Can I expect good speed performance from this RAM kit?

Yes, this RAM kit offers unstoppable speed up to 6,400MHz, which is ideal for memory-intensive AAA games and provides lower latency for higher frame rates.

Will this DDR5 memory be compatible with my 12th Gen Intel Core or AMD Ryzen 7000 Series desktop CPUs?

Yes, this DDR5 memory is compatible with 12th Gen Intel Core or AMD Ryzen 7000 Series desktop CPUs.

What is the voltage requirement for this memory module and how does it affect its performance?

The voltage requirement for this memory module is 1.35V.

Is this memory module buffered or unbuffered?

The memory module is unbuffered.

Does this memory module have a heat spreader?

Yes, this memory module has a heat spreader.

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Main image of Crucial Pro Overclocking 64GB (2 x 32GB) DDR5 6400 (PC5 51200) Desktop Memory Model CP2K32G64C40U5B

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Crucial Pro Overclocking 64GB (2 x 32GB) DDR5 6400 (PC5 51200) Desktop Memory Model CP2K32G64C40U5B

(96)(132) Write a Review

Capacity: 64GB (2 x 32GB)

32GB (2 x 16GB)
64GB (2 x 32GB)
16GB (1 x 16GB)

Speed: DDR5 6400 (PC5 51200)

DDR5 6400 (PC5 51200)
DDR5 6000 (PC5 48000)

CAS Latency|Color: CL40|Black

CL36|Black
CL36|White
CL38|Black
CL38|White
CL40|Black
CL40|White
CL32Black

DDR5 6400 (PC5 51200)
CAS Latency CL40
Voltage 1.35V

🔥Don't forget your OS, we have Windows 11 OEM, Download and USB versions available

Overview

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Model
Brand	Crucial
Series	Pro Overclocking
Model	CP2K32G64C40U5B
Part Number	CP2K32G64C40U5B

Details
Capacity	64GB (2 x 32GB)
Speed	DDR5 6400 (PC5 51200)
CAS Latency	CL40
Voltage	1.35V
ECC	No
Buffered/Registered	Unbuffered / Unregistered
Multi-channel Kit	Dual Channel Kit
BIOS/Performance Profile	Intel XMP 3.0 and AMD EXPO
Color	Black
Heat Spreader	Yes
Features	* UNSTOPPABLE SPEEED UP TO 6,400MHz: Every millisecond gained in fast-paced gameplay counts, so take advantage of lower latency for higher frame rates per second for a smoother gaming experience that’s ideal for memory-intensive AAA games * SLEEK, MATTE BLACK HEAT SPREADER: Our DDR5 Pro OC Gaming Memory features an aluminum heat spreader in matte black with a sleek, origami-based design that is both cool to the touch and an aesthetic win for any rig * FLEXIBLE COMPATIBILITY: Experience flexibility with memory that supports next-gen multi-core CPUs and stable overclocking with Intel® XMP 3.0 and AMD EXPO™ (Compatibility conditions apply. Verify compatibility with motherboard manufacturer.) * ENGINEERED WITH QUALITY AND RELIABILITY: With more than 45 years of memory expertise, Micron delivers cutting-edge engineering and superior component and module-level testing for all Crucial DRAM products.
Recommend Use	Compatible with 12th Gen Intel® Core™ or AMD RyzenTM 7000 Series Desktop CPUs and above
LED Color	None

Additional Information
First Listed on Newegg	October 05, 2026

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Crucial Pro Overclocking 64GB (2 x 32GB) DDR5 6400 (PC5 51200) Desktop Memory Model CP2K32G64C40U5B

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Item#: 9SIA12KM7S5170

Meet Your Seller

Crucial Pro Overclocking 64GB (2 x 32GB) DDR5 6400 (PC5 51200) Desktop Memory Model CP2K32G64C40U5B

Learn more about the Crucial CP2K32G64C40U5B

Customer Reviews of the Crucial CP2K32G64C40U5B

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Manufacturer Contact Info