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Four green 288-pin DDR4 RDIMM modules with black chips no heat spreader

OWC

OWC 256GB (4x64GB) DDR4-2933 ECC RDIMM CL21 1.2V 2Rx4 Cisco UCS M5

SKU CH-0HXG-J1WXY

Four 64 GB DDR4-2933 ECC registered DIMMs totalling 256 GB for Cisco UCS 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)

Voir les 2 autres configurations
  • 256 GB capacity across four 64 GB modules
  • DDR4-2933 speed with CL21 latency at 1.2 V
  • ECC registered RDIMM for data integrity in servers
  • Validated for Cisco UCS B200 M5, B480 M5, C220 M5, C240 M5, C480 M5
  • Backward compatible with 2133, 2400 and 2666 MHz systems

Cisco UCS M5 Server Memory Kit

This 256GB kit contains four 64GB DDR4-2933 ECC Registered RDIMM modules built for Cisco UCS B200 M5, B480 M5, C220 M5, C240 M5 and C480 M5 servers. It is designed for IT teams expanding memory capacity in these specific platforms. It will not work in standard desktop computers or systems that require unbuffered or load-reduced DIMMs.

Registered ECC Operation at 1.2 Volts

Registered buffering and ECC error correction add minimal electrical load while maintaining data integrity under continuous server workloads. The modules run at the standard 1.2V DDR4 voltage and carry no heat spreader, relying on the chassis airflow designed for the supported Cisco UCS models.

Direct Replacement for Cisco Part Numbers

The kit replaces Cisco part numbers HXMRX64G2RTH, HXSPM64G2RTH, UCSMRX64G2RTH and UCSMRX64G2RTHS, simplifying procurement without changing qualified hardware. Backward compatibility with 2133, 2400 and 2666MHz speeds allows mixed-speed populations when the platform requires it.

Points forts

  • 256 GB capacity across four 64 GB modules
  • DDR4-2933 speed with CL21 latency at 1.2 V
  • ECC registered RDIMM for data integrity in servers
  • Validated for Cisco UCS B200 M5, B480 M5, C220 M5, C240 M5, C480 M5
  • Backward compatible with 2133, 2400 and 2666 MHz systems

Caractéristiques

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 UCS B200 M5
Cisco UCS B480 M5
Cisco UCS C220 M5
Cisco UCS C240 M5
Cisco UCS C480 M5

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Questions sur cet article

How do I install the 288-pin DDR4 ECC RDIMM modules in my Cisco UCS C220 M5, and what step is often missed?

Power down the server, open the chassis, align the notch on each 288-pin module with the slot key, press firmly until both latches click, then verify in BIOS that all 256GB are detected at 2933MHz.

What maintenance or replacement will this 2Rx4 registered ECC kit need over its service life?

No routine maintenance is required; the modules have no heat spreaders and run at 1.2V, so replacement only occurs if a DIMM fails ECC correction or the server is decommissioned.

What limit appears first when the 256GB kit runs sustained workloads in a Cisco UCS B480 M5?

The memory controller will down-clock populated channels to 2666MHz or 2400MHz before thermal or voltage limits are reached, as defined by the platform's qualified speed tables.

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