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Eight black DDR5 UDIMM modules without heat spreaders

OWC

OWC 256GB (8x32GB) DDR5 5200 CL42 ECC Unbuffered UDIMM Kit

SKU CH-Z61S-CEAHN

A 256GB kit of eight 32GB DDR5 5200 CL42 ECC unbuffered UDIMMs at 1.1V for workstations, servers and NAS systems

  • Capacity256GB (8 x 32GB)
  • SpeedDDR5 5200 (PC5 41600)
  • CAS LatencyCL42
  • Voltage1.1V
  • ECCYes
  • Buffered/RegisteredUnbuffered

Capacity 256GB (8 x 32GB)

  • Massive 256GB capacity across eight 32GB modules for heavy workloads
  • DDR5 5200 speed with CL42 latency delivers responsive data access
  • ECC unbuffered design protects data integrity in workstations and servers
  • Low 1.1V operation reduces power draw and heat output
  • JEDEC compliant kit ensures warranty-safe upgrades for compatible systems

256 GB DDR5 ECC kit for workstations

This OWC kit supplies 256 GB of DDR5 memory in eight 32 GB unbuffered UDIMMs. It is built for workstations, servers and NAS systems that require error-correcting code protection. The modules run at the standard 1.1 V and carry JEDEC PC5-41600 certification.

Sustained load behaviour

ECC circuitry detects and corrects single-bit errors during continuous operation, helping data integrity in long-running workloads. The CL42 latency and 5200 MT/s rate are maintained under JEDEC voltage without overclocking headroom. Dual-rank 2Rx8 organisation supports steady throughput across all eight slots.

Compatibility checks before ordering

Verify that your motherboard accepts 288-pin DDR5 unbuffered ECC UDIMMs and can populate eight slots at 5200 MT/s. Confirm the platform supports 1.1 V operation and the total 256 GB capacity. Check that the BIOS is current enough for full-speed recognition of all modules.

Highlights

  • Massive 256GB capacity across eight 32GB modules for heavy workloads
  • DDR5 5200 speed with CL42 latency delivers responsive data access
  • ECC unbuffered design protects data integrity in workstations and servers
  • Low 1.1V operation reduces power draw and heat output
  • JEDEC compliant kit ensures warranty-safe upgrades for compatible systems

Specifications

BrandOWC
Part Number5E2D52R8256K
Capacity256GB (8 x 32GB)
SpeedDDR5 5200 (PC5 41600)
CAS LatencyCL42
Voltage1.1V
ECCYes
Buffered/RegisteredUnbuffered
Multi-channel KitDual Channel Kit
ColorBlack
Heat SpreaderNo
Recommend UseWorkstations, Servers, and NAS Systems
LED ColorNone

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Questions about this item

Will this kit fit a standard 288-pin DDR5 desktop DIMM slot?

Yes, each module uses the 288-pin unbuffered DDR5 form factor used by desktop, workstation, NAS and all-in-one systems.

Does the motherboard need to support ECC unbuffered memory for this kit to function?

The modules are ECC unbuffered; they require a platform that enables ECC on unbuffered DIMMs, otherwise they will run as non-ECC or not at all.

What voltage do the modules operate at and is it within the JEDEC DDR5 standard?

They run at 1.1 V, which is the standard JEDEC voltage for DDR5, and the kit is fully JEDEC-compliant.

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