Corsair

Corsair CMT64GX5M2B6000Z40 64GB

Key Specs:: DDR5 / 64GB (2x32GB) / 6000MT/s CL40

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Manufacturer: Corsair Last updated: 2026-09-14

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Corsair CMT64GX5M2B6000Z40 64GB Review

The Corsair CMT64GX5M2B6000Z40 is a 64GB (2x32GB) DDR5-6000 CL40 kit from Corsair's Dominator Platinum RGB line.

6000MT/s keeps AM5's fabric ratio at 1:1, but CL40 is a loose timing for that speed, this is essentially the same kit as Corsair's CMT64GX5M2B6000C40, just listed separately, and both trail the CL30 version's 10.0ns true latency by a wide margin.

Performance

13.3ns true latency at 6000MT/s CL40 is a middling result for this speed. The 64GB total capacity is the strongest selling point.

Compatibility

6000MT/s runs cleanly on AM5's 1:1 fabric ratio and on Intel boards without issue.

Speed and Latency

True latency is CAS latency divided by half the transfer rate: 40 / (6000 / 2) x 1000 = 13.3ns. That sits on the loose end: 83% of the desktop DDR5 kits we track match or beat it.

Our verdict

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

Best for

64GB AM5 builds prioritizing capacity over tightest timings

Not for

Buyers who can find the CL30 version of this kit for close to the same price

Specifications

What these specs mean

Speed Score

7.0/10

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

Identity

Peak Bandwidth	96.0 GB/s
Brand	Corsair
Part Number	CMT64GX5M2B6000Z40

Memory

DDR Generation	DDR5
Capacity	64 GB
Speed	6000 MT/s
CAS Latency	40
Module Count	2

Physical

RGB Lighting	Yes

Module and platform

RAM Segment	Desktop DDR5
Form Factor	Desktop DIMM
Platform Optimisation	AM5

Capacity

Capacity Per Module	32 GB

Speed and timings

True Latency	13.3 ns

Overclocking profile

XMP Support	No
EXPO Support	Yes

Silicon

Memory IC	Undisclosed

FAQs

What are the key specifications of the Corsair CMT64GX5M2B6000Z40 64GB (2x32GB)?

Key specs for the Corsair CMT64GX5M2B6000Z40 64GB: Capacity Per Module 32 GB, Capacity 64 GB, Speed 6000 MT/s, OC Profile EXPO, DDR Generation DDR5, Part Number CMT64GX5M2B6000Z40.

Will the Corsair CMT64GX5M2B6000Z40 64GB (2x32GB) work with my current setup?

The Corsair CMT64GX5M2B6000Z40 64GB (2x32GB) 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 CMT64GX5M2B6000Z40 64GB (2x32GB) best suited to?

Best suited to: 64GB AM5 builds prioritizing capacity over tightest timings.

What are the drawbacks of the Corsair CMT64GX5M2B6000Z40 64GB (2x32GB)?

Not the best fit for: Buyers who can find the CL30 version of this kit for close to the same price.