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Green 288-pin DDR5 RDIMM module with black chips and silver heatsink

HPE

HPE P50312-B21 64GB DDR5 4800 ECC Registered RDIMM server RAM

SKU CH-0T84-EG6G9 MPN P50312-B21

64GB DDR5 4800 ECC registered RDIMM with CL40 timing at 1.10V for server workloads

  • Total capacity64 GB
  • Rated speedDDR5 4800 (PC5 38400)
  • CAS latencyCL40
  • Memory timings40-39-39
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • High-density 64GB capacity supports large server workloads
  • DDR5 4800 speed delivers high data throughput
  • ECC Registered design detects and corrects memory errors
  • Low 1.10V voltage reduces power consumption per module
  • CL40 CAS latency with 40-39-39 timing optimises response time

64GB DDR5 4800 ECC RDIMM for servers

This HPE Smart Memory kit delivers 64GB of DDR5 4800 (PC5 38400) capacity in a single 288-pin RDIMM. It targets enterprise servers that require registered ECC memory for data integrity and high-density configurations.

288-pin RDIMM installs in standard DDR5 slots

The module seats like any DDR5 RDIMM: align the notch, press until the ejectors click, and the system detects it at 4800 MT/s with CL40 40-39-39 timings. Issues usually arise when mixing ranks or speeds across channels, or when the platform BIOS lacks support for 2Rx4 registered DIMMs.

Verify DDR5 RDIMM support and 1.10V operation

Before ordering, confirm the server motherboard accepts DDR5 registered ECC DIMMs at 1.10V and can run 2Rx4 modules at the rated speed. Check the qualified vendor list and BIOS revision for P50312-B21 compatibility; some platforms limit rank-per-channel counts or maximum memory speed.

How it compares

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

Price $3,652.99
Pricier than about 90% 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 $57.08 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
Model nameP50312-B21
Total capacity64 GB
Product type288-Pin DDR5 RDIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Memory
CAS latencyCL40
Memory timings40-39-39
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Power
Rated voltage1.1 V
Size & build
Shipping weight0.91 kg
Package size178 × 127 × 76 mm

Questions about this item

How can I confirm the HPE P50312-B21 is running at DDR5 4800 after installation?

Check the memory speed in the server BIOS or use a tool like dmidecode; it should report 4800 MT/s and PC5 38400 bandwidth.

What is included with the HPE P50312-B21 and what else is needed?

The kit contains one 64GB 288-Pin DDR5 RDIMM; additional modules must be purchased separately to fill other slots.

Which capacity and rank option should I choose for this model?

This part is a single 64GB 2Rx4 module; select it when you need that density and rank configuration.

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