HP ProLiant SL4540 Gen8 Server - Manual (Page 36)

Hardware options installation 36
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.
Memory configurations
To optimize node availability, the node supports Advanced ECC, which provides up to 4-bit error correction.
This mode is the default option for this node.