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- Description
- Specifications
P64705-B21 is HPE's 16GB (1x16GB) single-rank x8 DDR5-5600 registered Smart Memory kit, timed at CAS-46-45-45 with EC8 error correction. HPE's DDR5 Smart Memory QuickSpecs list it among the registered kits for Intel-based servers and state that 5600 MT/s memory is supported on HPE Gen11 Intel-based servers. AMD-based servers use their own SKUs, so this is not the module for an AMD Gen11 build.
Running speed depends on the platform. HPE notes that memory is limited by the processor's maximum supported speed, and that adding slower DIMMs makes all installed DIMMs run at the slower speed.
The nearest 16GB siblings are P43322-B21 (DDR5-4800, CAS-40-39-39) and P69726-B21 (DDR5-6400, CAS-52-52-52) for Intel, and P50309-B21 (4800) and P64984-B21 (6400) for AMD; P64336-B21 is a 4800 unbuffered kit rather than registered. For more capacity at the same speed, HPE's 32GB dual-rank DDR5-5600 kit is P64706-B21. HPE also lists P64705-K21 with the same specification under its -K21 suffix.
To confirm fit, check the memory section of your server's QuickSpecs for the processor generation and supported DIMM speed, and follow that server's population guidelines.
HPE PartSurfer lists the spare module as P65253-001 (16GB PC5-5600B-R, 2Gx8).
More from this family: HPE RAM.
| P64705-B21 Specs | |
| Option part | P64705-B21 (also listed: P64705-K21) |
| Capacity | 16GB (1 x 16GB) |
| Type | DDR5 registered DIMM (RDIMM), HPE Smart Memory |
| Speed | DDR5-5600 |
| Rank / organization | Single rank, x8 |
| Latency | CAS-46-45-45 |
| Error correction | EC8 |
| Platform | HPE Gen11 Intel-based servers |
| Speed rule | runs at the lower of CPU maximum or slowest installed DIMM |
| 32GB sibling | P64706-B21 (2Rx8 DDR5-5600) |
| Spare part | P65253-001 |