HP ProLiant DL20 Gen10 User Manual page 23

Item Item Description Description
6 CAS latency
7 DIMM type
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
Example Example
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)
R = RDIMM (registered)
L = LRDIMM (load reduced)
E = Unbuffered ECC (UDIMM)
https://www.hpe.com/support/DDR4SmartMemoryQS).
DIMM label identification 23