HP 96GB DDR5-5600 ECC Registered DIMM — P64708-B21

The HP P64708-B21 is a 96GB DDR5-5600 (PC5-44800) ECC Registered DIMM in a dual-rank 2Rx4 configuration, built for HPE ProLiant Gen11 servers. Operating at 1.1V with CL46 latency, it leverages DDR5 on-die ECC and advanced RAS features to deliver the highest DDR5 per-slot capacity for memory-intensive enterprise workloads.

Key Features

• 96GB DDR5 RDIMM — highest-density DDR5 per-slot configuration for Gen11 platforms
• 5600MHz (PC5-44800) for significantly improved bandwidth over DDR4 generations
• DDR5 on-die ECC plus system-level ECC for dual-layer error protection
• 1.1V ultra-low voltage for improved power efficiency in dense server deployments

Product Specifications

• Part Number: P64708-B21
• Manufacturer: HP
• Capacity: 96GB
• Type: DDR5 ECC Registered (RDIMM)
• Speed: 5600MHz (PC5-44800)
• CAS Latency: CL46
• Voltage: 1.1V
• Ranks x Width: 2Rx4
• Pins: 288-pin

Memory Specifications

• Memory Standard: JEDEC DDR5-5600
• Error Correction: On-die ECC + system-level ECC
• Buffer Type: Registered (RDIMM)
• DRAM Generation: DDR5

Performance Specifications

• Peak Bandwidth: ~89.6 GB/s (PC5-44800)
• ECC Type: DDR5 on-die ECC with additional system-level single-bit correction
• RAS Features: Advanced ECC, post-package repair, memory patrol scrubbing (platform dependent)

Use Cases

• HPE ProLiant Gen11 maximum-memory configurations
• In-memory databases (SAP HANA, Oracle IMDB) with 96GB per slot requirements
• AI inference and large language model serving on Gen11 Xeon infrastructure
• High-density VMware and Hyper-V virtualization on DDR5 platforms

Compatibility

• HPE ProLiant DL380 Gen11, DL360 Gen11, DL560 Gen11
• HPE ProLiant ML350 Gen11 and other DDR5-5600 RDIMM Gen11 platforms
• Intel Xeon Scalable 4th/5th Generation (Sapphire Rapids / Emerald Rapids)

Frequently Asked Questions

What is the difference between P64708-B21 and P65256-001?

Both are HP 96GB DDR5-5600 ECC RDIMM modules with identical specifications. P64708-B21 is the option kit part number and P65256-001 is the spare part number — they are functionally equivalent and interchangeable.

Is DDR5 backward compatible with DDR4 slots?

No — DDR5 and DDR4 use different physical connectors and voltage standards. P64708-B21 requires a DDR5-capable server platform such as HPE ProLiant Gen11.

What is on-die ECC in DDR5?

DDR5 includes on-die ECC within each DRAM chip, correcting errors before data leaves the DRAM. This is in addition to the system-level ECC provided by the RDIMM, resulting in two layers of error protection.

The HP P64708-B21 96GB DDR5-5600 RDIMM delivers next-generation memory density and bandwidth for HPE ProLiant Gen11 platforms. Get it in stock today at a competitive price.