HP ProLiant DL288 HP ProLiant DL288 G6 Server Maintenance and Service Guide - Page 86

DIMM identification, IMPORTANT, Description, Definition

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DIMM identification IMPORTANT: This server does not support mixing RDIMMs and UDIMMs. Attempting to mix these two types causes the server to halt during BIOS initialization. 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. Figure 52 DIMM identification Item Description 1 Size 2 Rank 3 Data width 4 Memory speed 5 DIMM type Definition - 1R = Single-rank 2R = Dual-rank 4R = Quad-rank x4 = 4-bit x8 = 8-bit 10600 = 1333-MHz 8500 = 1067-MHz R = RDIMM (registered) E = UDIMM (unbuffered with ECC) Removal and replacement procedures 82

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Removal and replacement procedures
82
DIMM identification
IMPORTANT:
This server does not support mixing RDIMMs and UDIMMs. Attempting to mix these
two types causes the server to halt during BIOS initialization.
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.
Figure 52
DIMM identification
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)