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Crucial

Crucial Pro DDR5 RAM 64GB Kit (2x32GB) 6400MHz CL40, Overclocking Desktop Gaming Memory, Intel XMP 3.0 & AMD Expo Compatible – Black CP2K32G64C40U5B

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Arrives Thursday, Jul 30
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Size: Black 64GB Kit (2x32GB)


Style: 6400 CL40


Features

  • COOL BLACK LOOK & FEEL: Our DDR5 Pro Overclocking Memory features a black, aluminum heat spreader with a unique, origami-based design that is both cool to the touch and an aesthetic win for any rig
  • ACCELERATED PERFORMANCE: 6400MHz at CL40 for stable overclocking performance and 25% lower latency for higher frame rates per second. Every millisecond gained in fast-paced gameplay counts
  • INTEL & AMD COMPATIBLE: Compatible with Intel Core Ultra series 2 & 13-14th Gen desktop CPUs and above. Also, compatible with AMD Ryzen 9000 Series desktop CPUs and above (Verify compatibility with motherboard manufacturer)
  • FLEXIBILITY: By supporting both Intel XMP 3.0 and AMD EXPO on the same module, Crucial offers you ultimate flexibility with your build
  • MICRON QUALITY & RELIABILITY: With 45 years of memory expertise, Micron delivers cutting-edge engineering and superior component and module-level testing; including limited lifetime warranty

Description

Push performance to the next level with the blazing speed and massive bandwidth of Crucial DDR5 Pro OC Gaming Memory. With support for next-gen multi-core CPUs and the “sweet spot” speed of up to 6,400MHz, our gaming memory harnesses the power of low latency so you can beat the clock and focus on outplaying your opponent instead of worrying about performance bottlenecks. This powerful, flexible memory supports next-gen multi-core CPUs and stable overclocking with Intel XMP 3.0 and AMD EXPO. Available in black or white in 16GB or 32GB density modules with a unique, origami-inspired aluminum heat spreader for a winning aesthetic. Unlock a new world of gaming performance with Crucial DDR5 Pro Gaming Memory.

Brand: Crucial


Computer Memory Size: 64 GB


RAM Memory Technology: DDR5


Memory Speed: 6400 MHz


Compatible Devices: Desktop


RAM Memory Technology: DDR5


Memory Speed: 6400 MHz


Compatible Devices: Desktop


Additional Features: Auto-Overclocking


Voltage: 1.35 Volts


Column Address Strobe Latency: 40


Form Factor: DIMM


Data Transfer Rate: 6400 MHz


Number of Pins: 288


Memory Form Factor: DIMM, UDIMM


Memory Generation: DDR5


RAM Size: 64 GB


Brand: Crucial


Model Name: Pro DDR5 RAM 64GB Kit 6400MHz Overclocking Desktop Gaming Memory Black


UPC: 649528945709


Manufacturer: Crucial


Model Number: CP2K32G64C40U5B


Mfr Part Number: CP2K32G64C40U5B


Warranty Description: Limited Lifetime Warranty


Global Trade Identification Number: 09


Unit Count: 1.0 Count


Item Weight: 33 Grams


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Jul 30

This item is non-returnable:

This item is returnable

View our full returns policy here.

