HPE ProLiant DL80 Gen9 Memory
Genuine HPE DDR4 SmartMemory for the HPE ProLiant DL80 Gen9, new and refurbished. This server carries eight DIMM slots — four per processor, four channels per processor, one DIMM per channel — and it adds a rank rule the rest of the Gen9 line does not: quad rank Registered DIMMs are not supported in a DL80 Gen9 at all.
DL80 Gen9 Memory Specifications
- Type: HPE SmartMemory DDR4 Registered (RDIMM) or Load Reduced (LRDIMM); the two are distinct technologies and cannot be mixed within a server
- Slots: 8 in total, four per processor across four channels at one DIMM per channel; DIMMs 5 to 8 need the second processor installed
- Maximum capacity: 256GB on eight 32GB modules — HPE gives the same figure for Registered and for Load Reduced memory
- Rank rule: quad rank RDIMMs are not supported in the DL80 Gen9, while the 32GB quad rank DDR4-2133 Load Reduced kit is documented to the full 256GB on v3 machines
- Speed grades: DDR4-2400 CAS-17 kits are documented for E5-2600 v4 and DDR4-2133 CAS-15 kits for v3; the processor sets the maximum, so the bank runs at 2400, 2133, 1866 or 1600MHz by model
- Protection modes: Advanced ECC single device data correction, Online Spare, and inter-socket Mirroring with dynamic failover
Read the rank on the label, not just the capacity. Quad rank Registered DIMMs are not supported in a DL80 Gen9 at all, while the 32GB quad rank DDR4-2133 Load Reduced kit is listed for it and reaches the full 256GB. Both technologies stop at that same 256GB.
Registered or Load Reduced in a DL80 Gen9?
| Registered (RDIMM) | Load Reduced (LRDIMM) | |
|---|---|---|
| Maximum capacity | 256GB | 256GB |
| Largest module | 32GB | 32GB |
| Kit sizes stocked | 4GB, 8GB, 16GB, 32GB | 16GB, 32GB |
| Quad rank modules | Not supported in this server | Supported at 32GB on E5-2600 v3 |
| Mixing with the other type | Not supported | Not supported |
Load Reduced memory buys no capacity here. With a largest documented module of 32GB in either technology, both routes land on the same 256GB, and Registered is the cheaper way there and the only one offering 4GB and 8GB kits. The rank rule is what bites at the top of the range: a 32GB quad rank module reaches this server as a Load Reduced part, and a quad rank Registered module will not run at all.
Choosing the Right DL80 Gen9 Memory
- Check which technology is fitted before ordering. Registered and Load Reduced cannot be mixed, so one wrong module means rebuilding the bank rather than losing a little speed.
- Read the rank on the label, not just the capacity. Quad rank Registered modules are excluded by name, which matters most on 32GB parts where both ranks exist.
- Match the kit to the processor family. DDR4-2133 kits are documented for E5-2600 v3 and DDR4-2400 kits for v4 — a 2400MHz kit in a v3 server is money the machine cannot spend.
- There is no population penalty here. With one DIMM per channel there is no second-DIMM step-down to plan around, so filling all eight slots costs no speed.
- Every option kit is a single DIMM. A 128GB build is four 32GB kits or eight 16GB kits, and HPE asks that capacity be balanced across both processors.
Complete Your DL80 Gen9 Build
Memory speed here is set entirely by the processor — read DL80 Gen9 processors before choosing a clock. For the rest of the server, browse DL80 Gen9 drives, storage controllers, networking adapters and power supplies, or the full DL80 Gen9 parts listing. Background reading: understanding memory rank in HPE servers and the importance of memory speed. Other models are listed under HPE parts by server model.
DL80 Gen9 Memory FAQ
What is the maximum memory in a DL80 Gen9?
256GB, reached with eight 32GB modules. HPE documents that same ceiling for Registered and for Load Reduced memory, because the server has only eight slots at one DIMM per channel.
Can I use quad rank memory in a DL80 Gen9?
Only as a Load Reduced module. HPE states plainly that quad rank RDIMMs are not supported in DL80 Gen9 servers, while the 32GB quad rank DDR4-2133 LRDIMM is listed for it and reaches the full 256GB on E5-2600 v3 processors.
How many memory slots does the DL80 Gen9 have?
Eight, arranged as four per processor across four channels with one DIMM per channel. DIMMs 5 to 8 only become available once a second processor is installed.
Should I buy RDIMMs or LRDIMMs for a DL80 Gen9?
Registered, in most cases. Both top out at 256GB here and the largest module of either is 32GB, so Load Reduced memory adds no capacity - buy it to match what is fitted, or for a 32GB quad rank part.
Can I mix RDIMMs and LRDIMMs in a DL80 Gen9?
No. RDIMM and LRDIMM are distinct memory technologies and cannot be mixed within a server. Whichever type is fitted today is what an upgrade has to match.
Why does my DL80 Gen9 memory run below its rated speed?
The processor sets the ceiling. DDR4 speed is the maximum memory speed of the processor installed, so by model the bank runs at 2400, 2133, 1866 or 1600MHz whatever the modules are rated for.
✅ Looking for a specific DL80 Gen9 memory module? Browse our full selection below.
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