We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Four green DDR5 RDIMM modules with gold contacts and black chips, no heat spreaders

OWC

OWC 512GB (4x128GB) DDR5 4800 CL40 ECC RDIMM Kit

SKU CH-KAAW-JA7Z9

Four 128 GB DDR5 4800 CL40 ECC registered RDIMMs totalling 512 GB for Lenovo ThinkStation P7 and PX workstations

  • Capacity512GB (4 x 128GB)
  • Type288-Pin DDR5 ECC RDIMM
  • SpeedDDR5 4800 (PC5 38400)
  • CAS LatencyCL40
  • Voltage1.1V
  • ECCYes

Capacity 512GB (4 x 128GB)

  • ECC registered design protects data integrity in workstations
  • 512 GB total capacity across four 128 GB modules
  • DDR5 4800 speed with CL40 latency for responsive performance
  • 1 V operation reduces power draw per module
  • Validated for Lenovo ThinkStation P7 and PX systems

OWC 512GB DDR5 ECC RDIMM kit

This 512GB kit contains four 128GB DDR5 4800 CL40 registered ECC modules built for Lenovo ThinkStation P7 and PX workstations. The 288-pin RDIMMs operate at 1.1V and follow JEDEC PC5-38400 specifications for server-class reliability.

Registered ECC design for workstation stability

Registered buffering and on-die ECC correct single-bit errors and reduce electrical load on the memory controller, a requirement for the ThinkStation P7 and PX platforms. The modules lack heat spreaders, so airflow in the chassis must be sufficient for sustained loads.

Four-module population fills four slots

The kit supplies exactly four 4Rx4 DIMMs, allowing a single-step upgrade to 512GB without mixing ranks or speeds. It cannot be combined with unbuffered or load-reduced ECC memory, so buyers needing different capacities or form factors must look elsewhere.

Highlights

  • ECC registered design protects data integrity in workstations
  • 512 GB total capacity across four 128 GB modules
  • DDR5 4800 speed with CL40 latency for responsive performance
  • 1 V operation reduces power draw per module
  • Validated for Lenovo ThinkStation P7 and PX systems

Specifications

BrandOWC
Part Number4R8D54R4512S
Capacity512GB (4 x 128GB)
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

Other versions of this model

5 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

What speed does DDR5 4800 CL40 cap at in practice?

The modules run at DDR5 4800 (PC5-38400) with CL40 latency, so the data rate is limited to 4800 MT/s by the JEDEC specification.

What physical slot and clearance does a 288-pin ECC RDIMM need?

Each stick is a standard 288-pin DDR5 RDIMM with no heat spreader, so it fits any DDR5 RDIMM slot and requires only normal DIMM-height clearance.

How is the 4-module kit installed, and what step do people get wrong?

Populate all four slots in the ThinkStation P7 or PX using the manufacturer’s recommended slot order; the common mistake is mixing these registered DIMMs with unbuffered or load-reduced memory, which will not work.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.