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Corsair Dominator Platinum RGB CMT128GX5M4B5600C40 (128GB (4x32GB)/DDR5 5600MHz/CL40/1.25V/RGB Black/Intel XMP 3.0) DDR5 memory kit
Corsair

Corsair Dominator Platinum RGB CMT128GX5M4B5600C40

View on corsair.com
DDR Generation:
DDR5
Capacity:
128GB (4x32GB)
Speed:
5600MT/s
CAS Latency:
40
Form Factor:
UDIMM
RGB Lighting:
Yes
Colour:
Black

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Manufacturer: Corsair Last updated: October 9, 2026

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Corsair Dominator Platinum RGB CMT128GX5M4B5600C40 Review

Corsair Dominator Platinum RGB 128GB (4x32GB) DDR5 kit at 5600MT/s CL40, Corsair's flagship DDR5 memory with a NACA-inspired heatspreader and twelve-zone Capellix RGB.

Dominator Platinum RGB is Corsair's premium DDR5 line, pairing a NACA-inspired aluminum heatspreader and a dual-sided Dominator PCB with twelve-zone Capellix RGB lighting; this 128GB (4x32GB) kit is factory-tuned to 5600MT/s CL40 for enthusiasts who want top-tier stability and looks.

Performance

Running at 5600MT/s with a CL40 timing (14.3ns true latency), this 128GB (4x32GB) DDR5 kit is validated at 1.25V via Intel XMP 3.0 for one-click stable overclocking on compatible motherboards.

Compatibility

Ships as 4 modules in a UDIMM package, fitting standard desktop motherboards; check CPU cooler clearance for taller heatspreader designs.

Use Case

Built for high-end gaming and content creation rigs where 128GB (4x32GB) of premium, RGB-lit DDR5 is the centerpiece of the build.

Our verdict

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

Best for

  • High-end gaming and content creation rigs
  • Enthusiasts wanting premium build quality

Not for

  • Budget builds
  • DDR4 platforms

Specifications

What these specs mean
Speed Score
6.3/10

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

Identity

Peak Bandwidth89.6 GB/s
BrandCorsair
Part NumberCMT128GX5M4B5600C40
SeriesDominator Platinum RGB

Memory

DDR GenerationDDR5
Capacity128 GB
Speed5600 MT/s
CAS Latency40
Module Count4
Voltage1.25 V

Physical

RGB LightingYes

Module and platform

RAM SegmentDesktop DDR5
Form FactorUDIMM
Platform OptimisationIntel

Capacity

Capacity Per Module32 GB

Speed and timings

Timing String40-40-40-77
True Latency14.3 ns

Overclocking profile

XMP SupportYes
XMP VersionXMP 3.0
EXPO SupportNo

Silicon

Memory ICUndisclosed
ECCNo

Physical and lighting

ColourBlack

Commercial

WarrantyLimited Lifetime

FAQs

What are the key specifications of the Corsair Dominator Platinum RGB CMT128GX5M4B5600C40 (128GB (4x32GB)/DDR5 5600MHz/CL40/1.25V/RGB Black/Intel XMP 3.0)?

Key specs for the Corsair Dominator Platinum RGB CMT128GX5M4B5600C40: Capacity Per Module 32 GB, Capacity 128 GB, Speed 5600 MT/s, OC Profile XMP 3.0, Voltage 1.25 V, DDR Generation DDR5.

Will the Corsair Dominator Platinum RGB CMT128GX5M4B5600C40 (128GB (4x32GB)/DDR5 5600MHz/CL40/1.25V/RGB Black/Intel XMP 3.0) work with my current setup?

The Corsair Dominator Platinum RGB CMT128GX5M4B5600C40 (128GB (4x32GB)/DDR5 5600MHz/CL40/1.25V/RGB Black/Intel XMP 3.0) 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 Dominator Platinum RGB CMT128GX5M4B5600C40 (128GB (4x32GB)/DDR5 5600MHz/CL40/1.25V/RGB Black/Intel XMP 3.0) best suited to?

Best suited to: High-end gaming and content creation rigs; Enthusiasts wanting premium build quality.

What are the drawbacks of the Corsair Dominator Platinum RGB CMT128GX5M4B5600C40 (128GB (4x32GB)/DDR5 5600MHz/CL40/1.25V/RGB Black/Intel XMP 3.0)?

Not the best fit for: Budget builds; DDR4 platforms.

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