HPE Server Memory Configurator: DL360 and DL380 Gen10, Gen11
Pick the server, the processor and the HPE memory kits. The configurator checks the plan against HPE’s published population rules, shows which slots to fill, and works out the memory speed and the most memory the processor can address. Every rule links back to an HPE document.
The interactive configurator on this page takes the server model (DL360 or DL380, Gen10 or Gen11), the processor model and count, and one HPE memory kit or a mix of two, then checks the plan against HPE's population rules and shows the slots to fill, the memory speed and the per-processor limit. The rules and tables below are the ones it applies.
Examples, checked against HPE’s rules
- DL380 Gen11, 2 × Xeon Gold 6448Y, 8 × 64 GB DDR5-4800 per processor: 1 TB at 4800 MT/s, one DIMM on every channel. Slots 1, 3, 5, 7, 10, 12, 14, 16 of each processor.
- Same server, 16 per processor: 2 TB, but two DIMMs per channel drop the speed to 4400 MT/s.
- Gen11 with 10 DIMMs per processor: not supported. HPE lists only 1, 2, 4, 6, 8, 12 or 16 DIMMs per processor; other counts “may not boot”.
- DL380 Gen10, 2 × Gold 6248R, 12 × 32 GB per processor: 768 GB at 2933 MT/s. Going to 12 × 128 GB (1.5 TB per processor) needs an “M” or “L” processor: the 6248R addresses 1 TB per socket.
- Gen10 with 8 DIMMs per processor is balanced but uses only 4 of 6 channels: HPE measures 66.67% of peak throughput, less than with 6 DIMMs.
Rules and tables come from HPE’s memory population white papers and the server QuickSpecs (listed under Sources). The configurator covers HPE SmartMemory kits only; third-party memory is not checked.
Gen11 DL360 / DL380: DIMM population order per processor
| DIMMs per processor | Slots to fill | Throughput vs peak (best / worst) |
|---|---|---|
| 1 | 10 | 12.5% / 12.5% |
| 2 | 3, 10 | 25% / 25% |
| 4 | 3, 7, 10, 14 | 50% / 50% |
| 6 | 3, 5, 7, 10, 14, 16 | 75% / 75% |
| 8 | 1, 3, 5, 7, 10, 12, 14, 16 | 100% / 100% |
| 12 | 1, 2, 3, 5, 6, 7, 10, 11, 12, 14, 15, 16 | 100% / 50% |
| 16 | 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 | 100% / 100% |
Same order for 4th and 5th Gen Xeon. Any other count is not supported (HPE: “the server may not boot”). With 2 processors, use the same count on each. 5th Gen: 96 GB DIMMs are not supported at 2 or 4 per processor; 4th Gen: 96 GB only at 8 or 16.
Gen10 DL360 / DL380: DIMM population order per processor
| DIMMs per processor | Slots to fill | Balanced | Throughput vs peak (largest / smallest region) |
|---|---|---|---|
| 1 | 8 | Yes | 16.67% / 16.67% |
| 2 | 8, 10 | Yes | 33.33% / 33.33% |
| 3 | 8, 10, 12 | Yes | 50% / 50% |
| 4 | 3, 5, 8, 10 | Yes | 66.67% / 66.67% |
| 5 | 3, 5, 8, 10, 12 | No | 66.67% / 16.67% |
| 6 | 1, 3, 5, 8, 10, 12 | Yes | 100% / 100% |
| 7 | 1, 3, 5, 7, 8, 10, 12 | No | 100% / 16.67% |
| 8 | 3, 4, 5, 6, 7, 8, 9, 10 | Yes | 66.67% / 66.67% |
| 9 | 1, 3, 5, 7, 8, 9, 10, 11, 12 | No | 100% / 50% |
| 10 | 1, 3, 4, 5, 6, 7, 8, 9, 10, 12 | No | 100% / 66.67% |
| 11 | 1, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 | No | 100% / 16.67% |
| 12 | 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 | Yes | 100% / 100% |
Unbalanced counts boot, but part of the memory runs much slower. 6 or 12 per processor uses all six channels.
