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Four green circuit boards with black memory chips and gold edge connectors

OWC

OWC 128GB (4x32GB) DDR5 4800 PC5-38400 CL40 2Rx8 ECC Registered RDIMM ThinkStation P5 memory upgrade

SKU CH-H1F3-YXP54

Four 32 GB DDR5 4800 ECC registered RDIMMs totalling 128 GB for ThinkStation P5 workstations

  • Total capacity128 GB (4 × 32 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • Memory rank2Rx8

Capacity 128GB (4 x 32GB)

  • 128 GB total capacity from four 32 GB modules
  • DDR5 4800 speed rated at PC5-38400 CL40
  • ECC registered design detects and corrects data errors
  • 1 V operation matches JEDEC standard for DDR5
  • Validated for Lenovo ThinkStation P5 workstation compatibility

Lenovo ThinkStation P5 128GB DDR5 kit

This 128GB upgrade kit supplies four 32GB DDR5 4800 registered ECC DIMMs built for the Lenovo ThinkStation P5 workstation. It targets professionals who need maximum registered memory capacity for virtualisation, rendering or large dataset workloads. The modules operate at 1.1V and conform to JEDEC PC5-38400 CL40 specifications. Buyers with standard desktop platforms cannot use this registered ECC memory.

Four 32GB registered DIMMs at 4800 MT/s

The quad-channel kit delivers 128GB total capacity with CL40 latency and 2Rx8 organisation across 288-pin slots. Registered buffering and on-die ECC protect data integrity in sustained server-class workloads. Capacity heads up at 128GB; larger configurations require higher-density modules not included here. Workloads exceeding this limit will need a platform supporting greater DIMM counts or higher densities.

JEDEC compliant modules with lifetime warranty

Each DIMM is validated to meet OEM specifications and carries a limited lifetime warranty with free technical support. No heat spreaders are fitted, so airflow in the ThinkStation P5 chassis manages thermals directly. The kit cannot be mixed with unbuffered or load-reduced ECC memory. Buyers needing RGB lighting or overclocking profiles should look elsewhere.

How it compares

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

Price $3,478.99
Pricier than about 75% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (4 × 32 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $27.18 per GB
Pricier than about 76% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number4R8D52R8128S
Total capacity128 GB (4 × 32 GB)
Product type288-Pin DDR5 ECC RDIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Memory
CAS latencyCL40
ECC supportYes
Buffer typeRegistered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.1 V
Compatibility
Compatible systemsLenovo ThinkStation P5

Other versions of this model

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Questions about this item

Will these DDR5 4800 CL40 2Rx8 registered ECC modules work with the existing DDR5 memory already installed in my ThinkStation P5?

The kit is validated for the ThinkStation P5 and uses JEDEC-standard DDR5 4800 CL40 2Rx8 registered ECC. Mixing registered ECC with unbuffered or load-reduced ECC is not supported, so confirm your current modules are also registered ECC before adding these.

How can I verify the kit is running at DDR5 4800 CL40 with ECC active after installation?

Enter the BIOS or use a system-information utility; it should report 4800 MT/s, CL40 timings, 1.1 V, registered ECC and 128 GB total across the four 32 GB modules.

What comes in the box and is anything else required to install the 4x32 GB kit in the ThinkStation P5?

The box contains four 32 GB 288-pin DDR5 4800 CL40 2Rx8 registered ECC RDIMMs. No extra parts are needed; the modules plug directly into the workstation's memory slots.

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