HPE P64705-B21 is the exact ordering identifier covered here, in the DDR5 SmartMemory range. The reviewed specification records capacity: 16 GB (1x16 GB); type: DDR5 RDIMM; speed: 5600 MT/s. Use this guide to decide what to include in a configuration request, rather than treating similar model numbers as interchangeable.
Specifications that define this model
The values below retain the source qualifiers. A missing field is not evidence that a capability is included or absent.
| Specification | Recorded value |
|---|---|
| Capacity | 16 GB (1x16 GB) |
| Type | DDR5 RDIMM |
| Speed | 5600 MT/s |
| Rank | Single Rank x8 |
| Fits | HPE ProLiant DL380 Gen11 |
How to evaluate this exact configuration
Module capacity
Module capacity for P64705-B21: 16 GB (1x16 GB). Calculate the intended total capacity from module quantity, then check the platform's population rules. Module capacity is not the server's maximum memory capacity.
Memory technology
Memory technology for P64705-B21: DDR5 RDIMM. Match the documented memory technology and organisation. A physically similar module, another generation or a different ordering suffix is not automatically an interchangeable part.
Module speed rating
Module speed rating for P64705-B21: 5600 MT/s. Check the installed processor and DIMM population. The module's printed rating does not establish the operating speed of a populated server.
Documented platform scope
Documented platform scope for P64705-B21: HPE ProLiant DL380 Gen11. Check the exact generation, processor, installed memory and population sequence against the manufacturer configuration guide. A platform listing is not approval for every configuration within that family.
Compare nearby ordering codes
| Model | Capacity | Rank | Type |
|---|---|---|---|
| P64705-B21 | 16 GB (1x16 GB) | Single Rank x8 | DDR5 RDIMM |
| P64706-B21 | 32 GB (1x32 GB) | Dual Rank x8 | DDR5 RDIMM |
| P64707-B21 | 64 GB (1x64 GB) | Dual Rank x4 | DDR5 RDIMM |
These are specification comparisons, not statements that the models are drop-in replacements. Compare the configuration limits before choosing an alternative.
P64706-B21 manufacturer reference · P64707-B21 manufacturer reference
Questions before you request a quote
Which product does P64705-B21 identify?
It identifies HPE DDR5 SmartMemory 16GB DDR5-5600 RDIMM. Keep P64705-B21 on the requirement and quote; a family name alone does not fix the ordering configuration.
What compatibility scope is recorded for P64705-B21?
The recorded scope is HPE ProLiant DL380 Gen11. Confirm the exact machine generation and configuration in the manufacturer guide; this is not a blanket compatibility promise.
What should I check before ordering P64705-B21?
Start with the specification and configuration checks above, then state the quantity, destination and intended connections or platform. Ask for the exact contents of the offered configuration and identify every proposed substitution separately.
Build a clear requirement
Specify P64705-B21, quantity and delivery country, then add the configuration information discussed above. Keep accessories and any accepted alternative as separate lines. Request current pricing and availability rather than relying on an article for live commercial information.
View the P64705-B21 product listing · Browse HPE memory · Request a quote
For the wider selection process, read the related buying guide.
Sources and scope
Document and identifier checks: 2026-10-17. Prepared from manufacturer documentation and the catalogue's recorded specifications; no hands-on benchmark is claimed. Confirm destination-specific options and configuration eligibility against the source documents. Prices, stock, delivery dates and coverage terms are not established by this guide.