HPE memory speed by processor and DIMMs per channel (MT/s)
| Processor | 1 DIMM per channel | 2 DIMMs per channel |
|---|---|---|
| 5th Gen Platinum 85xx | 5600 | 4400 |
| 5th Gen Gold 65xx | 5200 | 4400 |
| 5th Gen Gold 55xx | 4800 | 4400 |
| 5th Gen Silver 45xx / Bronze 35xx | 4400 | 4400 |
| 4th Gen Platinum 84xx / Gold 64xx | 4800 | 4400 |
| 4th Gen Gold 54xx | 4400 | 4400 |
| 4th Gen Silver 44xx / Bronze 34xx | 4000 | 4000 |
| 2nd Gen Platinum 82xx / Gold 62xx | 2933 | 2933 |
| 2nd Gen Gold 52xx | 2666 | 2666 |
| 2nd Gen Silver 42xx | 2400 | 2400 |
| 2nd Gen Bronze 32xx | 2133 | 2133 |
Some processors are slower than their family row (for example Gold 6430: 4400 MT/s; Platinum 8592V: 4800 MT/s); the configurator uses the lower figure. 1st Gen Xeon (x1xx): up to 2666 MT/s for Platinum and Gold 61xx/5122, 2400 for Gold 51xx and Silver, 2133 for Bronze.
Maximum memory with 2 processors
| Server | Processor | Most memory | Limit |
|---|---|---|---|
| DL360 / DL380 Gen10 | 1st Gen (e.g. Gold 6130) | 1.5 TB | 768 GB per processor |
| DL360 / DL380 Gen10 | 1st Gen “M” (e.g. Platinum 8180M) | 3 TB | 24 × 128 GB |
| DL360 / DL380 Gen10 | 2nd Gen (e.g. Gold 6248R) | 2 TB | 1 TB per processor |
| DL360 / DL380 Gen10 | 2nd Gen “M” or “L” (e.g. 6240M, 6240L) | 3 TB | 24 × 128 GB |
| DL360 / DL380 Gen11 | any 4th or 5th Gen | 8 TB | 32 × 256 GB (4 TB per processor) |
DL380 Gen11 with the 24SFF drive cage: at most 16 DIMMs in total (HPE QuickSpecs).
Gen11 kits for 5th Gen Xeon (DDR5-5600)
| HPE part | Capacity | Ranks | Type | Speed |
|---|---|---|---|---|
| P64705-B21 | 16 GB | 1Rx8 | RDIMM | DDR5-5600 |
| P64706-B21 | 32 GB | 2Rx8 | RDIMM | DDR5-5600 |
| P64707-B21 | 64 GB | 2Rx4 | RDIMM | DDR5-5600 |
| P64708-B21 | 96 GB | 2Rx4 | RDIMM | DDR5-5600 |
| P69976-B21 | 128 GB | 2Rx4 | RDIMM | DDR5-5600 |
| P64709-B21 | 128 GB | 4Rx4 | 3DS RDIMM | DDR5-5600 |
| P64710-B21 | 256 GB | 8Rx4 | 3DS RDIMM | DDR5-5600 |
| P90554-B21 | 256 GB | 4Rx4 | 3DS RDIMM | DDR5-5600 |
Gen11 kits for 4th Gen Xeon (DDR5-4800)
| HPE part | Capacity | Ranks | Type | Speed |
|---|---|---|---|---|
| P43322-B21 | 16 GB | 1Rx8 | RDIMM | DDR5-4800 |
| P43325-B21 | 32 GB | 1Rx4 | RDIMM | DDR5-4800 |
| P43328-B21 | 32 GB | 2Rx8 | RDIMM | DDR5-4800 |
| P43331-B21 | 64 GB | 2Rx4 | RDIMM | DDR5-4800 |
| P66675-B21 | 96 GB | 2Rx4 | RDIMM | DDR5-4800 |
| P69974-B21 | 128 GB | 2Rx4 | RDIMM | DDR5-4800 |
| P43334-B21 | 128 GB | 4Rx4 | 3DS RDIMM | DDR5-4800 |
| P43337-B21 | 256 GB | 8Rx4 | 3DS RDIMM | DDR5-4800 |
| P90550-B21 | 256 GB | 4Rx4 | 3DS RDIMM | DDR5-4800 |
Gen10 kits for 2nd Gen Xeon (DDR4-2933)
| HPE part | Capacity | Ranks | Type | Speed |
|---|---|---|---|---|
| P00918-B21 | 8 GB | 1Rx8 | RDIMM | DDR4-2933 |
| P00920-B21 | 16 GB | 1Rx4 | RDIMM | DDR4-2933 |
| P00922-B21 | 16 GB | 2Rx8 | RDIMM | DDR4-2933 |
| P00924-B21 | 32 GB | 2Rx4 | RDIMM | DDR4-2933 |
| P00930-B21 | 64 GB | 2Rx4 | RDIMM | DDR4-2933 |
