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Corsair Dominator Platinum RGB CMT5S16G3A48C40A2 16GB DDR5 4800MHz CL40 desktop memory module, black, RGB
Corsair

Corsair CMT5S16G3A48C40A2 16GB

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Summary:
16GB DDR5-4800 CL40 Dominator Platinum RGB single module

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Manufacturer: Corsair Last updated: 2026-09-14

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Corsair CMT5S16G3A48C40A2 16GB Review

The Corsair CMT5S16G3A48C40A2 is a single 16GB DDR5-4800 CL40 Dominator Platinum RGB module, sold on its own rather than as a matched kit.

We'd only recommend this as a single-stick upgrade or a way to pad out a system that already has one Dominator Platinum RGB module installed, 4800MT/s CL40 is the base JEDEC-adjacent speed for DDR5, well below the 6000MT/s sweet spot most desktop boards run comfortably, and 16GB alone is thin for anything beyond light desktop use.

Performance

At 4800MT/s CL40, true latency comes out to 16.7ns, near the bottom of what DDR5 offers. This module is really about matching an existing single-stick system rather than delivering standout performance on its own.

Compatibility

Running as a single module means no dual-channel bandwidth benefit. If you're building fresh, a matched 2x16GB Dominator Platinum RGB kit at a higher rated speed (like Corsair's CMT32GX5M2E6000C36) will noticeably outperform two of these bought separately.

Our verdict

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

Best for

  • Matching or replacing a single failed module in an existing Dominator Platinum RGB build
  • Budget single-channel upgrades where RGB matching matters more than speed

Not for

  • New builds, buy a matched 2-module kit instead
  • Gaming or productivity rigs that benefit from dual-channel bandwidth

Specifications

What these specs mean
Speed Score
5.3/10

How fast this kit is among DDR5 kits, rated from its speed and latency.

Identity

Peak Bandwidth38.4 GB/s
BrandCorsair
Part NumberCMT5S16G3A48C40A2

Memory

DDR GenerationDDR5
Capacity16 GB
Speed4800 MT/s
CAS Latency40
Module Count1

Physical

RGB LightingYes

Module and platform

RAM SegmentDesktop DDR5
Form FactorDesktop DIMM
Platform OptimisationAM5

Capacity

Capacity Per Module16 GB

Speed and timings

True Latency16.7 ns

Overclocking profile

XMP SupportYes
XMP VersionXMP 3.0
EXPO SupportNo

Silicon

Memory ICUndisclosed

Physical and lighting

ColourBlack

FAQs

What are the key specifications of the Corsair CMT5S16G3A48C40A2 16GB?

Key specs for the Corsair CMT5S16G3A48C40A2 16GB: Capacity Per Module 16 GB, Capacity 16 GB, Speed 4800 MT/s, OC Profile XMP 3.0, DDR Generation DDR5, Part Number CMT5S16G3A48C40A2.

Will the Corsair CMT5S16G3A48C40A2 16GB work with my current setup?

The Corsair CMT5S16G3A48C40A2 16GB 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 Corsair CMT5S16G3A48C40A2 16GB best suited to?

Best suited to: Matching or replacing a single failed module in an existing Dominator Platinum RGB build; Budget single-channel upgrades where RGB matching matters more than speed.

What are the drawbacks of the Corsair CMT5S16G3A48C40A2 16GB?

Not the best fit for: New builds, buy a matched 2-module kit instead; Gaming or productivity rigs that benefit from dual-channel bandwidth.

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