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Two green DDR5 RDIMM modules, 288-pin, no heat spreader

OWC

OWC 128GB (2x64GB) DDR5 4800 CL40 2Rx4 1.1V ECC Registered RDIMM memory upgrade

SKU CH-88MP-RR19P

ECC registered DDR5 kit adds 128 GB across two 64 GB modules at 4800 MT/s CL40 for compatible Lenovo ThinkSystem servers

  • Total capacity128 GB (2 × 64 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 128GB (2 x 64GB)

  • 128 GB total capacity from two 64 GB modules
  • DDR5 4800 speed with CL40 latency for server workloads
  • ECC registered design detects and corrects data errors
  • 1 V operation lowers power draw in dense configurations
  • Validated for ThinkSystem SD650 V3 SD650-I V3 SD665 V3 SD665-N V3 SR630 V3

DDR5 4800 ECC Registered Kit

This OWC kit provides 128 GB of DDR5 4800 memory in two 64 GB registered DIMMs. Each module runs at 1.1 V with CL40 latency and 2Rx4 organisation. The 288-pin RDIMMs include on-die ECC for data integrity in server and workstation environments.

For Lenovo ThinkSystem Servers

The upgrade is validated for ThinkSystem SD650 V3, SD650-I V3, SD665 V3, SD665-N V3 and SR630 V3 platforms. It will not work in standard desktop PCs or consumer motherboards. Builders who need unbuffered or load-reduced DIMMs must choose a different memory type.

JEDEC Compliant, No Heat Spreader

The modules meet JEDEC and RoHS standards for warranty-safe installation. A limited lifetime warranty and free technical support are included. The absence of a heat spreader keeps the profile low for dense server chassis, but buyers needing active cooling should verify airflow in their specific system.

How it compares

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

Price $2,811.99
Pricier than about 72% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (2 × 64 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $21.97 per GB
Pricier than about 67% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number4R8D52R4128P
Total capacity128 GB (2 × 64 GB)
Product type288-Pin DDR5 ECC RDIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Memory
CAS latencyCL40
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.1 V
Compatibility
Compatible systemsLenovo ThinkSystem SD650 V3
Lenovo ThinkSystem SD650-I V3
Lenovo ThinkSystem SD665 V3
Lenovo ThinkSystem SD665-N V3
Lenovo ThinkSystem SR630 V3

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