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Four green DDR5 RDIMM modules in anti-static tray

OWC

OWC 256GB (4x64GB) DDR5 4800 CL40 ECC Registered RDIMM memory upgrade ThinkStation P5

SKU CH-EY1E-Q3JAE

256 GB kit of four 64 GB DDR5 4800 CL40 ECC registered RDIMMs for Lenovo ThinkStation P5 workstations

  • Capacity256GB (4 x 64GB)
  • Type288-Pin DDR5 ECC RDIMM
  • SpeedDDR5 4800 (PC5 38400)
  • CAS LatencyCL40
  • Voltage1.1V
  • ECCYes

Capacity 256GB (4 x 64GB)

  • 256 GB total capacity from four 64 GB modules
  • DDR5 4800 MT/s speed with CL40 latency
  • ECC registered design detects and corrects data errors
  • 1 V operation reduces power draw
  • JEDEC and RoHS compliant for warranty-safe upgrades

OWC 256GB DDR5 ECC RDIMM kit

This kit supplies 256GB across four 64GB DDR5 4800 CL40 registered ECC modules built for the Lenovo ThinkStation P5 workstation. It targets professionals who need maximum registered memory capacity for error-correcting workloads on that specific platform.

Simple DIMM installation with registered constraints

Modules seat in the standard 288-pin slots using 1.1V power, but the registered ECC design prevents mixing with unbuffered or load-reduced DIMMs. Install all four sticks together to avoid rank or buffering mismatches that stop the system from posting.

Verify ThinkStation P5 registered ECC support

Confirm the workstation accepts 2Rx4 registered DDR5 at 4800 MT/s and that the BIOS recognises the full 256GB population. Standard desktop boards and consumer DDR5 will not work with this registered kit.

Helstu kostir

  • 256 GB total capacity from four 64 GB modules
  • DDR5 4800 MT/s speed with CL40 latency
  • ECC registered design detects and corrects data errors
  • 1 V operation reduces power draw
  • JEDEC and RoHS compliant for warranty-safe upgrades

Tæknilýsing

BrandOWC
Part Number4R8D52R4256S
Capacity256GB (4 x 64GB)
Type288-Pin DDR5 ECC RDIMM
SpeedDDR5 4800 (PC5 38400)
CAS LatencyCL40
Voltage1.1V
ECCYes
Buffered/RegisteredRegistered
Rank2Rx4
Heat SpreaderNo
Compatible SystemLenovo ThinkStation P5

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How do I confirm the kit is running at DDR5 4800 CL40 after installation?

Open the BIOS or a tool such as CPU-Z and verify the memory speed reads 4800 MT/s with CAS latency 40; the modules operate at 1.1 V and are registered ECC, so the firmware will show them as RDIMM.

What ships in the box and do I need any extra parts?

The package contains four 64 GB DDR5 4800 CL40 2Rx4 registered ECC RDIMMs (part 4R8D52R4256S) for a total of 256 GB; no cables, brackets or additional hardware are required for a ThinkStation P5.

Why choose this 256 GB (4 x 64 GB) kit over a smaller capacity?

It fills four slots with 64 GB modules, delivering the full 256 GB at DDR5 4800 CL40 in a matched set that is validated for the ThinkStation P5 and avoids mixing registered ECC with unbuffered or load-reduced memory.

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