Crucial CP16G56C46U5.M8B2 16GB
- Capacity:
- 16GB
- Speed:
- 5600MT/s
- CAS Latency:
- CL46
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Manufacturer: Crucial Last updated: 2026-09-14
Crucial CP16G56C46U5.M8B2 16GB Review
The Crucial CP16G56C46U5.M8B2 is a Crucial Pro 16GB DDR5-5600 CL46 module, dual XMP 3.0/EXPO certified with the black heat spreader Crucial's Pro line uses.
We'd recommend it as a single-slot 16GB upgrade when you want certified one-click overclocking without buying the plain, uncertified CT-series version.
Performance
5600MT/s CL46 gives about 16.4ns of true latency, and the dual XMP 3.0/EXPO certification means it hits that speed automatically on either Intel or AMD platforms rather than defaulting to JEDEC speeds like Crucial's bare CT-series parts.
Comparison to Alternatives
Crucial's own bare CT16G56C46U5.M8D1 is the identical spec without certification or a heat spreader for less money, this Pro version is worth it if you value the one-click overclock. Against Crucial Pro CP32G56C46U5.C16B2 (same speed/CL, double the capacity), step up if your build needs more than 16GB.
Specifications
Identity
| Brand | Crucial |
|---|---|
| Part Number | CP16G56C46U5.M8B2 |
| Series | Crucial Pro |
Memory
| DDR Generation | DDR5 |
|---|---|
| Capacity | 16 GB |
| Speed | 5600 MT/s |
| CAS Latency | 46 |
| Module Count | 1 |
| Voltage | 1.1 V |
Physical
| Form Factor | Desktop DIMM |
|---|---|
| RGB Lighting | No |
Module and platform
| RAM Segment | Desktop DDR5 |
|---|
Capacity
| Capacity Per Module | 16 GB |
|---|
Speed and timings
| True Latency | 16.4 ns |
|---|
Silicon
| Memory IC | Micron |
|---|---|
| ECC | No |
Physical and lighting
| Colour | Black |
|---|
Commercial
| Warranty | Limited Lifetime |
|---|
| Model Number | CP16G56C46U5.M8B2 |
|---|---|
| OC Profile | XMP 3.0 + EXPO |
| Spec Score | 3.2 |
Expert Review
Reviewed by Burooj Alam. Rated by us, not by users.
Best for
- Single-slot 16GB desktop upgrades wanting certified XMP/EXPO
- Buyers who prefer the Pro line's heat-spreader looks over bare CT modules
Not for
- Builds with two free slots better served by a matched kit
- RGB-themed builds
FAQs
What are the key specifications of the Crucial CP16G56C46U5.M8B2 16GB?
The Crucial CP16G56C46U5.M8B2 16GB is a memory kit from Crucial. Key specs: DDR Generation DDR5, Capacity 16GB, Speed 5600MT/s, CAS Latency 46, Module Count 1.
Will the Crucial CP16G56C46U5.M8B2 16GB work with my current setup?
The Crucial CP16G56C46U5.M8B2 16GB 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 Crucial CP16G56C46U5.M8B2 16GB best suited to?
It suits single-slot 16gb desktop upgrades wanting certified xmp/expo, buyers who prefer the pro line's heat-spreader looks over bare ct modules.
What are the drawbacks of the Crucial CP16G56C46U5.M8B2 16GB?
It is a poor fit for builds with two free slots better served by a matched kit, rgb-themed builds.