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Corsair Vengeance CMK128GX5M4B5600C40 (128GB 4x32GB Kit/DDR5 5600MHz/CL40/1.25V/No RGB Anodized Aluminium/Intel XMP 3.0) DDR5 memory kit
Corsair

Corsair Vengeance CMK128GX5M4B5600C40

Expert rating8 / 10

View on Corsair StoreView on corsair.com
DDR Generation:
DDR5
Capacity:
128GB
Speed:
5600MT/s
CAS Latency:
CL40
Module Count:
4
Colour:
Black

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Manufacturer: Corsair Last updated: 2026-09-12

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Corsair Vengeance CMK128GX5M4B5600C40 Review

Corsair Vengeance CMK128GX5M4B5600C40 is a 128GB (4x32GB) DDR5-5600 CL40 quad-kit with no RGB lighting, black anodized aluminum heat spreader, Intel XMP 3.0.

128GB across four matched 32GB modules is squarely workstation territory, aimed at professionals running large virtual machine clusters, in-memory databases, or heavy 3D and video work where capacity outweighs the last few hundred megatransfers of speed. Corsair validates all four sticks together at 5600MHz, avoiding the common headache of mismatched quad-channel kits refusing to hit their rated speed.

Why Buy It

128GB across four factory-matched modules is validated as one set, avoiding the common problem of combining two separate dual-kits that won't reliably hit their rated XMP speed together when all four slots are populated.

Speed and Latency

True latency is CAS latency divided by half the transfer rate: 40 / (5600 / 2) x 1000 = 14.3ns. 89% of the desktop DDR5 kits we list are as tight or tighter, so this is on the looser side of its class.

Our verdict

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

Expert rating8 / 10

A properly validated 128GB workstation kit, without paying for RGB lighting a server room will never see.

Best for

  • Professional workstations running VMs or in-memory databases
  • 3D rendering and large-dataset video editing rigs
  • Four-DIMM-slot boards needing maximum practical capacity

Not for

  • Gaming-focused builds (128GB is far more than games use)
  • Two-slot ITX boards
  • Budget builds

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 NumberCMK128GX5M4B5600C40
SeriesVengeance

Memory

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

Physical

RGB LightingNo

Module and platform

RAM SegmentDesktop DDR5
Form FactorStandard DIMM
Platform OptimisationAM5

Capacity

Capacity Per Module32 GB

Speed and timings

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 Vengeance CMK128GX5M4B5600C40 (128GB 4x32GB Kit/DDR5 5600MHz/CL40/1.25V/No RGB Anodized Aluminum/Intel XMP 3.0)?

Key specs for the Corsair Vengeance CMK128GX5M4B5600C40: Capacity Per Module 32 GB, Capacity 128 GB, Speed 5600 MHz, OC Profile XMP 3.0, Voltage 1.25 V, DDR Generation DDR5.

Will the Corsair Vengeance CMK128GX5M4B5600C40 (128GB 4x32GB Kit/DDR5 5600MHz/CL40/1.25V/No RGB Anodized Aluminum/Intel XMP 3.0) work with my current setup?

The Corsair Vengeance CMK128GX5M4B5600C40 (128GB 4x32GB Kit/DDR5 5600MHz/CL40/1.25V/No RGB Anodized Aluminum/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 Vengeance CMK128GX5M4B5600C40 (128GB 4x32GB Kit/DDR5 5600MHz/CL40/1.25V/No RGB Anodized Aluminum/Intel XMP 3.0) best suited to?

Best suited to: Professional workstations running VMs or in-memory databases; 3D rendering and large-dataset video editing rigs; Four-DIMM-slot boards needing maximum practical capacity.

What are the drawbacks of the Corsair Vengeance CMK128GX5M4B5600C40 (128GB 4x32GB Kit/DDR5 5600MHz/CL40/1.25V/No RGB Anodized Aluminum/Intel XMP 3.0)?

Not the best fit for: Gaming-focused builds (128GB is far more than games use); Two-slot ITX boards; Budget builds.

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