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

OWC

OWC 128GB DDR4 2933 PC4-23400 CL21 8Rx4 288-pin ECC RDIMM memory upgrade

SKU CH-RKT5-EPDN4

A single 128GB DDR4 2933 ECC registered RDIMM for Fujitsu PRIMERGY servers and workstations

  • Total capacity128 GB
  • Rated speedDDR4 2933 (PC4 23400)
  • CAS latency21
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank8Rx4
  • 128GB capacity supports demanding server workloads
  • ECC registered design protects data integrity in critical systems
  • DDR4 2933 speed with CL21 latency delivers responsive performance
  • 2V operation reduces power consumption in dense configurations
  • Validated for Fujitsu PRIMERGY CX2550 M5 CX2560 M5 RX2530 M5 RX2540 M5 RX4770 M5

128 GB DDR4-2933 ECC RDIMM for Fujitsu servers

This single 128 GB DDR4 2933 PC4-23400 CL21 8Rx4 registered DIMM is built for Fujitsu PRIMERGY CX2550 M5, CX2560 M5, RX2530 M5, RX2540 M5 and RX4770 M5 systems. It targets administrators expanding memory in supported rack and blade servers where ECC registered modules are required.

Verify registered ECC requirement

Confirm the host server accepts 288-pin DDR4 registered ECC RDIMMs and does not mix them with unbuffered or load-reduced modules. Check the system manual for maximum capacity per channel and approved population rules before ordering.

JEDEC compliant 1.2 V module without heat spreader

The module runs at 1.2 V, meets JEDEC and RoHS standards, and is backward compatible with 2133, 2400 and 2666 MHz operation. Its bare PCB design fits dense server DIMM sockets and relies on chassis airflow for cooling.

How it compares

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

Price $732.99
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).
CAS latency 21
Lower than about 63% of the 483 comparable items (median 22).
Price per GB $5.73 per GB
Cheaper than about 68% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number2R9D48R4128G
Total capacity128 GB
Product type288-Pin DDR4 ECC RDIMM
Performance
Rated speedDDR4 2933 (PC4 23400)
Memory
CAS latency21
ECC supportYes
Buffer typeRegistered
Memory rank8Rx4
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsFujitsu PRIMERGY CX2550 M5
Fujitsu PRIMERGY CX2560 M5
Fujitsu PRIMERGY RX2530 M5
Fujitsu PRIMERGY RX2540 M5
Fujitsu PRIMERGY RX4770 M5

Questions about this item

Does the 128GB 288-pin DDR4 2933 module ship alone or as a kit with multiple sticks?

The upgrade consists of a single 128GB DDR4 2933 PC4-23400 CL21 8Rx4 288-pin 1.2V ECC Registered RDIMM module. No additional sticks or accessories are included.

Why choose the 128GB 8Rx4 Registered ECC version instead of a lower-capacity or unbuffered module?

This 128GB 8Rx4 Registered ECC RDIMM is built for Fujitsu PRIMERGY CX2550 M5, CX2560 M5, RX2530 M5, RX2540 M5 and RX4770 M5 servers. It cannot be mixed with unbuffered or load-reduced memory and will not work in standard desktops.

What speed will the PC4-23400 CL21 module actually run at in a Fujitsu PRIMERGY RX2530 M5?

The module is rated for DDR4 2933 (PC4-23400) at CL21 and 1.2V. It is backward compatible with 2133MHz, 2400MHz and 2666MHz bus speeds, so it will operate at the highest speed the server platform supports.

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