HP ProLiant SL270s HP ProLiant SL270s Gen8 Server User Guide - Page 33
DIMM identification, Memory configurations, Description, Definition
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DIMM identification 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 Voltage rating 5 Memory speed 6 DIMM type Definition - 1R = Single-rank 2R = Dual-rank 4R = Quad-rank x4 = 4-bit x8 = 8-bit L = Low voltage (1.35v) U = Ultra low voltage (1.25v) Blank or omitted = Standard 12800 = 1600-MT/s 10600 = 1333-MT/s 8500 = 1066-MT/s 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 server availability, the server supports the following AMP modes: • Advanced ECC-Provides up to 4-bit error correction and enhanced performance over Lockstep mode. This mode is the default option for this server. • Online spare memory-Provides protection against failing or degraded DIMMs. Certain memory is reserved as spare, and automatic failover to spare memory occurs when the system detects a DIMM that Hardware options installation 33