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Four green DDR4 RDIMM modules in a row

OWC

OWC 256GB (4x64GB) DDR4 2933 CL21 ECC RDIMM memory upgrade

SKU CH-2YD6-MDW71

Kit of four 64 GB DDR4 ECC registered DIMMs running at 2933 MHz CL21 for Cisco HX220c M5, HX240c M5, HXAF220c M5, HX-E-220M5SX and C480 ML M5 servers

  • Capacity256GB (4 x 64GB)
  • Type288-Pin DDR4 ECC RDIMM
  • SpeedDDR4 2933 (PC4 23400)
  • CAS LatencyCL21
  • Voltage1.2V
  • ECCYes

Capacity 256GB (4 x 64GB)

  • 256 GB total capacity from four 64 GB modules
  • DDR4 2933 MHz speed with CL21 latency
  • ECC registered design for server data integrity
  • 2 V low-voltage operation reduces power draw
  • Compatible with Cisco HX220c M5, HX240c M5, HXAF220c M5, HX-E-220M5SX and C480 ML M5

System-Specific Server Memory

This OWC kit provides 256 GB of DDR4 ECC registered memory across four 64 GB modules. It is built for Cisco HX220c M5, HX240c M5, HXAF220c M5, HX-E-220M5SX and C480 ML M5 servers. The modules run at 2933 MHz with CL21 latency and 1.2 V operation. They are not compatible with standard desktop computers.

Compatibility Check

Verify that your server model appears in the supported list before ordering. The memory uses a 288-pin registered DIMM form factor with 2Rx4 organisation and cannot be mixed with unbuffered or load-reduced ECC modules. Backward compatibility covers 2133, 2400 and 2666 MHz speeds. Replacement part numbers include HXMRX64G2RTH and UCSMRX64G2RTH.

Thermals and Power

Modules operate at the standard 1.2 V DDR4 voltage without integrated heat spreaders. Registered buffering reduces electrical load on the memory controller during sustained workloads. ECC circuitry adds minimal overhead while correcting single-bit errors. No active cooling is required beyond normal server airflow.

Puntos fuertes

  • 256 GB total capacity from four 64 GB modules
  • DDR4 2933 MHz speed with CL21 latency
  • ECC registered design for server data integrity
  • 2 V low-voltage operation reduces power draw
  • Compatible with Cisco HX220c M5, HX240c M5, HXAF220c M5, HX-E-220M5SX and C480 ML M5

Especificaciones

BrandOWC
Part Number2R9D42R4256S
Capacity256GB (4 x 64GB)
Type288-Pin DDR4 ECC RDIMM
SpeedDDR4 2933 (PC4 23400)
CAS LatencyCL21
Voltage1.2V
ECCYes
Buffered/RegisteredRegistered
Rank2Rx4
Heat SpreaderNo
Compatible SystemCisco HX220c M5
Cisco HX240c M5
Cisco HXAF220c M5
Cisco HX-E-220M5SX
Cisco C480 ML M5

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Preguntas sobre este artículo

What comes in the 256GB kit and is anything else required for installation?

The kit includes four 64GB DDR4 2933 CL21 ECC Registered RDIMM modules. No additional components are needed for installation in compatible Cisco servers.

How do I choose between the listed Cisco models like HX220c M5 and C480 ML M5?

This 4x64GB kit is validated for all listed models: HX220c M5, HX240c M5, HXAF220c M5, HX-E-220M5SX and C480 ML M5. Select based on your specific server model.

What does the 2933MHz speed mean when the modules run in a Cisco HX240c M5?

The modules operate at DDR4 2933 (PC4-23400) with CL21 latency at 1.2V. They also support backward compatibility at 2133MHz, 2400MHz and 2666MHz if the system requires lower speeds.

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