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Eight green DDR5 RDIMM sticks in a row

OWC

OWC 1TB (8x128GB) DDR5 4800 CL40 ECC Registered RDIMM Memory Upgrade Kit

SKU CH-H0XX-NNB0F

Eight-module kit adds 1 TB of DDR5 ECC registered memory to ThinkStation P7 and PX workstations

  • Total capacity1 TB (8 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • Memory rank4Rx4

Capacity 1TB (8 x 128GB)

  • 1 TB capacity with eight 128 GB modules for massive multitasking
  • DDR5 4800 CL40 speed for high-throughput workstation workloads
  • ECC registered design protects data integrity in critical applications
  • 1 V operation reduces power draw per module
  • JEDEC and RoHS compliant for warranty-safe upgrades

OWC 1TB DDR5 ECC RDIMM Kit

This OWC kit provides 1TB of DDR5 4800 CL40 registered ECC memory across eight 128GB modules. It is built for Lenovo ThinkStation P7 and PX workstations that require registered DIMMs with error correction.

Installing 288-pin RDIMMs in ThinkStation P7 PX

Each module seats in a standard 288-pin DDR5 slot at 1.1V. The system will not accept unbuffered or load-reduced DIMMs alongside these registered parts, so mixing memory types prevents boot.

Verify ThinkStation P7 PX memory configuration

Confirm your workstation is a ThinkStation P7 or PX and that all eight slots can be populated with 4Rx4 registered modules. Registered ECC memory will not work in standard desktop motherboards.

How it compares

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

Price $28,406.99
Pricier than about 93% of the 21,161 comparable items (median $397.99).
Total capacity 1 TB (8 × 128 GB)
Higher than about 93% of the 20,941 comparable items (median 32 GB).
Price per GB $28.41 per GB
Pricier than about 80% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number4R8D54R41TBK
Total capacity1 TB (8 × 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 systemsLenovo ThinkStation P7
Lenovo ThinkStation PX

Other versions of this model

5 more in the same range

Questions about this item

How can I confirm the 1TB kit is running at DDR5 4800 CL40 after installation?

In the BIOS or UEFI, verify the memory speed shows 4800 MT/s and the CAS latency reads CL40; the modules operate at 1.1 V and are 4Rx4 registered ECC DIMMs.

What comes in the box and what must be purchased separately?

The kit includes eight 128 GB DDR5 4800 CL40 ECC registered RDIMMs; no extra cables, brackets or cooling parts are required for installation.

Which capacity version should I choose for a ThinkStation P7 or PX?

This is the 1 TB kit (8 × 128 GB); select it when you need the maximum supported capacity for those workstations.

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