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Green 288-pin DDR5 RDIMM module with black chips, no heat spreader

OWC

OWC 128GB DDR5 4800 CL40 4Rx4 ECC Registered RDIMM 1.1V memory upgrade

SKU CH-3ARW-KDC07

128 GB DDR5-4800 CL40 ECC registered RDIMM for Dell Precision 5860 and 7960 workstations

  • Capacity128GB
  • Type288-Pin DDR5 ECC RDIMM
  • SpeedDDR5 4800 (PC5 38400)
  • CAS LatencyCL40
  • Voltage1.1V
  • ECCYes

Capacity 128GB

  • 128 GB capacity in a single module
  • ECC registered design protects data integrity
  • DDR5 4800 speed with CL40 latency
  • 1 V operation reduces power draw
  • Validated for Dell Precision 5860 and 7960 series

128 GB DDR5 ECC RDIMM for Dell Precision

This 128 GB DDR5 4800 CL40 4Rx4 registered ECC module is built for Dell Precision 5860 and 7960 workstation towers and the 7960 rack model. It operates at 1.1 V and uses a 288-pin RDIMM form factor.

Registered ECC design prevents mixing

The registered ECC architecture means this module cannot be mixed with unbuffered or load-reduced ECC memory in the same system. It replaces Dell part numbers AC449974 and SNPMMWR9C/128G for direct compatibility.

Suited for Precision workstations needing ECC

Buyers with standard desktop boards or systems that require unbuffered or load-reduced ECC modules should look elsewhere. This upgrade targets the listed Dell Precision models only.

Pontos fortes

  • 128 GB capacity in a single module
  • ECC registered design protects data integrity
  • DDR5 4800 speed with CL40 latency
  • 1 V operation reduces power draw
  • Validated for Dell Precision 5860 and 7960 series

Especificações

BrandOWC
Part Number4R8D54R4128G
Capacity128GB
Type288-Pin DDR5 ECC RDIMM
SpeedDDR5 4800 (PC5 38400)
CAS LatencyCL40
Voltage1.1V
ECCYes
Buffered/RegisteredRegistered
Rank4Rx4
Heat SpreaderNo
Compatible SystemDell Precision Workstation 5860 Tower
Dell Precision Workstation 5860XL Tower
Dell Precision Workstation 7960 Rack
Dell Precision Workstation 7960 Tower
Dell Precision Workstation 7960XL Tower

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Perguntas sobre este artigo

Will the 4Rx4 128GB DDR5 module need any firmware updates or periodic re-seating in a Dell Precision 7960?

The module is JEDEC-compliant DDR5 at 1.1V and requires no firmware updates or scheduled re-seating; ECC registered operation is handled by the workstation memory controller.

What limits sustained throughput first — the CL40 latency or the 4800 MT/s data rate?

The 4800 MT/s data rate sets the peak bandwidth ceiling; CL40 latency affects access time but does not cap sustained throughput.

How much heat does a single 1.1V 128GB registered DIMM produce when the workstation runs all day?

At 1.1V the module runs cool without a heat spreader; typical registered DDR5 power draw stays within standard DIMM thermal limits for continuous operation.

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