Corsair CMT64GX5M2B6000C40 64GB
- Summary:
- 64GB (2x32GB) DDR5-6000 CL40 Dominator Platinum RGB kit
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Manufacturer: Corsair Last updated: 2026-09-14
Corsair CMT64GX5M2B6000C40 64GB (2x32GB) Review
The Corsair CMT64GX5M2B6000C40 is a 64GB (2x32GB) DDR5-6000 CL40 kit from Corsair's Dominator Platinum RGB line.
6000MT/s keeps this on AM5's efficient 1:1 fabric ratio, but CL40 is a loose timing for that speed — 13.3ns true latency trails a CL30 6000MT/s kit like Corsair's own CMT64GX5M2B6000Z30 by a full 3.3ns at the same capacity and speed. It's still a solid 64GB option, just not the tightest-timed one Corsair sells at this speed.
Performance
At 6000MT/s CL40, true latency computes to 13.3ns. That's a middling result for 6000MT/s DDR5 — the same speed at CL30 gets to 10.0ns — but the 64GB capacity remains genuinely useful for heavy workloads regardless of timings.
Compatibility
6000MT/s is AM5's sweet spot, running the Infinity Fabric at 1:1 without the penalty that hits faster kits. It also runs cleanly on Intel platforms.
Comparison to Alternatives
Corsair's own CMT64GX5M2B6000Z30 matches this kit's capacity, speed, and Dominator Platinum RGB looks but with CL30 timings instead of CL40 — the better buy if the price gap is small.
Specifications
Identity
| Brand | Corsair |
|---|---|
| Part Number | CMT64GX5M2B6000C40 |
Memory
| DDR Generation | DDR5 |
|---|---|
| Capacity | 64 GB |
| Speed | 6000 MT/s |
| CAS Latency | 40 |
| Module Count | 2 |
Physical
| Form Factor | Desktop DIMM |
|---|---|
| RGB Lighting | Yes |
Module and platform
| RAM Segment | Desktop DDR5 |
|---|
Capacity
| Capacity Per Module | 32 GB |
|---|
Speed and timings
| True Latency | 13.3 ns |
|---|
Silicon
| Memory IC | Undisclosed |
|---|
Physical and lighting
| Colour | Black |
|---|
| Platform Sweet Spot | AM5 |
|---|---|
| Spec Score | 5.5 |
Expert Review
Reviewed by Burooj Alam. Rated by us, not by users.
Best for
- 64GB AM5 builds prioritizing capacity over the tightest timings
- Multitaskers and VM/content workloads needing high total capacity
Not for
- Buyers who can find the CL30 version of this same kit for similar money
- Latency-sensitive competitive gaming setups
FAQs
What are the key specifications of the Corsair CMT64GX5M2B6000C40 64GB (2x32GB)?
The Corsair CMT64GX5M2B6000C40 64GB (2x32GB) is a memory kit from Corsair. Key specs: DDR Generation DDR5, Capacity 64GB (2x32GB), Speed 6000MT/s, CAS Latency 40, Module Count 2.
Will the Corsair CMT64GX5M2B6000C40 64GB (2x32GB) work with my current setup?
The Corsair CMT64GX5M2B6000C40 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 CMT64GX5M2B6000C40 64GB (2x32GB) best suited to?
It suits 64gb am5 builds prioritizing capacity over the tightest timings, multitaskers and vm/content workloads needing high total capacity.
What are the drawbacks of the Corsair CMT64GX5M2B6000C40 64GB (2x32GB)?
It is a poor fit for buyers who can find the cl30 version of this same kit for similar money, latency-sensitive competitive gaming setups.
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