Hardware options installation 23
The memory subsystem may be populated with either RDIMMs or UDIMMs, but mixing the two types is not
supported. To determine DIMM characteristics, use the label attached to the DIMM and the following
illustration and table.
Item Description Definition
1 Size —
2 Rank
1R = Single-rank
2R = Dual-rank
4R = Quad-rank
3 Data width
x4 = 4-bit
x8 = 8-bit
4 Memory speed
10600 = 1333-MHz
8500 = 1067-MHz
5 DIMM type
R = RDIMM (registered)
E = UDIMM (unbuffered with ECC)
For the latest supported memory information, see the QuickSpecs on the HP website
(http://www.hp.com
).
UDIMM maximum memory configurations (ML110 G6 servers)
The server supports a maximum of 8 GB using 2-GB dual-rank UDIMMs.
General DIMM slot population guidelines (ML110 G6 servers)
Observe the following guidelines when populating DIMMs:
• Populate DIMM slots for a processor only if the processor is installed.
• Do not mix Unbuffered and Registered PC3 DIMMs.
• Each channel supports up to two Unbuffered DIMMs.
• Single DIMM (non-interleaving) must be installed in slot 2.
• Two DIMMs (interleaving) install in slot 2 and slot 4 for optimal performance.
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