P11040-B21: HPE 128GB (1x128GB) Quad Rank x4 DDR4-2933 CAS-21-21-21 Load Reduced Smart Memory Kit
Also listed as: P11040-001, P19402-001, M386AAG40MMB-CVF · made by Samsung
The HPE P11040-B21 is a high-density 128GB quad-rank load-reduced (LRDIMM) DDR4 memory module running at 2933 MT/s with CL21 latency at 1.2V. Engineered for extreme memory capacity virtualization hosts, in-memory databases (SAP HANA), and big data nodes across ProLiant Gen10 platforms powered by 2nd Generation Intel Xeon Scalable CPUs, it leverages buffer chips to mitigate electrical load on memory channels. When buying used LRDIMMs, test all ranks under MemTest86+ and verify no mixing with standard RDIMMs.
Specifications
| Part number | P11040-B21 |
|---|---|
| Brand | HPE |
| Made by | Samsung |
| Type | Memory |
| Other numbers | P11040-001, P19402-001, M386AAG40MMB-CVF |
| Status | current |
| Capacity (GB) | 128 |
| Speed | DDR4-2933 |
| Rank width | 4Rx4 |
| Form factor | 288-pin LRDIMM |
| Generation fit | ProLiant Gen10 servers |
About the P11040-B21
P11040-B21 is HPE's 128GB quad-rank (4Rx4) DDR4-2933 Load-Reduced DIMM (LRDIMM) SmartMemory kit operating at 1.2V with CL21 timings. Designed for memory-intensive mission-critical workloads on HPE ProLiant Gen10 servers, it utilizes memory buffer chips to reduce the electrical loading on the processor's memory bus, allowing systems to support maximum capacities up to 3TB or 6TB per chassis. It is the premier choice for large-scale multi-tenant virtualization, in-memory SAP HANA databases, and massive database analytics clusters.
Compatibility
This 128GB LRDIMM is compatible with 2-socket and 4-socket ProLiant Gen10 systems, including the DL360 Gen10, DL380 Gen10, DL560 Gen10, and DL580 Gen10 equipped with 2nd Generation Intel Xeon Scalable processors (Cascade Lake). When paired with 1st Gen Xeon Scalable processors (Skylake), it operates at 2666 MT/s. Crucially, LRDIMMs CANNOT be mixed with standard registered RDIMMs within the same server; populating an RDIMM alongside this LRDIMM will cause a POST memory configuration error. The option SKU is P11040-B21, with spare numbers P11040-001 and P19402-001.
How to identify a genuine unit
An authentic P11040-B21 is identified by its distinctive physical profile, which features prominent memory buffer ICs between the DRAM chips and the edge pins, alongside an HPE SmartMemory security label and an OEM manufacturer label from Samsung (model M386AAG40MMB-CVF) or Micron. In iLO 5, the module identifies as an authentic HPE SmartMemory 128GB 4Rx4 LRDIMM, reporting full serial number traceability and allowing temperature telemetry to be monitored in HPE Active Health System.
Buying used
Given the high replacement cost of 128GB LRDIMMs, buyers on the secondary market must perform rigorous qualification. Verify that all four ranks on the module register without correctable ECC error spikes under heavy burn-in testing such as MemTest86+ or HPE Smart Storage Administrator diagnostics. Examine the module's edge connector contacts for micro-fractures, and inspect the central buffer chips for signs of localized heat stress or damaged surface-mount solder joints.
Reference prices (last 12 months, updated 2026-10-27)
New: USD 5,793 (1 sighting, Oct 2026)
All sightings
| Seller | Condition | Price | Note | Seen |
|---|---|---|---|---|
| esaitech.com | new | USD 5,793 | new in stock | 2026-10-27 |
Prices seen on public listings on the dates shown, before tax and shipping. Not an offer.
Fits these models
Equivalent part numbers
- Samsung M386AAG40MMB-CVF Samsung OEM 128GB 4Rx4 PC4-2933Y LRDIMM bare module
FAQ
Can P11040-B21 LRDIMMs be mixed with standard RDIMMs?
No, HPE ProLiant servers strictly prohibit mixing LRDIMMs with standard Registered DIMMs (RDIMMs) in the same server.
Buying or selling P11040-B21?
New, refurbished or used. Tell us the quantity and condition and we connect you with a vetted reseller in your region, usually within one working day.
Sources
- HPE DDR4 SmartMemory 128GB 2933MHz LRDIMM Kit, checked 2026-10-27