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Green rectangular circuit board with gold edge connector and black memory chips, no heat spreader

OWC

OWC 128GB DDR4 2666 ECC Registered DIMM 8Rx4 288-pin 1.2V CL19 memory upgrade

SKU CH-S0ES-CTMCA

A 128GB DDR4 2666 ECC registered DIMM for Fujitsu PRIMERGY RX4770 M4, RX2530 M4, RX2540 M4, CX2560 M4 and CX2570 M4 servers

  • Total capacity128 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank8Rx4

Capacity 128GB

  • 128 GB capacity expands server memory headroom
  • ECC registered design protects data integrity in critical workloads
  • DDR4 2666 MHz speed matches Fujitsu PRIMERGY specifications
  • 2 V operation reduces power draw per module
  • Compatible with PRIMERGY RX4770 M4 and RX2530 M4 systems

Server Memory Upgrade

This single 128GB DDR4 2666 module is an ECC registered DIMM built for Fujitsu PRIMERGY servers. It runs at 1.2V with CL19 latency and an 8Rx4 organisation across 288 pins. The part replaces Fujitsu numbers S26361-F4026-E328 and related codes.

Workstation and Server Builders

The module suits administrators expanding memory in RX4770 M4, RX2530 M4, RX2540 M4, CX2560 M4 or CX2570 M4 systems. It will not work in standard desktop PCs, nor can it be mixed with unbuffered or load-reduced ECC memory.

Registered ECC Architecture

Registered ECC operation is the decisive specification; the module only functions in platforms that support registered error-correcting memory. Systems requiring unbuffered or non-ECC DIMMs cannot use this part.

How it compares

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

Price $737.99
Pricier than about 57% 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).
Price per GB $5.77 per GB
Cheaper than about 67% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number2R6D48R4128G
Total capacity128 GB
Product type288-Pin DDR4 ECC RDIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
CAS latencyCL19
ECC supportYes
Buffer typeRegistered
Memory rank8Rx4
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsFujitsu PRIMERGY RX4770 M4
Fujitsu PRIMERGY CX2560 M4
Fujitsu PRIMERGY CX2570 M4
Fujitsu PRIMERGY RX2530 M4
Fujitsu PRIMERGY RX2540 M4

Other versions of this model

5 more in the same range

Questions about this item

Will the 8Rx4 registered DIMM need any firmware updates or periodic reseating after installation?

No firmware updates or scheduled reseating are required; the module is a standard JEDEC DDR4 2666 CL19 1.2V registered ECC DIMM that operates within the server's normal memory management.

What thermal or power limit appears first when the 128GB module runs at full load continuously?

The module draws 1.2V with no heat spreader, so the platform's DIMM-slot airflow and power budget set the practical ceiling before the memory itself throttles.

How much extra heat and fan noise does a single 128GB 2666 CL19 1.2V registered DIMM add during 24/7 operation?

At 1.2V without a heat spreader the incremental thermal load is small; the server's existing cooling curve typically absorbs it without raising fan speeds.

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