HPE ProLiant ML350p Gen8 Memory
Genuine HPE SmartMemory DDR3 for the HPE ProLiant ML350p Gen8, new and refurbished. The server carries 24 DIMM slots across four channels per processor, and the first thing to establish is which of the three DDR3 technologies is already in the machine — Registered, Load Reduced and Unbuffered cannot be mixed in one server.
ML350p Gen8 Memory Specifications
- Type: HPE SmartMemory DDR3 as Registered (RDIMM), Load Reduced (LRDIMM) or Unbuffered with ECC (UDIMM), in PC3-14900 (DDR3-1866), PC3-12800 (DDR3-1600) and PC3L-10600 (DDR3-1333) grades
- Slots: 24 in total, four channels per processor and three DIMM slots per channel; with one processor installed, just 12 are available
- Maximum Load Reduced: 768GB, using twenty-four 32GB quad-rank PC3-14900L modules at 1866MHz
- Maximum Registered: 384GB, using twenty-four 16GB dual-rank PC3-14900R modules at 1866MHz
- Maximum Unbuffered: 128GB, and UDIMMs populate no more than 16 of the 24 slots — two per channel is the limit for that type
- Protection modes: Advanced ECC, Online Spare and Lock-step
Three DDR3 technologies, and none of them mix. Load Reduced DIMMs reach 768GB in this server, Registered 384GB, and Unbuffered 128GB across just 16 of the 24 slots. Converting a machine from one type to another means replacing every module in it, so check what is fitted before ordering a single kit — and remember that one processor exposes only 12 slots.
Which DDR3 Type Belongs in Your ML350p Gen8?
| Registered (RDIMM) | Load Reduced (LRDIMM) | Unbuffered (UDIMM) | |
|---|---|---|---|
| Maximum capacity | 384GB | 768GB | 128GB |
| Slots that can be populated | 24 | 24 | 16 |
| Kit sizes stocked | 4GB, 8GB, 16GB | 32GB | 2GB, 4GB, 8GB |
| Three DIMMs per channel | Supported, at reduced speed | Supported, at reduced speed | Not supported |
Capacity is the whole argument for LRDIMMs here: a 32GB quad-rank module is the only route past 384GB, and twenty-four of them fill the server. Registered kits are the sensible middle. Unbuffered exists mainly on entry machines that were bought that way — it reaches barely a third of the registered ceiling and leaves eight slots permanently empty.
Choosing the Right ML350p Gen8 Memory
- Never mix the three technologies. LRDIMM, RDIMM and UDIMM cannot run together, so converting a server from one to another means replacing every module in it.
- Count processors before counting slots. One processor exposes 12 slots; the other 12 need the second CPU, whatever memory you buy.
- The third DIMM per channel costs speed. DDR3-1866 modules hold 1866MHz at one and two DIMMs per channel and drop to 1333MHz at three; DDR3-1600 parts fall to 800MHz at three per channel.
- The processor caps the clock. Only performance E5-2600 v2 parts reach 1866MHz; base v2 parts stop at 1600MHz and E5-2609 v2 and E5-2603 v2 at 1333MHz, while E5-2600 v1 machines top out at 1600MHz.
- Mixed voltages and speed grades are allowed within one type. HPE runs mixed 1.35V and 1.5V modules at the higher voltage and mixed speed grades at a common optimal speed, so a top-up need not match part numbers exactly.
- Every HPE DDR3 option kit here is a single DIMM. A 768GB build is twenty-four kits, not one boxed set.
Complete Your ML350p Gen8 Build
The processor sets the memory ceiling as firmly as the module does — check the ML350p Gen8 processors before paying for 1866MHz kits. Also available: ML350p Gen8 drives, storage controllers, networking adapters and power supplies, or the full ML350p Gen8 parts listing. Background reading: understanding memory rank and the importance of memory speed. Other models: HPE parts by server model.
ML350p Gen8 Memory FAQ
What is the maximum memory in an ML350p Gen8?
768GB, using twenty-four 32GB quad-rank Load Reduced DIMMs at 1866MHz. Registered DIMMs reach 384GB and Unbuffered DIMMs 128GB.
Can I mix RDIMM, LRDIMM and UDIMM in an ML350p Gen8?
No. HPE treats the three as distinct memory technologies that cannot be mixed within a server. Whichever is fitted today is what an upgrade has to match.
How many memory slots does the ML350p Gen8 have?
Twenty-four, arranged as four channels per processor with three DIMM slots per channel. Only 12 are available when a single processor is installed.
Why does my ML350p Gen8 memory run slower than its rating?
Speed falls as the channels fill and is capped by the processor. DDR3-1866 modules hold 1866MHz at one or two DIMMs per channel and drop to 1333MHz at three, and only the performance E5-2600 v2 processors support 1866MHz at all.
How many UDIMMs can an ML350p Gen8 take?
Sixteen of the twenty-four slots. Unbuffered memory is supported at two DIMMs per channel rather than three, which is why its ceiling is 128GB.
Do HPE memory kits for this server contain more than one DIMM?
No. Every DDR3 option kit listed for this server is a single DIMM, so filling all twenty-four slots means twenty-four kits.
✅ Looking for a specific ML350p Gen8 memory module? Browse our full selection below.
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