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Manufacturer: Corsair Last updated: October 6, 2026
Corsair CMK32GX5M2B6000C40 Review
Corsair's CMK32GX5M2B6000C40 is a 32GB (2x16GB) DDR5-6000 desktop memory kit rated CL40, for a true latency of 13.3ns.
Speed and Latency
Speed and CL only mean something together: 40 cycles at 6000MT/s is 13.3ns of real delay. That sits on the loose end: 83% of the desktop DDR5 kits we track match or beat it.
Platform Fit
This is for DDR5 desktops: AMD AM5 on 600 or 800 series chipsets, and Intel 600, 700 or 800 series boards with DDR5 slots. It physically will not go into a DDR4 board. For Ryzen 7000 and 9000, 6000MT/s is the speed to aim for: the controller stays 1:1 with the memory. Profiles: XMP 3.0.
Capacity and Configuration
The two 16GB modules give you dual channel with two slots used. If you might want more memory later, buy the bigger two-stick kit now. Four DDR5 modules rarely hold their rated speed. 32GB is the comfortable amount for gaming and creative work in 2026.
Build and Cooling
Corsair does not publish the module height, so check your cooler's RAM clearance if you use a large air cooler. Corsair does not say whose DRAM chips are inside, so manual tuning headroom is unknown.
Speed Score
It scores 7 out of 10 on our DDR5 Speed Score, which weighs transfer rate and true latency against every other DDR5 kit we list. Do not compare it with DDR4 scores.
Our verdict
Reviewed by Burooj Alam. Rated by us, not by users.
Best for
- AM5 builds that want the 6000MT/s 1:1 sweet spot
Not for
- Latency-focused builds: 83% of desktop DDR5 kits are as tight or tighter
- Manual timing tuning: memory chips are not disclosed
- Adding a second kit later for four sticks
Specifications
What these specs meanHow fast this kit is among DDR5 kits, rated from its speed and latency.
Identity
| Peak Bandwidth | 96.0 GB/s |
|---|---|
| Brand | Corsair |
| Part Number | CMK32GX5M2B6000C40 |
Memory
| DDR Generation | DDR5 |
|---|---|
| Capacity | 32 GB |
| Speed | 6000 MT/s |
| CAS Latency | 40 |
| Module Count | 2 |
Module and platform
| RAM Segment | Desktop DDR5 |
|---|---|
| Form Factor | Desktop DIMM |
| Platform Optimisation | AM5 |
Capacity
| Capacity Per Module | 16 GB |
|---|
Speed and timings
| True Latency | 13.3 ns |
|---|
Overclocking profile
| XMP Support | Yes |
|---|---|
| XMP Version | XMP 3.0 |
| EXPO Support | No |
Silicon
| Memory IC | Undisclosed |
|---|
FAQs
Is the Corsair CMK32GX5M2B6000C40 compatible with my motherboard?
It fits DDR5 desktop boards (AMD AM5, Intel 600, 700 and 800 series with DDR5 slots). It does not fit DDR4 boards.
How fast is CL40 at 6000MT/s in real terms?
It works out to 13.3ns true latency. That is tighter than 17% of the desktop DDR5 kits we list.
Can I add a second kit later for four sticks?
It is not recommended. Four DDR5 sticks usually run well below their rated speed. Buy the total capacity you need as one two-stick kit.
Is 6000MT/s good for AMD Ryzen 7000 and 9000?
Yes. 6000MT/s lets the memory controller run 1:1 with the memory on AM5, the best balance of speed and latency.
Compare and read more
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