| P00926-B21 | 64 GB | 4Rx4 | LRDIMM | DDR4-2933 |
| P00928-B21 | 128 GB | 8Rx4 | 3DS LRDIMM | DDR4-2933 |
| P11040-B21 | 128 GB | 4Rx4 | LRDIMM | DDR4-2933 |
Gen10 kits for 1st Gen Xeon (DDR4-2666)
| HPE part | Capacity | Ranks | Type | Speed |
|---|---|---|---|---|
| 815097-B21 | 8 GB | 1Rx8 | RDIMM | DDR4-2666 |
| 815098-B21 | 16 GB | 1Rx4 | RDIMM | DDR4-2666 |
| 835955-B21 | 16 GB | 2Rx8 | RDIMM | DDR4-2666 |
| 815100-B21 | 32 GB | 2Rx4 | RDIMM | DDR4-2666 |
| 815101-B21 | 64 GB | 4Rx4 | LRDIMM | DDR4-2666 |
| 815102-B21 | 128 GB | 8Rx4 | LRDIMM | DDR4-2666 |
HPE: DDR4-2933 kits are supported only with 2nd Gen processors and DDR4-2666 kits only with 1st Gen. On Gen11, DDR5-4800 kits go with 4th Gen and DDR5-5600 kits with 5th Gen.
How the configurator checks a plan
It applies HPE’s rules in this order, and stops at the first one that fails:
1. The processor is in HPE’s list for that server, and a single-socket processor (Gen10 “U” models; Gen11 6414U, 8558U, 8581V, 3508U, 3408U, 5411N, 6421N) is not paired. 2. The memory kit matches the processor generation (DDR4-2666 ↔ 1st Gen, DDR4-2933 ↔ 2nd Gen, DDR5-4800 ↔ 4th Gen, DDR5-5600 ↔ 5th Gen). 3. The DIMM count fits the slots: 12 per processor on Gen10, 16 on Gen11. 4. A mix of two kits is one HPE allows. 5. Gen11: the count per processor is one HPE lists (1, 2, 4, 6, 8, 12 or 16). 6. The memory per processor is within the processor’s limit.
Then it fills the slots in HPE’s order and works out the speed: the lowest of HPE’s speed for that processor family at the number of DIMMs per channel, the processor’s own maximum, and the DIMM’s rated speed.
Gen11: only seven DIMM counts are supported
HPE’s Gen11 population rules list 1, 2, 4, 6, 8, 12 or 16 DIMMs per processor and state that configurations not listed are not supported and the server may not boot. Unlike Gen10, there is no “unbalanced but works” middle ground. Twelve per processor is supported but gives two interleave regions: HPE rates the worst at 50% of peak throughput. For full bandwidth use 8 (one per channel) or 16 (two per channel, at a lower speed).
Gen10: any count boots, but not all are balanced
Gen10 servers accept 1 to 12 DIMMs per processor. Counts of 5, 7, 9, 10, 11 are unbalanced: memory splits into interleave regions of different speed, and HPE measures as little as 16.67% of peak in the slowest one. Six per processor (one per channel) or twelve (two per channel) give full throughput. Eight per processor is balanced but uses only 4 of the 6 channels: 66.67% of peak.
One DIMM or two per channel: the speed trade-off
On Gen11 the second DIMM in a channel lowers the speed for Platinum and Gold 6xxx processors: 4th Gen from 4800 to 4400 MT/s, 5th Gen Platinum from 5600 to 4400 MT/s. Gen10 SmartMemory keeps its speed at two DIMMs per channel. The whole server runs at one speed: the slowest DIMM or processor limit sets it for every channel.
