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Green 288-pin DDR5 ECC registered DIMM module without heat spreader

OWC

OWC 16GB DDR5 4800 CL40 1Rx8 288-pin 1.1V ECC RDIMM memory upgrade

SKU CH-ACC7-6RRBV

16 GB DDR5 ECC registered DIMM at 4800 MT/s for Dell PowerEdge R660XS and R760XS servers

  • Capacity16GB
  • Type288-Pin DDR5 ECC RDIMM
  • SpeedDDR5 4800 (PC5 38400)
  • CAS LatencyCL40
  • Voltage1.1V
  • ECCYes

Capacity 16GB

  • ECC registered design protects data integrity in servers
  • 4800 MHz DDR5 speed handles demanding workloads
  • 16 GB capacity expands memory for virtualisation
  • 1 V operation reduces power draw
  • Compatible with Dell PowerEdge R660XS and R760XS

Server Memory Upgrade

This 16GB DDR5 ECC registered DIMM is built for Dell PowerEdge R660XS and R760XS servers. It delivers 4800MHz speed with CL40 latency at 1.1V. The module uses a 1Rx8 organisation and a 288-pin form factor. It is designed for workstation, NAS, server and network switch environments that require error-correcting registered memory.

Replaces Dell Part Numbers

The module replaces Dell part numbers AC239377 and SNP1V1N1C/16G. The upgrade is worth it when your current configuration uses lower-capacity registered DIMMs or when empty slots are available for expansion. It cannot be mixed with unbuffered or load-reduced ECC memory, so a full replacement set is required if the existing population uses a different ECC type.

Build Integration

The DIMM fits directly into the 288-pin DDR5 slots of the compatible PowerEdge chassis. No heat spreader is included, so airflow across the module relies on the server's standard cooling design. Each module adds 16GB of registered ECC capacity, freeing the memory controller from parity duties and supporting data integrity in multi-socket configurations.

Highlights

  • ECC registered design protects data integrity in servers
  • 4800 MHz DDR5 speed handles demanding workloads
  • 16 GB capacity expands memory for virtualisation
  • 1 V operation reduces power draw
  • Compatible with Dell PowerEdge R660XS and R760XS

Specifications

BrandOWC
Part Number4R8D51R816GB
Capacity16GB
Type288-Pin DDR5 ECC RDIMM
SpeedDDR5 4800 (PC5 38400)
CAS LatencyCL40
Voltage1.1V
ECCYes
Buffered/RegisteredRegistered
Rank1Rx8
Heat SpreaderNo
Compatible SystemDell PowerEdge R660XS
Dell PowerEdge R760XS

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Questions about this item

Will this 288-pin DDR5 RDIMM fit the memory slots in a Dell PowerEdge R660XS or R760XS?

Yes, the module uses the standard 288-pin DDR5 RDIMM form factor required by the PowerEdge R660XS and R760XS, and it replaces Dell part numbers AC239377 and SNP1V1N1C/16G.

What is the correct way to install this registered ECC module, and what common mistake should I avoid?

Power down the server, open the chassis, align the notch on the 288-pin edge connector with the slot key, and press firmly until the retention clips lock; do not mix this registered DIMM with unbuffered or load-reduced memory, as the system will not boot.

When will this 16 GB DDR5 4800 module need replacement, and what should I watch for?

The module has no moving parts and includes a limited lifetime warranty; replace it only if memory diagnostics report correctable or uncorrectable ECC errors, or if a firmware update requires a different rank or voltage configuration.

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