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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

  • Total capacity16 GB
  • Rated speedDDR5 4800 (PC5 38400)
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeUnbuffered
  • Recommended forWorkstations, Servers, and NAS Systems

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.

How it compares

Measured against everything we stock in Desktop RAM, at today’s prices. Recalculated every night.

Price $385.99
Pricier than about 80% of the 3,647 comparable items (median $90.99).
Total capacity 16 GB
Typical for this category: the median of 3,251 items is 16 GB.
Price per GB $24.12 per GB
Pricier than about 90% of the 3,251 comparable items (median $6.75 per GB).

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Specifications

Product
Brand nameOWC
Part number4E8D51R816 GB
Total capacity16 GB
Product colorBlack
Performance
Rated speedDDR5 4800 (PC5 38400)
Memory
CAS latencyCL40
ECC supportYes
Buffer typeUnbuffered
Heat spreaderNo
Power
Rated voltage1.1 V
Compatibility
Recommended forWorkstations, Servers, and NAS Systems
More details
LED lightingNone

Other versions of this model

5 more in the same range

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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