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Crucial Pro Overclocking DDR5-6400 CL38 32GB (2x16GB) specifications and in-depth review

Crucial Pro Overclocking DDR5-6400 CL38 32GB (2x16GB)

Manufacturer: Crucial

The Crucial Pro Overclocking DDR5-6400 CL38 32GB (2x16GB) is a desktop memory kit designed for systems that support the DDR5 standard. It ships as a dual-module configuration, with each stick carrying 16GB of capacity, bringing the total to 32GB across two 288-pin DIMM slots. The modules feature an integrated heatsink and operate without RGB lighting, keeping the aesthetic straightforward.

Running at a tested speed of 6400 MHz, the kit operates with CL40 primary timings (40-40-40-84) and a true latency of 12.5 ns at 1.35V. Overclocking profiles are covered by both Intel XMP 3.0 and AMD EXPO, allowing supported motherboards to load the rated speeds automatically. The kit does not use Samsung B-Die ICs, does not support ECC, and stands 35 mm tall, which may be relevant for builds with low-clearance CPU coolers.

Pros
  • Supports both Intel XMP 3.0 and AMD EXPO, making it compatible with a wider range of motherboards for automatic speed configuration
  • Ships as a dual-channel kit, which is the standard configuration for getting full memory bandwidth on modern platforms
  • Includes an integrated heatsink, which helps with heat dissipation during sustained workloads
  • True latency of 12.5 ns reflects a reasonably tight relationship between clock speed and CAS latency at 6400 MHz
  • No RGB lighting means there is no added power draw or software dependency for lighting control
Cons
  • CL40 primary timings are relatively loose for a 6400 MHz kit, which affects the true latency figure
  • Does not support ECC, ruling it out for workloads or platforms that require error-correcting memory
  • At 35 mm tall, the heatsink height may cause clearance issues with larger air CPU coolers
  • Does not use Samsung B-Die ICs, which some users specifically seek out for manual overclocking headroom
Who is this for?

This kit is a solid fit for users building or upgrading a mainstream desktop system on a platform that supports Intel XMP 3.0 or AMD EXPO, as the automatic profile loading removes the need for manual tuning. The 32GB total capacity across two modules also makes it practical for content creation, heavy multitasking, or memory-intensive applications where a single-channel or lower-capacity setup would fall short. The heatsink and compact 35 mm height suit mid-tower builds where airflow is reasonable but cooler clearance is a consideration.

Who is this NOT for?

Users who require ECC memory support — such as those running workstation-grade or server-adjacent tasks that depend on error correction — will find this kit unsuitable, as ECC is not supported. Enthusiasts who prioritize tight sub-timings and manual overclocking potential may also be disappointed, since the CL40 timings are on the looser end for 6400 MHz and the modules do not use Samsung B-Die ICs, which are generally preferred for that kind of tuning. Builders working with very tall air coolers and limited DIMM clearance may also run into fitment issues given the heatsink's height.

Performance:

true latency 12.5 ns
memory speed (Tested Speed) 6400
memory speed (SPD) 6400 MHz
DDR memory version 5
CAS Latency (CL) 40
tRAS timing 84
tRCD timing 40
tRP timing 40

This DDR5 kit operates at a tested speed of 6400 MHz, which matches its SPD-rated speed, and carries a CAS latency of 40, translating to a true latency of 12.5 ns. The full primary timing sequence runs at 40-40-40-84, covering tRCD, tRP, and tRAS respectively, giving a complete picture of the memory's access timing profile.

General info:

form factor 288-pin DIMM
memory size (total) 2 x 16GB
has Samsung B-Die ✕
voltage 1.35V
height 35 mm
memory size 16GB

The kit uses the standard 288-pin DIMM form factor and comes as a two-module set, with each stick holding 16GB for a combined total of 32GB. The modules run at 1.35V and stand 35 mm tall, which is worth noting for cooler clearance. They do not use Samsung B-Die ICs.

Features:

Intel XMP / AMD EXPO Intel XMP 3.0, AMD EXPO
Supports ECC memory ✕
Has an integrated heatsink ✓
has RGB lighting ✕

The modules support both Intel XMP 3.0 and AMD EXPO, allowing compatible motherboards to automatically apply the rated speeds and timings. An integrated heatsink is included, while RGB lighting is absent, keeping the visual profile understated. The kit does not support ECC memory.

Benchmarks:

Final Verdict

The Crucial Pro Overclocking DDR5-6400 CL38 32GB (2x16GB) is a straightforward DDR5 kit aimed at desktop builders who want a high-capacity, high-frequency option without the complexity of manual tuning. Its dual Intel XMP 3.0 and AMD EXPO support makes it broadly compatible across modern platforms, and the 32GB configuration comfortably covers demanding workloads. The CL40 timings and absence of Samsung B-Die ICs mean it is not the first choice for enthusiasts chasing extreme overclocking headroom, but for users whose priority is reliable plug-and-play performance at 6400 MHz with a clean, no-RGB aesthetic, this kit delivers a well-rounded package.

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