Previous Topic

Next Topic

DIMM identification

To determine DIMM characteristics, use the label attached to the DIMM and the following illustration and table.

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

Voltage rating

L = Low voltage (1.35v)
U = Ultra low voltage (1.25v)
Blank or omitted = Standard

5

Memory speed

12800 = 1600-MT/s
10600 = 1333-MT/s
8500 = 1066-MT/s

6

DIMM type

R = RDIMM (registered)
E = UDIMM (unbuffered with ECC)
L = LRDIMM (load reduced)

H = HDIMM (HyperCloud)

For the latest supported memory information, see the QuickSpecs on the HP website. At the website, choose the geographic region, and then locate the product by name or product category.