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Top Amazon Reviews

    • Sad to see Crucial go
Size: White 64GB Kit (2x32GB) Style: 6400 CL40
I've been using G.Skill memory for many years and been satisfied. I decided to get this Crucial memory just when memory prices began to soar. This one was significantly more cost effective then my typical choices at the time. I was pleased to find this works better with the motherboard I'm using in my primary system. With my previous memory, I would sometimes need to manually lower the speed slightly to maintain stability. This memory has not had the same issue. I just turn on EXPO (XMP) and it works. It has been flawless so far. I usually run 64GB in my system. I use it for both work and play. It is uncommon for me to use more than 32GB but when I do need it, there is no substitute. I chose the white sticks simply because the pricing was in flux and the white ones were a lot cheaper than the black ones at the time. Technically, black is better as it is capable of radiating more heat. However, I don't think it makes very much difference in this case. It is sad that I discovered how much I like Crucial memory at the same time they announced they will be exiting the consumer memory market in order to focus on supplying AI datacenters. ... show more
Reviewed in the United States on January 27, 2026 by Darrin J. Fangman
    • Quality RAM; However, only runs at 5600 on ACT1250. XMP not an option for Dell/Alienware. Quality RAM; However, only runs at 5600 on ACT1250. XMP not an option for Dell/Alienware.
Size: Black 64GB Kit (2x32GB) Style: 6400 CL40
Review Image by John
Review Image by John
Review Image by John
Review Image by John
Review Image by John
I ordered this RAM with the hopes that I would be able to utilized the XMP ability of the Alienware ACT1250. I ordered the system with 16GB of 5200 MT/s with the expectation of immediately swapping it out for a 64GB kit of this 6400 MT/s. Before I even turned on the system for the first time, I swapped out the RAM. I had no issues with the system booting up. I read some people had issues with the ACT1250 booting up to a 4k monitor. I only have a 1440p, so just something to be aware of if you have a higher res monitor. I felt like the look of this ram fits in better with my system with the included black heatsink. The Dell/Alienware is ridiculously picky with it's ability to enable XMP. Supposedly only a Kingston RAM kit that no one can seem to find anywhere online is the only one on their "Dell certified" XMP list. The Dell/Alienware motherboard won't allow XMP to be enabled. This memory runs at 5600MT/s out of the box for my ACT1250. CPU-Z does recognize that it has the ability of the XMP-6400 and XMP-6000 frequency. RAM has been running fine with no errors detected with MemTest86. I've been playing Killing Floor 3 paired with a RTX 5080 and Intel Core Ultra 7 265KF and had no issues at all. I wish I could get the memory running at the speed it was designed for, but that's a ridiculous compatibility mechanism implemented by Dell/Alienware, not Crucial. Screenshots included. ... show more
Reviewed in the United States on August 14, 2025 Reviewed in the United States on August 14, 2025 by John
    • Great quality
Size: White 64GB Kit (2x32GB) Style: 6400 CL40
I grabbed the Crucial Pro DDR5 64GB Kit (2x32GB) 6400MHz CL40 for my rig and it’s been excellent—fast, stable, and easy to set up right out of the box. Performance has been smooth across gaming and heavy multitasking, and the sleek low-profile design fits perfectly without clearance issues. Compared to my previous Corsair kit, this Crucial Pro feels more reliable and consistent, giving me better overall value and peace of mind for long-term use. ... show more
Reviewed in the United States on December 9, 2025 by Benjaman Adams
    • More speed for me.
Size: Black 64GB Kit (2x32GB) Style: 6400 CL40
works great
Reviewed in the United States on March 29, 2026 by Jeff Turcott
    • Great.
Size: White 64GB Kit (2x32GB) Style: 6400 CL40
Stable, fast, and looks sleek. 64GB is plenty for heavy multitasking and gaming. No issues hitting the advertised speeds with Expo enabled
Reviewed in the United States on February 17, 2026 by Chance Hyatt
    • Good
Size: Black 64GB Kit (2x32GB) Style: 6400 CL40
2x32 6400MHz @200$. 4 stars, CL40 is not the best (it is good). Was worth the cost at the time of purchase, not now (pushing five hundred).
Reviewed in the United States on November 17, 2025 by Contacted Tecnical Support
    • Rapidez
Size: White 64GB Kit (2x32GB) Style: 6400 CL40
Excelente, me ayudaron en la velocidad de procesos de mi pc, lamento no haber comprado otro par en su momento, llegaron en buenas condiciones
Reviewed in the United States on March 14, 2026 by Erik Pacheco
    • Worthless junk
Size: White 64GB Kit (2x32GB) Style: 6400 CL40
UPDATE: 5 months after purchasing one stick has completely failed. Only gets recognized as 4gb regardless of what slot it’s installed into. EXTREMELY upset as prices are through the roof now. Unreal. Crap quality, so glad they’re not producing any more consumer products; maybe now that they’re going commercial-only people can start being held accountable for garbage quality. Zero stars if I could. Works great, even though it's CL40 I have great performance with EXPO on. Sorry to anyone who didn't grab this before the price skyrocketed. What a shame. ... show more
Reviewed in the United States on December 10, 2025 by Cat

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