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Green rectangular circuit board with gold edge connector and black memory chips

OWC

OWC 64GB DDR4 2933 CL21 2Rx4 288-pin ECC Registered DIMM server RAM

SKU CH-XVFT-671B9

64GB DDR4 2933 CL21 ECC registered DIMM for servers, workstations and NAS systems, backward compatible with 2133, 2400 and 2666MHz speeds

  • Capacity64GB
  • Type288-Pin DDR4 ECC RDIMM
  • SpeedDDR4 2933 (PC4 23400)
  • CAS LatencyCL21
  • Voltage1.2V
  • ECCYes
  • 64GB capacity expands server memory headroom for virtualization workloads
  • DDR4 2933 CL21 registered ECC protects data integrity in critical applications
  • 2Rx4 dual-rank organization increases memory density per DIMM slot
  • 2V JEDEC-standard voltage reduces power draw across the fleet
  • Backward compatible with 2133, 2400 and 2666MHz systems for flexible deployment

64GB DDR4 ECC Registered DIMM

This 64GB DDR4 2933 CL21 module is built for servers, workstations and NAS systems that require registered ECC memory. It operates at 1.2V with a 2Rx4 rank configuration across 288 pins. The part replaces Fujitsu S26361-F4083-L364 and S26361-F4083-E364 modules in compatible platforms.

Sustained load behaviour

ECC registered architecture corrects single-bit errors and buffers address and command signals, reducing electrical load on the memory controller during continuous operation. Backward compatibility with 2133MHz, 2400MHz and 2666MHz buses allows the module to run stably at lower speeds when the platform dictates. JEDEC-standard timings and voltage maintain consistent throughput without overclocking headroom.

Upgrade context

The module upgrades Fujitsu-branded DDR4 RDIMM slots and cannot be mixed with unbuffered or load-reduced ECC DIMMs. It suits administrators extending the service life of existing registered-memory infrastructure or building new capacity within the same platform constraints. Buyers needing desktop-compatible unbuffered memory or load-reduced ECC should select a different product class.

Points forts

  • 64GB capacity expands server memory headroom for virtualization workloads
  • DDR4 2933 CL21 registered ECC protects data integrity in critical applications
  • 2Rx4 dual-rank organization increases memory density per DIMM slot
  • 2V JEDEC-standard voltage reduces power draw across the fleet
  • Backward compatible with 2133, 2400 and 2666MHz systems for flexible deployment

Caractéristiques

BrandOWC
Part Number2R9D42R464GB
Capacity64GB
Type288-Pin DDR4 ECC RDIMM
SpeedDDR4 2933 (PC4 23400)
CAS LatencyCL21
Voltage1.2V
ECCYes
Buffered/RegisteredRegistered
Rank2Rx4
Heat SpreaderNo

Questions sur cet article

How much heat does the 1.2V DDR4 2933 module add when the server runs all day?

The 1.2V DDR4 2933 ECC registered DIMM operates at standard JEDEC voltage with no heat spreader, so thermal output matches baseline DDR4 server memory under continuous load.

What must the system already have to accept this 288-pin ECC registered DIMM?

The motherboard must provide DDR4 RDIMM slots with registered-buffer support and a CPU or chipset that enables ECC; unbuffered or load-reduced DIMM slots will not work.

Will this CL21 2Rx4 module run stably beside existing 2133MHz or 2400MHz DDR4 sticks?

Yes, the module is backward compatible with 2133MHz, 2400MHz and 2666MHz DDR4, and will down-clock to the slowest installed speed while keeping ECC registered operation.

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