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Two green 288-pin DDR5 RDIMM modules without heat spreaders

OWC

OWC 256GB (2x128GB) DDR5 4800 CL40 4Rx4 ECC Registered RDIMM memory upgrade

SKU CH-X9RH-XTPTF

Dual 128 GB DDR5-4800 CL40 ECC registered RDIMMs totalling 256 GB for Cisco UCS C220 M7 SFF, C240 M7 SFF, X210c M7 and X410c M7 servers

  • Total capacity256 GB (2 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • Memory rank4Rx4

Capacity 256GB (2 x 128GB)

  • 256GB kit expands server capacity with two 128GB modules
  • DDR5 4800 CL40 delivers 38400 MT/s bandwidth for demanding workloads
  • ECC registered design detects and corrects data errors in real time
  • 1V operation reduces power draw per module
  • Qualified for Cisco UCS C220 M7 SFF C240 M7 SFF X210c M7 X410c M7

Target Platform

This 256GB kit contains two 128GB DDR5 4800 CL40 4Rx4 ECC registered RDIMM modules built for Cisco UCS C220 M7 SFF, C240 M7 SFF, X210c M7 and X410c M7 servers. It replaces Cisco part UCSMR128G4RE1 and is not compatible with standard desktop computers or unbuffered and load-reduced memory types.

Build Integration

Each module uses a 288-pin DDR5 form factor and operates at 1.1V, requiring a server platform that supports registered ECC memory. The dual-module layout fills two slots and leaves remaining DIMM sockets available for further capacity expansion within the validated Cisco systems.

Thermals and Power

Modules run at the standard 1.1V DDR5 voltage without integrated heat spreaders, relying on chassis airflow for cooling. Registered buffering adds minimal electrical load while the CL40 latency and 4800 MT/s data rate keep power draw consistent with JEDEC DDR5 specifications for sustained server workloads.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $6,722.99
Pricier than about 82% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (2 × 128 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $26.26 per GB
Pricier than about 72% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number4R8D54R4256P
Total capacity256 GB (2 × 128 GB)
Product type288-Pin DDR5 ECC RDIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Memory
CAS latencyCL40
ECC supportYes
Buffer typeRegistered
Memory rank4Rx4
Heat spreaderNo
Power
Rated voltage1.1 V
Compatibility
Compatible systemsCisco UCS C220 M7 SFF
Cisco UCS C240 M7 SFF
Cisco UCS X210c M7
Cisco UCS X410c M7

Other versions of this model

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Questions about this item

What CAS latency will the 4800 MHz DDR5 modules run at under sustained server workloads?

The modules operate at CL40 latency as specified by the JEDEC DDR5 4800 standard.

How much power does each 128 GB registered DIMM draw at 1.1 V during continuous operation?

Each DIMM runs at the standard DDR5 1.1 V; registered buffering and ECC add minimal overhead compared with unbuffered modules.

Which Cisco UCS servers must already be installed for this 256 GB kit to be compatible?

The kit is validated for Cisco UCS C220 M7 SFF, C240 M7 SFF, X210c M7 and X410c M7 systems.

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