We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Green rectangular DDR4 288-pin ECC registered DIMM with black chips, no heat spreader

OWC

OWC 64GB DDR4 2666 ECC Registered DIMM 2R6D44R464GB

SKU CH-JTDV-WJ9P7

64 GB DDR4-2666 ECC registered DIMM for Fujitsu PRIMERGY CX2550 M4, CX2560 M4, CX2570 M4, RX2530 M4 and RX2540 M4 servers

  • Capacity64GB
  • Type288-Pin DDR4 ECC RDIMM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.2V
  • ECCYes

Capacity 64GB

  • 64GB
  • 128GB

Struck-through versions exist but are not stocked here.

  • 64GB capacity expands server memory for demanding workloads
  • ECC registered design detects and corrects data errors automatically
  • DDR4 2666 speed with CL19 latency delivers responsive performance
  • 2V operation reduces power draw in compatible Fujitsu PRIMERGY systems
  • Backward compatible with 2133MHz and 2400MHz platforms for flexible deployment

Server ECC Upgrade

This 64GB DDR4 2666 ECC Registered DIMM is built for Fujitsu PRIMERGY servers including the CX2550 M4, CX2560 M4, CX2570 M4, RX2530 M4 and RX2540 M4. It runs at PC4-21300 speed with CL19 latency and 1.2V operation. The 4Rx4 organisation and 288-pin form factor match the OEM part numbers S26361F4026L764, S26361-F4026-L364, S26361F4026E764, S26361-F4026-E364 and S26361F4026E364. It will not work in standard desktop computers.

Thermals and Power

Operating at 1.2V, the module draws minimal power and generates little heat in normal server workloads. No heat spreader is fitted, relying on chassis airflow for cooling. Registered buffering reduces electrical load on the memory controller, helping keep system power draw stable. The JEDEC-compliant design runs silently with no moving parts.

What the Bundle Changes

The single 64GB stick replaces multiple smaller modules, freeing DIMM slots for future expansion. Backward compatibility with 2133MHz and 2400MHz systems allows installation in older PRIMERGY platforms without configuration changes. ECC Registered operation adds error detection and correction for data integrity in critical workloads. The module cannot be mixed with unbuffered or load-reduced memory types.

Highlights

  • 64GB capacity expands server memory for demanding workloads
  • ECC registered design detects and corrects data errors automatically
  • DDR4 2666 speed with CL19 latency delivers responsive performance
  • 2V operation reduces power draw in compatible Fujitsu PRIMERGY systems
  • Backward compatible with 2133MHz and 2400MHz platforms for flexible deployment

Specifications

BrandOWC
Part Number2R6D44R464GB
Capacity64GB
Type288-Pin DDR4 ECC RDIMM
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.2V
ECCYes
Buffered/RegisteredRegistered
Rank4Rx4
Heat SpreaderNo
Compatible SystemFujitsu 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

Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

How do I install this 288-pin DDR4 ECC Registered DIMM in my Fujitsu PRIMERGY RX2530 M4 and what step is often missed?

Power off the server, open the chassis, align the notch on the 288-pin module with the slot key, press firmly until both retention clips click, then confirm the firmware recognises the full 64GB at 2666MHz.

What maintenance or replacement will this 64GB 4Rx4 module need over time?

No routine maintenance is required; the module has no heat spreader and runs at 1.2V, so replacement only occurs if a memory error appears or capacity must be increased beyond the server's maximum supported DIMM count.

What limit appears first when this CL19 2666MHz registered memory runs sustained workloads?

The memory controller's maximum supported rank-per-channel and total capacity ceiling will be reached before the module's own 2666MHz CL19 rating becomes a bottleneck.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.