OWC

OWC 32GB DDR5-4800 ECC UDIMM

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Manufacturer: OWC Last updated: September 11, 2026

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OWC 32GB DDR5-4800 ECC UDIMM Review

The OWC 32GB DDR5-4800 ECC UDIMM targets Mac Pro and other DDR5 ECC UDIMM workstations specifically, extending OWC's long-running Apple-adjacent memory and storage upgrade business into current-generation ECC workstation memory.

True side-band ECC error correction in a dual-rank unbuffered DDR5 module, certified by OWC specifically for Mac Pro workstation configurations that require verified compatible memory rather than generic PC modules. For Mac Pro (2023 and later Intel-compatible workstation configurations) and other DDR5 ECC UDIMM workstations requiring verified Mac-compatible memory. Against the Micron (Crucial) MTC20C2085S1EC48BA1R, covered elsewhere on this site, both share the same core DDR5-4800 ECC UDIMM specification, with this OWC module specifically certified for Mac Pro compatibility. Against the Kingston Server Premier KSM56E46BD8KM-32HA, also covered elsewhere on this site, that module targets PC-based Threadripper and Xeon W platforms rather than Mac Pro.

ECC and Unbuffered Operation

Compatibility

For Mac Pro (2023 and later Intel-compatible workstation configurations) and other DDR5 ECC UDIMM workstations requiring verified Mac-compatible memory.

Comparison to Alternatives

Against the Micron (Crucial) MTC20C2085S1EC48BA1R, covered elsewhere on this site, both share the same core DDR5-4800 ECC UDIMM specification, with this OWC module specifically certified for Mac Pro compatibility. Against the Kingston Server Premier KSM56E46BD8KM-32HA, also covered elsewhere on this site, that module targets PC-based Threadripper and Xeon W platforms rather than Mac Pro.

Our verdict

Reviewed by Burooj Alam. Rated by us, not by users.

Best for

Mac Pro owners and creative professionals who need OWC-certified ECC memory for their specific workstation. This module's Mac Pro certification addresses a compatibility requirement PC-focused ECC modules don't specifically verify.

Not for

Not for PC-based Threadripper or Xeon W workstation builders. The Kingston or Micron equivalents, both covered elsewhere on this site, target that platform instead.

Specifications

What these specs mean

Identity

Peak Bandwidth	38.4 GB/s
Brand	OWC
Part Number	OWC 32GB DDR5-4800 ECC UDIMM
Series	OWC ECC UDIMM

Memory

DDR Generation	DDR5
Capacity	32 GB
Speed	4800 MT/s
CAS Latency	40
Voltage	1.1 V

Module and platform

RAM Segment	Server
Buffering	No, Unbuffered (UDIMM)
Pin Count	288
Platform Optimisation	Mac Pro (2023+), DDR5 ECC UDIMM Workstations

Capacity

Capacity Per Module	32 GB
Module Count	1
Ranks Per Module	2Rx8 (Dual Rank, x8)

Speed and timings

True Latency	16.7 ns

Commercial

Warranty	Limited Lifetime

FAQs

What are the key specifications of the OWC 32GB DDR5-4800 ECC UDIMM (32GB DDR5-4800 ECC UDIMM/CL40/2Rx8/1.1V/288-Pin/Mac Pro Compatible)?

Key specs for the OWC 32GB DDR5-4800 ECC UDIMM: Capacity Per Module 32 GB, Capacity 32 GB, Speed 4800 MHz, Voltage 1.1 V, DDR Generation DDR5, Kit Configuration 1 x 32GB.

Will the OWC 32GB DDR5-4800 ECC UDIMM (32GB DDR5-4800 ECC UDIMM/CL40/2Rx8/1.1V/288-Pin/Mac Pro Compatible) work with my current setup?

The OWC 32GB DDR5-4800 ECC UDIMM (32GB DDR5-4800 ECC UDIMM/CL40/2Rx8/1.1V/288-Pin/Mac Pro Compatible) lists DDR Generation is DDR5. Check that against the hardware you already own before buying, since this is the field that most often decides whether a part fits. Our upgrade checker at /upgrade can confirm compatibility for common combinations.

Who is the OWC 32GB DDR5-4800 ECC UDIMM (32GB DDR5-4800 ECC UDIMM/CL40/2Rx8/1.1V/288-Pin/Mac Pro Compatible) best suited to?

Best suited to: Mac Pro owners and creative professionals who need OWC-certified ECC memory for their specific workstation. This module's Mac Pro certification addresses a compatibility requirement PC-focused ECC modules don't specifically verify.

What are the drawbacks of the OWC 32GB DDR5-4800 ECC UDIMM (32GB DDR5-4800 ECC UDIMM/CL40/2Rx8/1.1V/288-Pin/Mac Pro Compatible)?

Not the best fit for: Not for PC-based Threadripper or Xeon W workstation builders. The Kingston or Micron equivalents, both covered elsewhere on this site, target that platform instead.