Mixing two kinds of DIMM
Gen11 allows only these mixes, and only with all 16 slots per processor filled (8 of each, the higher-rank kit in the white slots): P43322-B21 + P43328-B21; P43325-B21 + P43331-B21; P43334-B21 + P43337-B21; P64705-B21 + P64706-B21; P64709-B21 + P64710-B21. Every other pair, including any mix with 96 GB DIMMs, is not supported. Gen10 is more flexible: RDIMMs of different ranks and x4/x8 widths can share a channel (higher rank in the white slot), but RDIMMs and LRDIMMs never mix, the 128 GB 8R LRDIMM mixes with nothing, and the 128 GB 4R LRDIMM only with the 64 GB 4R LRDIMM. The configurator lays out mixes as a full population; for other mixes, ask us for a checked layout.
Memory per processor and “M” / “L” processors
On Gen10 the processor sets the ceiling: 1st Gen Xeon Scalable addresses 768 GB per socket (1.5 TB for “M” models); 2nd Gen addresses 1 TB (2 TB for “M”, 4.5 TB for “L”). A plan above the limit will not work with that processor, whatever the slots allow. Every Gen11 processor HPE lists for these servers supports up to 4 TB per processor.
What this tool does not cover
Gen10 Plus servers, Xeon Max (HBM) processors, Intel Optane persistent memory and NVDIMMs, memory mirroring and sparing modes, other server models and third-party memory. For those, send us the server serial number or configuration and we will check it.
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Frequently asked questions
What is the maximum memory in an HPE ProLiant DL380 Gen10?
3 TB (24 × 128 GB LRDIMMs) with two 2nd Gen “M” or “L” processors. A standard 2nd Gen processor addresses 1 TB, so two give 2 TB; 1st Gen standard processors address 768 GB each. The DL360 Gen10 has the same limits.
What is the maximum memory in a DL380 Gen11 or DL360 Gen11?
8 TB: 32 × 256 GB RDIMMs, 4 TB per processor. The DL380 Gen11 with the 24SFF drive cage takes at most 16 DIMMs.
Can I install 3, 5 or 10 DIMMs per processor in a Gen11 server?
No. HPE supports 1, 2, 4, 6, 8, 12 or 16 DIMMs per processor in Gen11 DL360/DL380 servers; other counts are not supported and the server may not boot.
Will DDR4-2933 memory work with a 1st Gen Xeon in a DL380 Gen10?
HPE’s QuickSpecs say DDR4-2933 kits are supported only with 2nd Gen Xeon Scalable processors, and DDR4-2666 kits only with 1st Gen. Use the kit that matches the processor.
Can I use DDR5-4800 memory with 5th Gen Xeon in a Gen11 server?
HPE lists DDR5-4800 kits for 4th Gen Xeon only; 5th Gen processors support DDR5-5600 (PC5-5600B) kits. 5th Gen processors also need the newer system board: HPE does not support a field upgrade from 4th to 5th Gen.
How fast will memory run with two DIMMs per channel?
It depends on the processor. 4th Gen Platinum and Gold 64xx: 4800 MT/s with one DIMM per channel, 4400 with two. 5th Gen Platinum: 5600 and 4400. 2nd Gen Platinum/Gold 6xxx on Gen10: 2933 at both.
Can I mix different HPE memory part numbers?
On Gen11, only three pairs per generation family are allowed, and only with all 16 slots per processor filled. On Gen10, RDIMMs of different capacities and ranks can be mixed (higher rank in the white slot), but never RDIMMs with LRDIMMs.
Sources
- HPE: Server memory population rules for HPE Gen11 servers with 4th Gen Intel Xeon Scalable processors (a50007437ENW) (accessed 2026-10-23)
- HPE: Server memory population rules for HPE Gen11 servers with 5th Gen Intel Xeon Scalable processors (a50010242ENW) (accessed 2026-10-23)
- HPE: Server Memory and Persistent Memory population rules for HPE Gen10 servers with Intel Xeon Scalable processors (a00017079ENW) (accessed 2026-10-23)
- HPE: HPE ProLiant DL380 Gen11 QuickSpecs (a50004307ENW) (accessed 2026-10-23)
- HPE: HPE ProLiant DL360 Gen11 QuickSpecs (a50004306ENW) (accessed 2026-10-23)
- HPE: HPE ProLiant DL380 Gen10 Server QuickSpecs (a00008180ENW) (accessed 2026-10-23)
- HPE: HPE ProLiant DL360 Gen10 Server QuickSpecs (a00008159ENW) (accessed 2026-10-23)
- HPE: HPE DDR4 SmartMemory product information reference (a00018945en_us) (accessed 2026-10-23)
Related tools and guides
Updated 2026-10-23.