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Two green 288-pin DDR5 RDIMM modules without heat spreaders

OWC

OWC 128GB (2x64GB) DDR5 4800 CL40 ECC Registered RDIMM memory upgrade

SKU CH-95Y5-RQ092

ECC registered DDR5 kit adds 128 GB across two 64 GB modules at 4800 MHz CL40 for Cisco UCS C220 M7 SFF, C240 M7 SFF, X210c M7 and X410c M7 servers

  • Capacity128GB (2 x 64GB)
  • Type288-Pin DDR5 ECC RDIMM
  • SpeedDDR5 4800 (PC5 38400)
  • CAS LatencyCL40
  • Voltage1.1V
  • ECCYes

Capacity 128GB (2 x 64GB)

  • ECC registered design protects data integrity in servers
  • 128 GB kit with two 64 GB modules expands capacity
  • DDR5 4800 CL40 at 1.1 V delivers rated speed
  • 288-pin RDIMM fits Cisco UCS C220 M7 SFF C240 M7 SFF X210c M7 X410c M7
  • Replaces Cisco part UCSMRX64G2RE1 for direct upgrade

Server Memory Upgrade

This 128GB kit contains two 64GB DDR5 4800 CL40 ECC registered RDIMMs built for Cisco UCS C220 M7 SFF, C240 M7 SFF, X210c M7 and X410c M7 servers. The modules operate at 1.1V and use a 2Rx4 organisation with 288-pin form factor. They are not compatible with standard desktop computers or unbuffered memory configurations.

Sustained Load Behaviour

ECC registered design detects and corrects single-bit errors during continuous operation, maintaining data integrity under heavy server workloads. The registered buffer reduces electrical load on the memory controller, allowing stable performance when all slots are populated. CL40 latency and 4800 MT/s throughput support consistent bandwidth for virtualisation and database tasks.

DDR5 Interface Limits

DDR5 4800 PC5-38400 sets the maximum transfer rate and timing envelope for these modules. They cannot be mixed with load-reduced or unbuffered DIMMs, and will not function in platforms that lack registered ECC support. Buyers needing higher capacities per slot or faster speeds must select modules qualified for their specific server platform.

Highlights

  • ECC registered design protects data integrity in servers
  • 128 GB kit with two 64 GB modules expands capacity
  • DDR5 4800 CL40 at 1.1 V delivers rated speed
  • 288-pin RDIMM fits Cisco UCS C220 M7 SFF C240 M7 SFF X210c M7 X410c M7
  • Replaces Cisco part UCSMRX64G2RE1 for direct upgrade

Specifications

BrandOWC
Part Number4R8D52R4128P
Capacity128GB (2 x 64GB)
Type288-Pin DDR5 ECC RDIMM
SpeedDDR5 4800 (PC5 38400)
CAS LatencyCL40
Voltage1.1V
ECCYes
Buffered/RegisteredRegistered
Rank2Rx4
Heat SpreaderNo
Compatible SystemCisco UCS C220 M7 SFF
Cisco UCS C240 M7 SFF
Cisco UCS X210c M7
Cisco UCS X410c M7

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Questions about this item

Will the 1.1 V DDR5 4800 RDIMMs run cool enough for 24-hour server loads without extra airflow?

The modules operate at 1.1 V and carry no heat spreader; they rely on the server's own airflow, which in the listed Cisco UCS chassis is designed for continuous duty.

My Cisco UCS C220 M7 SFF currently runs registered ECC RDIMMs — can I add this kit without changing CPU or BIOS?

The kit is a direct replacement for Cisco part UCSMRX64G2RE1 and matches the 288-pin DDR5 4800 CL40 2Rx4 1.1 V registered ECC spec required by the C220 M7 SFF, C240 M7 SFF, X210c M7 and X410c M7.

Can I mix these 2Rx4 registered ECC modules with load-reduced or unbuffered DIMMs already installed?

No — the manufacturer highlights state this registered ECC memory cannot be mixed with unbuffered or load-reduced DIMMs; all slots must use the same registered ECC type.

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