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Green printed circuit board with black memory chips on both sides, gold edge connector, no heat spreader

OWC

OWC 4E8D51R816GB 16GB DDR5 4800 ECC Unbuffered UDIMM

SKU CH-QW4R-05ZDP

Adds 16 GB of DDR5 4800 ECC unbuffered memory for workstations, servers and NAS systems

  • Capacity16GB
  • SpeedDDR5 4800 (PC5 38400)
  • CAS LatencyCL40
  • Voltage1.1V
  • ECCYes
  • Buffered/RegisteredUnbuffered

Capacity 16GB

  • ECC protection guards data integrity in critical workloads
  • 16 GB capacity expands multitasking headroom for workstations
  • DDR5 4800 speed delivers high bandwidth for demanding applications
  • 1 V operation reduces power draw and heat output
  • 288-pin UDIMM fits standard desktop and server slots

Capacity and purpose

This 16 GB DDR5 module delivers ECC unbuffered memory for workstations, servers and NAS systems. It targets users who need error correction without registered buffering overhead.

Sustained-load behaviour

The JEDEC-standard CL40 timing and 1.1 V operation keep latency predictable during long compute or storage tasks. ECC protection corrects single-bit errors in real time, preventing silent data corruption under continuous load.

Upgrade context

It replaces non-ECC or lower-capacity DDR5 DIMMs in platforms that accept 288-pin unbuffered modules. The jump is worthwhile when data integrity matters more than raw bandwidth and the system supports ECC unbuffered operation.

Highlights

  • ECC protection guards data integrity in critical workloads
  • 16 GB capacity expands multitasking headroom for workstations
  • DDR5 4800 speed delivers high bandwidth for demanding applications
  • 1 V operation reduces power draw and heat output
  • 288-pin UDIMM fits standard desktop and server slots

Specifications

BrandOWC
Part Number4E8D51R816GB
Capacity16GB
SpeedDDR5 4800 (PC5 38400)
CAS LatencyCL40
Voltage1.1V
ECCYes
Buffered/RegisteredUnbuffered
ColorBlack
Heat SpreaderNo
Recommend UseWorkstations, Servers, and NAS Systems
LED ColorNone

Other versions of this model

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Questions about this item

Will this 16 GB DDR5 module fit a standard 288-pin desktop motherboard?

Yes, it uses the 288-pin unbuffered DIMM form factor designed for DDR5 desktop, workstation and NAS boards.

Does the motherboard need to support ECC for this stick to work?

The module is ECC unbuffered; it will only provide error correction on platforms that enable ECC in the BIOS, otherwise it runs as non-ECC memory.

What voltage does the kit require and is it JEDEC standard?

It operates at 1.1 V and is fully compliant with JEDEC DDR5 4800 PC5-38400 specifications.

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