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- Description
- Specifications
This is HPE's 32GB DDR5 unbuffered memory kit: one dual-rank x8 UDIMM rated at 4800 MT/s with CAS-40-39-39 timing. HPE's DDR5 QuickSpecs lists it among the unregistered memory kits for Intel-based servers, under the Standard Memory name rather than Smart Memory. PartSurfer lists the service spare as P64634-001 (32GB PC5-4800B-E, 2Gx8).
Unbuffered DIMMs are used in HPE's entry single-socket servers. PartSurfer shows the spare in factory ProLiant DL20 Gen11 and ML30 Gen11 configurations and in the kit itself. These servers do not take registered (RDIMM) DDR5, so registered kits such as P43322-B21 will not work here, and this UDIMM will not work in RDIMM servers like the DL360 or DL380 Gen11.
The 16GB single-rank sibling is P64336-B21. The actual memory speed depends on the processor and the number of DIMMs per channel, so check the server's QuickSpecs before planning speeds.
Before mixing with existing memory, compare the spare number on the installed DIMMs.
More from this family: HPE RAM.
| P64339-B21 Specs | |
| Option part number | P64339-B21 |
| Spare part number | P64634-001 |
| Capacity | 32GB (1 x 32GB) |
| Type | DDR5 unbuffered (UDIMM), HPE Standard Memory |
| Speed | DDR5-4800 (PC5-4800B-E) |
| Rank and width | Dual rank x8 |
| CAS latency | 40-39-39 |
| Organization (PartSurfer) | 2Gx8 |
| Servers (PartSurfer) | ProLiant DL20 Gen11, ML30 Gen11 |
| Sibling | 16GB P64336-B21 |