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Green printed circuit board with black chips and gold contacts, 288-pin DDR5 DIMM module

HPE

HPE P43331-B21 64GB DDR5 4800 CL40 Registered DIMM server RAM

SKU CH-JEEB-AAT4B MPN P43331-B21

64 GB DDR5-4800 registered DIMM with CL40 latency and 1.10 V operation

  • Total capacity64 GB
  • Rated speedDDR5 4800 (PC5 38400)
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • Memory profilesIntel XMP 3.0
  • 64 GB capacity supports memory-hungry virtualisation workloads
  • DDR5 4800 MT/s delivers high throughput for demanding applications
  • Registered dual-rank design improves signal integrity in dense servers
  • 10 V operation reduces power draw per module
  • 288-pin DIMM form factor fits standard server memory slots

HPE 64GB DDR5 4800 Registered DIMM

This 64GB DDR5 module operates at 4800 MHz with CL40 latency and 1.10 V voltage. It uses a registered 288-pin DIMM format designed for server, rack server and blade server platforms. The dual-rank design supports Intel XMP 3.0 profiles for configured performance.

64GB capacity and dual-rank headroom

A single 64GB module provides substantial capacity for virtualisation, cloud workloads and large database applications. Dual-rank organisation helps maintain throughput at the rated 4800 MHz speed. Systems requiring more total memory must populate additional slots with compatible registered modules.

DDR5 4800 PC5-38400 interface limits

The DDR5-4800 interface delivers PC5-38400 bandwidth within the registered DIMM standard. Registered buffering adds a clock cycle of latency versus unbuffered memory. Maximum usable capacity and channel population depend on the specific server platform memory controller and BIOS support.

How it compares

Measured against everything we stock in ECC Server RAM, at today’s prices. Recalculated every night.

Price $2,087.99
Pricier than about 87% of the 6,523 comparable items (median $188.99).
Total capacity 64 GB
Higher than about 70% of the 6,064 comparable items (median 32 GB).
Price per GB $32.62 per GB
Pricier than about 90% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameHPE
Total capacity64 GB
Product type288-Pin PC RAM
Product colorBlack/Green
Performance
Rated speedDDR5 4800 (PC5 38400)
Memory
CAS latencyCL40
Buffer typeRegistered
Memory profilesIntel XMP 3.0
Power
Rated voltage1.1 V
Size & build
Shipping weight0.05 kg
Package size178 × 83 × 19 mm

Questions about this item

Will this 4800 MHz registered DIMM run at its rated speed in a server that currently uses slower DDR5 modules?

The module operates at 4800 MHz with CL40 latency and 1.10 V. When mixed with slower DDR5, the system typically downclocks all memory to the lowest common speed, so the 4800 MHz rating applies only when every installed DIMM supports it.

How can I confirm the module is running at 4800 MHz with CL40 after installation?

Check the BIOS or UEFI memory information screen; it should report 4800 MT/s, CL40 timings and 1.10 V for this DIMM. Server management tools such as iLO will also display the configured speed and rank configuration.

Does the single 64 GB DIMM ship with any heatsink, cable or additional accessory?

The package contains only the 288-pin registered DIMM itself. No heatsink, cable or extra accessory is included; the module is designed to fit directly into a standard DDR5 DIMM slot on a compatible server motherboard.

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