Item Description Example
3 Data width on DRAM
x4 = 4-bit
x8 = 8-bit
x16 = 16-bit
4 Memory generation
PC4 = DDR4
5 Maximum memory speed
2133 MT/s
2400 MT/s
2666 MT/s
2933 MT/s
6 CAS latency
P = CAS 15-15-15
T = CAS 17-17-17
U = CAS 20-18-18
V = CAS 19-19-19 (for RDIMM, LRDIMM)
V = CAS 22-19-19 (for 3DS TSV LRDIMM)
Y = CAS 21-21-21 (for RDIMM, LRDIMM)
Y = CAS 24-21-21 (for 3DS TSV LRDIMM)
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DIMM type
R = RDIMM (registered)
L = LRDIMM (load reduced)
E = Unbuered ECC (UDIMM)
For more information about product features, specifications, options, configurations, and compatibility, see the HPE DDR4
SmartMemory QuickSpecs on the Hewlett Packard Enterprise website (https://www.hpe.com/support/
DDR4SmartMemoryQS).
NVDIMM identification
NVDIMMs are supported only when first-generation Intel Xeon Scalable processors are installed on the server.
NVDIMM boards are blue instead of green. This change to the color makes it easier to distinguish NVDIMMs from DIMMs.
To determine NVDIMM characteristics, see the full product description as shown in the following example:
Component identification
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