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Green printed circuit board with black memory chips and gold edge connectors

OWC

OWC 128GB DDR4 2666 CL19 8Rx4 288-pin ECC RDIMM 2R6D48R4128G

SKU CH-E950-ZZAAS

Single 128GB DDR4 2666 CL19 ECC registered DIMM for Fujitsu PRIMERGY CX2550 M4, CX2560 M4, CX2570 M4, RX2530 M4 and RX2540 M4 servers

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

Capacity 128GB

  • 128 GB single-module capacity fits dense server configurations
  • ECC registered design protects data integrity in workloads
  • DDR4 2666 CL19 at 1.2 V balances speed and power
  • Compatible with Fujitsu PRIMERGY CX2550 M4 CX2560 M4 CX2570 M4 RX2530 M4 RX2540 M4
  • Replaces Fujitsu part numbers S26361-F4026-E328 S26361F4026E328 S26361F4026E728 S26361-F4026-L328 S26361F4026L728

Targeted Server Upgrade

This single 128GB DDR4 2666 CL19 8Rx4 288-pin ECC Registered DIMM is built for Fujitsu PRIMERGY CX2550 M4, CX2560 M4, CX2570 M4, RX2530 M4 and RX2540 M4 servers. It will not work in standard desktops or with unbuffered and load-reduced memory types.

Capacity and Headroom

The module delivers 128GB at 1.2V with JEDEC-standard timings, and it will downclock to 2133MHz or 2400MHz if the platform requires it. Buyers needing more capacity per slot or a different rank configuration cannot use this part.

Thermals and Power

With no heat spreader and a low 1.2V operating voltage, the DIMM relies on the server’s directed airflow for cooling. Power draw stays within registered DDR4 limits, and acoustic impact is negligible inside a rack chassis.

How it compares

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

Price $755.99
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 $5.91 per GB
Cheaper than about 66% 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 CX2550 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 this 2666MHz ECC RDIMM run with existing 2133MHz or 2400MHz modules in a PRIMERGY RX2530 M4?

Yes, the module is backward compatible with 2133MHz and 2400MHz speeds and will operate at the lowest common frequency when mixed with slower DDR4 ECC Registered DIMMs.

How can I verify the 128GB 8Rx4 module is detected correctly after installation in a CX2560 M4?

Check the system BIOS or iRMC interface; it should show a single 128GB DDR4 2666 CL19 1.2V ECC Registered DIMM at the populated slot.

Does the package include only the 288-pin RDIMM or are heat spreaders and cables supplied?

The box contains one 128GB 288-pin DDR4 2666 CL19 8Rx4 1.2V ECC Registered DIMM; no heat spreader or additional cables are included.

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