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Four green DDR5 RDIMM modules with gold contacts and black chips

OWC

OWC 512GB (4x128GB) DDR5 4800 CL40 4Rx4 ECC Registered RDIMM memory upgrade kit PowerEdge R760xa R860 R960

SKU CH-WH3Z-5JRWP

Four 128 GB DDR5 4800 CL40 ECC registered RDIMMs totalling 512 GB for PowerEdge R760xa, R860 and R960 servers

  • Total capacity512 GB (4 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • Memory rank4Rx4

Capacity 512GB (4 x 128GB)

Show 4 more
  • 512GB total capacity from four 128GB modules
  • DDR5 4800 speed with CL40 latency
  • ECC Registered design detects and corrects data errors
  • 1V operation reduces server power draw
  • Validated for PowerEdge R760xa, R860 and R960

Server-grade DDR5 ECC RDIMM kit

This 512 GB kit contains four 128 GB DDR5 4800 CL40 registered ECC modules built for Dell PowerEdge R760xa, R860 and R960 servers. The 288-pin RDIMM form factor and 1.1 V operation meet JEDEC PC5-38400 specifications for enterprise workloads.

Four matched modules simplify population

Supplying four identical 128 GB sticks lets administrators fill a full channel set in one step, avoiding mixed-rank or mixed-capacity configurations that can limit memory bandwidth or prevent boot. The kit replaces Dell part AC449974 SNPMMWR9C/128G directly.

Registered ECC design demands compatible platforms

These 4Rx4 registered DIMMs will not work in standard desktop motherboards and cannot be mixed with unbuffered or load-reduced ECC memory. The lack of heat spreaders keeps the profile low for dense server chassis, while 1.1 V operation reduces power draw per module.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $14,937.99
Pricier than about 90% of the 21,161 comparable items (median $397.99).
Total capacity 512 GB (4 × 128 GB)
Higher than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $29.18 per GB
Pricier than about 83% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number4R8D54R4512S
Total capacity512 GB (4 × 128 GB)
Product type288-Pin DDR5 ECC RDIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Memory
CAS latencyCL40
ECC supportYes
Buffer typeRegistered
Memory rank4Rx4
Heat spreaderNo
Power
Rated voltage1.1 V
Compatibility
Compatible systemsPowerEdge R760xa
PowerEdge R860
PowerEdge R960

Other versions of this model

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Questions about this item

Will the four 128 GB DDR5 modules need any firmware updates or battery replacements during their service life?

The 288-pin RDIMMs operate at 1.1 V and carry JEDEC-compliant SPD data; no firmware updates or onboard batteries are required, so the kit runs maintenance-free once seated in the R760xa, R860 or R960 memory slots.

What limit appears first when the 512 GB kit runs at DDR5 4800 CL40 continuously in a PowerEdge R960?

Sustained throughput is capped by the 38400 MB/s PC5-38400 interface and CL40 latency; thermal throttling is unlikely because each 128 GB 4Rx4 module runs at the standard 1.1 V without a heat spreader.

How much heat and power do the four registered ECC DIMMs generate when the server runs all day?

At 1.1 V the 4Rx4 RDIMMs draw minimal power and produce low heat; with no heat spreaders they rely on the chassis airflow of the R760xa, R860 or R960, keeping acoustics and thermals at baseline levels.

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