HP 128GB 4800MHz DDR5 PC5-38400 ECC Registered CL40 288-Pin DIMM 1.1V Dual Rank x4 Memory Module – P69982-B21

HPE P69982-B21 128GB DDR5-4800 ECC RDIMM — 2Rx4 Server Memory

The HPE P69982-B21 is a 128GB DDR5-4800 ECC Registered DIMM providing dual-rank x4 server memory for HPE ProLiant Gen11 servers — delivering CL40 latency at 4800MHz (PC5-38400) with 1.1V operation and on-die ECC. The standard HPE option kit (-B21) variant of P71560-001, providing the same maximum 128GB DDR5 per-slot capacity for HPE Gen11 channel and reseller procurement.

Key Features

• 128GB DDR5-4800 ECC RDIMM — 2Rx4 for maximum per-slot DDR5 capacity on HPE Gen11
• CL40 latency at 4800MHz — high-bandwidth DDR5 server memory at 128GB density
• 1.1V low-voltage operation for energy-efficient 128GB DDR5 per-slot deployment
• On-die ECC plus registered buffer for dual-layer DDR5 error protection
• HPE option kit (-B21) for standard HPE channel and reseller ordering

Product Specifications

• Part Number: P69982-B21
• Manufacturer: HP / HPE
• Capacity: 128GB
• Type: DDR5 ECC Registered DIMM (RDIMM)
• Speed: 4800MHz (PC5-38400)
• CAS Latency: CL40
• Voltage: 1.1V
• Ranks x Width: 2Rx4
• Pins: 288-Pin

Memory Specifications

• ECC: Yes — On-Die ECC + ECC Registered
• Form Factor: DIMM (288-pin, DDR5)
• Error Correction: On-die ECC plus SECDED at memory controller
• Memory Standard: PC5-38400 (DDR5-4800)

Performance Specifications

• Bandwidth: Up to 38,400 MB/s theoretical peak per channel
• ECC Type: On-Die ECC (ODECC) + Registered SECDED
• RAS Features: On-die ECC, memory mirroring, sparing (platform dependent)

Use Cases

• HPE channel/reseller option kit procurement for 128GB DDR5-4800 RDIMM on Gen11
• Maximum 128GB DDR5 per-slot capacity for HPE Gen11 SAP HANA and AI workloads
• High-bandwidth large-capacity memory for virtualization and in-memory databases on Gen11
• Interchangeable with P71560-001 in supported HPE ProLiant Gen11 servers

Compatibility

• HPE ProLiant Gen11 servers with DDR5 DIMM slots supporting 128GB RDIMM per slot
• Requires Intel Xeon Scalable 4th Gen (Sapphire Rapids) or AMD EPYC 9004 series processors
• Not compatible with DDR4 DIMM slots — DDR5 uses incompatible 288-pin keying
• Verify HPE Gen11 server QuickSpecs for 128GB DDR5 RDIMM slot support before ordering

Frequently Asked Questions

What is the difference between P69982-B21 and P71560-001?

Both are identical 128GB DDR5-4800 ECC RDIMMs at 2Rx4, CL40, 1.1V for HPE ProLiant Gen11. P69982-B21 is the standard HPE option kit (-B21) for channel/reseller ordering, while P71560-001 is the HPE factory/OEM (-001) variant. Both are fully interchangeable in supported HPE Gen11 servers.

Is 128GB DDR5 RDIMM available without LRDIMM buffering?

Yes — unlike DDR4 where 128GB required 8Rx4 LRDIMM buffering, DDR5”s higher DRAM die density enables 128GB in a standard 2Rx4 RDIMM without Load Reduced DIMM architecture. This simplifies the memory subsystem, reduces latency versus LRDIMM, and broadens compatibility to servers that support RDIMM but not LRDIMM configurations.

What power savings does DDR5-4800 provide over DDR4-2666 at equivalent capacity?

DDR5 operates at 1.1V versus DDR4”s 1.2V, reducing per-DIMM power consumption. Additionally, DDR5”s higher bandwidth means fewer DIMMs may be needed to achieve the same memory throughput, further reducing total system memory power. For 128GB capacity, DDR5 RDIMM (2Rx4) also eliminates the LRDIMM data buffer”s power overhead compared to DDR4 LRDIMM.

The HPE P69982-B21 delivers 128GB DDR5-4800 ECC RDIMM capacity in a 2Rx4 configuration under the standard HPE option kit part number — providing maximum DDR5 per-slot memory density for HPE ProLiant Gen11 channel procurement, enabling SAP HANA, AI inference, and large-scale virtualization at DDR5 bandwidth levels without the LRDIMM complexity required for equivalent DDR4 capacity.