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Eight green DDR5 RDIMM modules in anti-static tray

OWC

OWC 128GB (8x16GB) DDR5 4800 CL40 ECC Registered RDIMM Server RAM

SKU CH-YWGV-T8N4S

Eight-module 128GB DDR5 4800 CL40 ECC registered RDIMM kit for servers

  • Total capacity128 GB (8 × 16 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • Memory rank1Rx8

Capacity 128GB (8 x 16GB)

Show 4 more

Rank 1Rx8

  • 128 GB total capacity from eight 16 GB modules
  • DDR5 4800 speed with CL40 latency for server workloads
  • ECC registered design detects and corrects data errors
  • 1 V operation reduces power draw in dense configurations
  • JEDEC and RoHS compliant for warranty-safe upgrades

ECC Registered DDR5 Server Kit

This kit supplies 128GB of DDR5 ECC Registered memory across eight 16GB modules for workstations and servers that require registered DIMMs. It is not compatible with standard desktop computers or systems that use unbuffered or load-reduced memory.

DDR5 4800 Interface Constraints

The modules operate at DDR5 4800 (PC5-38400) with CL40 latency at 1.1V, conforming to JEDEC specifications. Registered buffering adds a clock cycle, so the platform must support registered DIMMs and the DDR5 4800 speed grade.

1Rx8 Rank Configuration Decides Fit

Each module uses a 1Rx8 organisation, which determines how the memory controller addresses the kit. The server or workstation must accept 1Rx8 registered DIMMs in an eight-module population for this upgrade to function.

How it compares

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

Price $3,027.99
Pricier than about 90% of the 6,523 comparable items (median $188.99).
Total capacity 128 GB (8 × 16 GB)
Higher than about 90% of the 6,064 comparable items (median 32 GB).
Price per GB $23.66 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 number4R8D51R8128K
Total capacity128 GB (8 × 16 GB)
Product type288-Pin DDR5 ECC RDIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Memory
CAS latencyCL40
ECC supportYes
Buffer typeRegistered
Memory rank1Rx8
Kit configurationDual Channel Kit
Heat spreaderNo
Power
Rated voltage1.1 V

Other versions of this model

5 more in the same range

Questions about this item

How do I decide between the 128GB kit and a smaller capacity for my server?

This kit provides 128GB total across eight 16GB modules, so choose it when your workload and motherboard slot count can use the full amount.

What does the DDR5 4800 rating deliver in an actual system?

The modules run at 4800 MT/s with CL40 latency at 1.1V, giving the bandwidth and timing the platform negotiates at that JEDEC speed.

What does the 288-pin ECC Registered RDIMM interface limit in practice?

The 288-pin registered DIMM form factor only fits server and workstation boards that support ECC RDIMM memory; it will not work in standard desktop systems.

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