Hardware options installation 36
Memory options
The server memory subsystem supports only UDIMMs.
The server supports dual-rank, PC3-12800E (DDR3) DIMMs operating at a speed of 1600 MT/s.
For more information, see "General DIMM slot population guidelines (on page
38
)."
DIMM identification
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
3R = Three-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)
For the latest supported memory information, see the QuickSpecs on the HP website
(
http://h18000.www1.hp.com/products/quickspecs/ProductBulletin.html
). At the website, choose the
geographic region, and then locate the product by name or product category.
