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Green rectangular DDR4 288-pin ECC RDIMM module with black chips, no heat spreader

OWC

OWC 64GB DDR4 2933 ECC RDIMM 2Rx4 CL21 1.2V 288-pin memory upgrade

SKU CH-HG6F-9WV52

A 64GB DDR4 2933 ECC registered DIMM for Fujitsu PRIMERGY RX2520 M5, TX2550 M5, CX2570 M4, RX2530 M4 and RX2540 M4 servers

  • Total capacity64 GB
  • Rated speedDDR4 2933 (PC4 23400)
  • CAS latencyCL21
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank2Rx4
  • 64 GB capacity lets you run larger workloads
  • ECC registered design detects and corrects data errors
  • DDR4 2933 speed matches Fujitsu PRIMERGY server specs
  • 2 V operation reduces power draw in dense configs
  • Single 2Rx4 module simplifies upgrades on RX2520 M5 TX2550 M5

Server memory upgrade

This 64GB DDR4 2933 ECC registered DIMM is built for Fujitsu PRIMERGY servers and workstations. It delivers error-correcting, registered performance for 24/7 workloads in the RX2520 M5, TX2550 M5, CX2570 M4, RX2530 M4 and RX2540 M4 platforms. The single-module design adds capacity without occupying extra slots.

Build integration

The module uses the standard 288-pin DDR4 form factor and runs at 1.2V, matching the voltage and pin layout of the listed PRIMERGY systems. Registered signalling and 2Rx4 organisation require a motherboard that supports ECC registered memory; it cannot be mixed with unbuffered or load-reduced modules. Backward compatibility with 2133, 2400 and 2666MHz buses allows installation in older configurations without manual speed adjustment.

Thermals and power

Operating at 1.2V keeps power draw low for high-density server deployments. The module has no heat spreader, relying on chassis airflow for cooling in typical rack or tower environments. Registered buffering reduces electrical load on the memory controller, contributing to stable operation under sustained multi-threaded workloads.

How it compares

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

Price $403.99
Typical for this category: the median of 21,161 items is $397.99.
Total capacity 64 GB
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $6.31 per GB
Cheaper than about 62% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number2R9D42R464 GB
Total capacity64 GB
Product type288-Pin DDR4 ECC RDIMM
Performance
Rated speedDDR4 2933 (PC4 23400)
Memory
CAS latencyCL21
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsFujitsu PRIMERGY RX2520 M5
Fujitsu PRIMERGY TX2550 M5
Fujitsu PRIMERGY CX2570 M4
Fujitsu PRIMERGY RX2530 M4
Fujitsu PRIMERGY RX2540 M4

Questions about this item

Will the 2933 MHz speed be maintained under sustained server workloads?

The module runs at 2933 MHz with CL21 latency at 1.2 V; JEDEC compliance means it will hold that speed as long as the platform's memory controller supports it.

How much heat does a registered 64 GB DIMM produce during all-day operation?

The 1.2 V DDR4 design and lack of a heat spreader keep thermal output low; registered buffering adds minimal extra power draw compared with unbuffered modules.

Which Fujitsu PRIMERGY systems must I already own for this module to work?

It is validated for PRIMERGY RX2520 M5, TX2550 M5, CX2570 M4, RX2530 M4 and RX2540 M4 servers.

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