black)
(B0, B1) – (D0, D1) – (A0, A1) – (C0, C1) –
(B2, B3) – (D2, D3) – (A2, A3) – (C2, C3)