HP PROLIANT ML330 G6 User Manual page 16

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
1 Size
2 Rank
3 Data width
4 Memory speed
5 DIMM type
For the latest supported memory information, see the QuickSpecs on the HP website
(http://www.hp.com).
Definition
—
1R = Single-rank
2R = Dual-rank
4R = Quad-rank
x4 = 4-bit
x8 = 8-bit
10600 = 1333-MHz
8500 = 1066-MHz
R = RDIMM (registered)
E = UDIMM (unbuffered with ECC)
Component identification 16