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Green rectangular DDR5 server memory module with gold edge connector and black chips, no heat spreader

OWC

OWC 4R8D51R432GB 32GB DDR5 4800 CL40 1Rx4 ECC Registered RDIMM

SKU CH-5N18-SF97F

32GB DDR5 4800 ECC registered RDIMM for servers and workstations, CL40 1.1V 288-pin 1Rx4 module

  • Total capacity32 GB
  • Rated speedDDR5 4800 (PC5 38400)
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • Memory rank1Rx4
  • 32 GB capacity supports heavy server workloads
  • DDR5 4800 speed delivers high data throughput
  • CL40 latency balances timing and stability
  • ECC registered design protects data integrity
  • 1 V operation reduces power consumption

Server ECC RDIMM Upgrade

This OWC 32GB DDR5 4800 CL40 module is a registered ECC RDIMM built for workstations and servers. It runs at 1.1V with a 1Rx4 rank configuration on a 288-pin interface. The part replaces Hynix HMCG84MEBRA113N, HMCG84MEBRA115N and HMCG84MEBRA174N modules.

JEDEC Compliant Design

The module meets JEDEC and ROHS standards for a warranty-safe upgrade. It is tested to match or exceed OEM specifications and cannot be mixed with unbuffered or load-reduced ECC memory. No heat spreader is fitted.

For Registered ECC Platforms Only

Suits administrators extending the life of existing DDR5 registered ECC infrastructure or building new compatible systems. Not for standard desktop computers, laptops or any platform that requires unbuffered non-ECC or load-reduced DIMMs.

How it compares

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

Price $752.99
Pricier than about 76% of the 6,523 comparable items (median $188.99).
Total capacity 32 GB
Typical for this category: the median of 6,064 items is 32 GB.
Price per GB $23.53 per GB
Pricier than about 85% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameOWC
Part number4R8D51R432 GB
Total capacity32 GB
Product type288-Pin DDR5 ECC RDIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Memory
CAS latencyCL40
ECC supportYes
Buffer typeRegistered
Memory rank1Rx4
Heat spreaderNo
Power
Rated voltage1.1 V

Questions about this item

Does the 288-pin DDR5 RDIMM require any periodic maintenance or component replacement after installation?

No, the module has no moving parts or heat spreader and is designed for continuous server operation without scheduled maintenance.

What is the first limit reached when the CL40 1Rx4 module runs at DDR5 4800 under sustained load?

The JEDEC-standard 1.1 V operating voltage and CL40 latency define the electrical and timing ceiling before any throttling would occur.

How much noise and heat does the 32 GB registered DIMM produce when the server runs all day?

The module is silent and has no heat spreader; it operates at the standard 1.1 V so thermal output stays within normal DDR5 RDIMM limits.

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