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Two green DDR4 ECC registered DIMMs, 288-pin, no heat spreader

OWC

OWC 64GB (2x32GB) DDR4 2933 PC4-23400 CL21 2Rx4 288-pin 1.2V ECC Registered DIMM memory upgrade

SKU CH-VK31-3SP7P

A 64 GB DDR4 2933 MHz ECC registered dual-rank kit of two 32 GB modules for Cisco HX and C480 M5 servers

  • Capacity64GB (2 x 32GB)
  • Type288-Pin DDR4 ECC RDIMM
  • SpeedDDR4 2933 (PC4 23400)
  • CAS LatencyCL21
  • Voltage1.2V
  • ECCYes

Capacity 64GB (2 x 32GB)

  • ECC registered design protects data integrity in servers
  • 64 GB kit with two 32 GB modules expands capacity
  • DDR4 2933 CL21 speed matches Cisco HX specifications
  • 2 V operation reduces power draw per module
  • Backward compatible with 2133, 2400 and 2666 MHz systems

Server ECC Registered Memory Upgrade

This OWC kit delivers 64 GB of DDR4 ECC registered memory in a matched pair of 32 GB modules. It is built for Cisco HX and C-series M5 servers and workstations that require registered DIMMs with error correction. The modules will not work in standard desktop platforms or alongside unbuffered or load-reduced memory.

Thermals Power and Noise

Operating at 1.2 V and DDR4 2933 CL21, the modules run within standard JEDEC voltage for registered server memory. No heat spreader is fitted, so airflow across the DIMM slots handles thermal management. Registered buffering reduces electrical load on the memory controller, helping keep system power draw predictable under sustained workloads.

Build Integration

Each module uses a 288-pin RDIMM form factor with 2Rx4 organisation, matching the slot layout of the listed Cisco HX220c M5, HX240c M5, HXAF220c M5, HX-E-220M5SX and C480 ML M5 systems. The kit is backward compatible with 2133, 2400 and 2666 MHz bus speeds, allowing deployment in mixed-speed configurations. Buyers needing unbuffered or load-reduced DIMMs should look elsewhere.

Puntos fuertes

  • ECC registered design protects data integrity in servers
  • 64 GB kit with two 32 GB modules expands capacity
  • DDR4 2933 CL21 speed matches Cisco HX specifications
  • 2 V operation reduces power draw per module
  • Backward compatible with 2133, 2400 and 2666 MHz systems

Especificaciones

BrandOWC
Part Number2R9D42R4064P
Capacity64GB (2 x 32GB)
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

How do I install the 288-pin DDR4 ECC Registered DIMMs in a Cisco HX220c M5, and what step is often missed?

Power down the server, open the chassis, align each 32 GB module with the DDR4 slot key, press firmly until both retention clips lock, then verify in BIOS that all 64 GB are detected at 2933 MHz; the step often missed is confirming the memory mode matches the registered ECC configuration.

What maintenance or replacement will the 2Rx4 ECC Registered modules need over time?

No routine maintenance is required for the DDR4 modules themselves; keep server air filters clean and firmware current, and replace a module only if the system logs correctable ECC errors that exceed the platform threshold.

What limit appears first when the 64 GB kit runs sustained workloads at 2933 MHz?

The CAS latency of CL21 at 1.2 V sets the timing ceiling; under continuous load the memory controller will hit latency-bound throughput before thermal or voltage limits become a factor.

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