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Green bare circuit board DDR5 ECC RDIMM 288-pin module

OWC

OWC 128GB DDR5 5600 ECC RDIMM 4Rx4 1.1V CL46 memory upgrade

SKU CH-JFYF-KEZ0J

A 128 GB DDR5 5600 ECC registered DIMM for compatible Supermicro SuperServer systems

  • Total capacity128 GB
  • Rated speedDDR5 5600 (PC5 44800)
  • CAS latency46
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • Memory rank4Rx4

Capacity 128GB

  • ECC registered design protects data integrity in server workloads
  • Single 128GB module delivers high capacity per DIMM slot
  • DDR5 5600 speed with CL46 latency supports demanding applications
  • 1V operation reduces power draw in dense configurations
  • Validated for Supermicro SuperServer SYS-821GE-TNHR and related models

128GB DDR5 5600 ECC RDIMM for Supermicro

This OWC module provides 128GB of DDR5 5600 memory in a 288-pin ECC Registered DIMM form factor. It operates at 1.1V with CL46 latency and a 4Rx4 rank configuration. The part number is 5R6D54R4128G and it is validated for specific Supermicro SuperServer models including SYS-821GE-TNHR and SYS-821GV-TNR.

Suited for server and workstation upgrades only

This memory is designed for compatible Supermicro SuperServer platforms such as the SYS-E403-13E-FRN2T, SYS-F511E2-RT and SYS-F521E3-RTB. It will not function in standard desktop computers or consumer motherboards. It cannot be mixed with unbuffered or load-reduced ECC modules. Buyers needing non-ECC or unregistered memory should look elsewhere.

4Rx4 registered ECC architecture decides fit

The single 128GB module uses a 4Rx4 organisation with registered ECC buffering. This rank structure and buffering type must match the server memory controller requirements exactly. Verify the platform supports 4Rx4 registered DIMMs before purchase. The module is JEDEC-standard and RoHS compliant.

How it compares

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

Price $3,896.99
Pricier than about 76% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB
Higher than about 70% of the 20,941 comparable items (median 32 GB).
CAS latency 46
Higher than about 90% of the 483 comparable items (median 22).
Price per GB $30.45 per GB
Pricier than about 87% of the 20,941 comparable items (median $8.19 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameOWC
Part number5R6D54R4128G
Total capacity128 GB
Product type288-Pin DDR5 ECC RDIMM
Performance
Rated speedDDR5 5600 (PC5 44800)
Memory
CAS latency46
ECC supportYes
Buffer typeRegistered
Memory rank4Rx4
Heat spreaderNo
Power
Rated voltage1.1 V
Compatibility
Compatible systemsSupermicro SuperServer SYS-821GE-TNHR
Supermicro SuperServer SYS-821GV-TNR
Supermicro SuperServer SYS-E403-13E-FRN2T
Supermicro SuperServer SYS-F511E2-RT
Supermicro SuperServer SYS-F521E3-RTB

Other versions of this model

5 more in the same range

Questions about this item

Will this 288-pin DDR5 RDIMM fit the memory slots in my Supermicro SuperServer SYS-821GE-TNHR?

Yes. The module uses the standard 288-pin DDR5 RDIMM form factor required by the listed Supermicro SuperServer models.

What is the correct way to seat this 128 GB ECC registered module, and what step is often missed?

Align the notch with the slot key, press down firmly until both side latches click shut, and verify the system detects the full 128 GB capacity at 5600 MT/s.

When should I expect to replace this 1.1 V DDR5 5600 CL46 memory?

DDR5 RDIMMs have no scheduled replacement interval; replace only if diagnostics report uncorrectable ECC errors or the module fails to train at 5600 MT/s.

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