HPE ProLiant DL385p Gen8 Memory
Genuine HPE SmartMemory for the HPE ProLiant DL385p Gen8, new and refurbished and tested before shipping. Each AMD Opteron socket carries its own four-channel memory controller with three DIMMs per channel — 12 slots per processor and 24 in a two-processor server — and with one processor installed only half of them are available.
DL385p Gen8 Memory Specifications
- Memory type: HPE SmartMemory DDR3 Registered (RDIMM) and Load Reduced (LRDIMM), one DIMM per option kit
- Slots and channels: 24 total — 12 per processor, 4 channels per processor, 3 DIMMs per channel; install DIMMs only if the matching processor is fitted
- Speed ceiling: every listed Opteron 6300-series processor supports DDR3 to 1600MHz; populated speed runs at 1600, 1333, 1066MHz or lower by configuration
- Module sizes documented: 8GB single-rank and 16GB dual-rank RDIMMs, and 32GB quad-rank LRDIMMs
- Maximum capacity: 768GB from 24 × 32GB LRDIMMs at 800MHz; the RDIMM columns of the bandwidth table top out at 384GB on 16GB modules
- Memory protection: Advanced ECC and Online Spare
Count your processors before you count your slots. Each Opteron socket owns 12 DIMM slots across four channels, so one processor exposes 12 and two expose all 24. Filling every slot puts three DIMMs on each channel, which drops 1600MHz RDIMMs to 1066MHz and 32GB LRDIMMs to 800MHz — the speed at which HPE quotes the 768GB maximum.
How much memory can the DL385p Gen8 hold?
| DIMM | 1 and 2 DIMMs per channel | 3 DIMMs per channel | Maximum in 24 slots |
|---|---|---|---|
| 8GB single-rank RDIMM, PC3-12800R | 1600 MHz | 1066 MHz | 192GB |
| 16GB dual-rank RDIMM, PC3-12800R | 1600 MHz | 1066 MHz | 384GB |
| 16GB dual-rank RDIMM, PC3L-10600R low voltage | 1333 MHz (1066 MHz at 2 per channel on ultra low voltage parts) | 1066 MHz (800 MHz ultra low voltage) | 384GB |
| 32GB quad-rank LRDIMM, PC3L-10600L low voltage | 1333 MHz | 800 MHz | 768GB |
Read the third column before buying for capacity. Filling all 24 slots puts three DIMMs on every channel, which is where this platform gives back clock speed — and the 768GB figure is quoted at 800MHz. Two per channel, sixteen modules across two processors, holds 1600MHz on the standard-voltage RDIMMs and still reaches 256GB on 16GB parts.
Choosing the Right DL385p Gen8 Memory
- The second processor doubles the slots. One CPU exposes 12, two expose all 24, and HPE notes the 384GB RDIMM maximum requires the second processor installed.
- Balance across sockets. HPE recommends balancing capacity between processors and loading channels similarly; population runs A, B, C, alternating CPU1-A, CPU2-A, CPU1-B with two processors fitted.
- Mixing rules: 1.35V and 1.5V RDIMMs may be mixed, but the system powers them all at the higher voltage; mixed speeds are allowed and the server picks a common optimal speed.
- Only LRDIMMs reach 32GB here, so they are the single route to the documented 768GB.
- Background reading: memory rank in HPE servers and why memory speed matters.
Complete Your DL385p Gen8 Build
Pair memory with DL385p Gen8 processors, drives, storage controllers, networking adapters, and power supplies, or the full DL385p Gen8 parts page. Neighbors: DL385 G7 memory, DL385 Gen10 memory, and DL380p Gen8 memory. Catalog-wide: all Gen8 server memory and parts by server model.
DL385p Gen8 Memory FAQ
How much RAM does the HPE ProLiant DL385p Gen8 support?
The QuickSpecs state 768GB, quoted as 24 x 32GB LRDIMMs running at 800MHz. Using Registered DIMMs instead, the supported bandwidth and capacity table tops out at 384GB with 16GB modules.
How many DIMM slots does the DL385p Gen8 have?
Twenty-four - twelve per Opteron processor, across four memory channels per processor at three DIMMs per channel. HPE states plainly that if only one processor is installed, only half the DIMM slots are available.
What type of memory does the DL385p Gen8 use?
HPE SmartMemory DDR3, either Registered (RDIMM) or Load Reduced (LRDIMM). The documented module sizes are 8GB single-rank and 16GB dual-rank RDIMMs and 32GB quad-rank LRDIMMs, and every DDR3 option kit for this server contains one DIMM.
What is the maximum memory speed of the DL385p Gen8?
1600MHz. Unlike the Intel Xeon Gen8 servers, every AMD Opteron 6300-series processor listed for this model supports up to 1600MHz DDR3, so the processor does not change the ceiling - the DIMM type and how many you install do.
Why does my DL385p Gen8 memory run slower when I fill every slot?
Because the third DIMM on a channel forces a step-down. The bandwidth table holds native speed at 1 and 2 DIMMs per channel, then drops 1600MHz RDIMMs to 1066MHz and 32GB LRDIMMs to 800MHz at 3 DIMMs per channel.
Can I use memory from an older HP server in the DL385p Gen8?
No. The QuickSpecs state that HPE memory from previous generation servers is not qualified on the DL385p Gen8, and that HPE SmartMemory is required to realize the performance capabilities the document lists.
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