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Single green 288-pin DDR5 RDIMM module with black chips, no heat spreader

OWC

OWC 128GB DDR5 4800 CL40 4Rx4 288-pin 1.1V ECC Registered RDIMM ThinkStation P7 PX

SKU CH-AWY7-NVKVF

Single 128 GB DDR5-4800 ECC registered RDIMM with CL40 latency and 1.1 V operation for Lenovo ThinkStation P7 and PX workstations

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

Capacity 128GB

  • 128 GB capacity expands workstation memory headroom
  • DDR5 4800 speed with CL40 latency delivers high bandwidth
  • ECC registered design protects data integrity in critical workloads
  • 1 V operation reduces power draw per module
  • Validated for Lenovo ThinkStation P7 and PX systems

Targeted Workstation Upgrade

This OWC module adds 128GB of DDR5 ECC Registered memory to a Lenovo ThinkStation P7 or PX. It is a single 288-pin RDIMM rated at 4800 MT/s with CL40 latency and 1.1V operation. The 4Rx4 organisation suits high-capacity server and workstation configurations. It will not work in standard desktop PCs or alongside unbuffered or load-reduced DIMMs.

Thermals and Power

The module runs at the JEDEC standard 1.1V without a heat spreader, relying on the workstation's directed airflow for cooling. Registered buffering reduces electrical load on the memory controller, which helps maintain signal integrity across fully populated channels. Power draw scales with the 4800 MT/s data rate and 128GB density during sustained workloads.

Compatibility and Identification

This DIMM replaces Lenovo part numbers 4X71M22551, 4X77A77034 and 4X77A81443, simplifying ordering for approved configurations. OWC validates every unit in-house to JEDEC and RoHS specifications. The Advanced Replacement programme and lifetime warranty with free technical support cover the module for the life of the system.

Privalumai

  • 128 GB capacity expands workstation memory headroom
  • DDR5 4800 speed with CL40 latency delivers high bandwidth
  • ECC registered design protects data integrity in critical workloads
  • 1 V operation reduces power draw per module
  • Validated for Lenovo ThinkStation P7 and PX systems

Specifikacijos

BrandOWC
Part Number4R8D54R4128G
Capacity128GB
Type288-Pin DDR5 ECC RDIMM
SpeedDDR5 4800 (PC5 38400)
CAS LatencyCL40
Voltage1.1V
ECCYes
Buffered/RegisteredRegistered
Rank4Rx4
Heat SpreaderNo
Compatible SystemLenovo ThinkStation P7
Lenovo ThinkStation PX

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How do I install the 288-pin DDR5 ECC RDIMM in my ThinkStation P7 or PX, and what step do people often get wrong?

Align the notch on the module with the slot key, press firmly until both retention clips click, and ensure the system is fully powered off and unplugged; the step often missed is verifying the motherboard requires registered ECC memory and not mixing it with unbuffered or load-reduced DIMMs.

What maintenance or replacement will the 128GB 4Rx4 module need over time?

No routine maintenance is required; the module is a solid-state component with no moving parts, and OWC provides a limited lifetime warranty with an advanced replacement program should a fault develop.

What limit appears first when the 4800 CL40 RDIMM runs under sustained heavy workloads?

The registered buffer adds one clock cycle of latency, so the CL40 timing and 1.1V operation define the performance ceiling before thermal or signal-integrity constraints become factors.

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