Crucial Pro Overclocking DDR5-6400 C32 2x16GB Review: Performance Through Optimization

Crucial has recently launched the Pro Overclocking DDR5-6400 C32, its latest memory kit designed to compete with the best RAM available in the retail market. Although higher data rates are accessible, many memory vendors focus on DDR5-6400 due to its optimal balance between performance and affordability. Crucial already has several DDR5-6400 memory kits in its arsenal, including a CUDIMM variant; however, these featured conservative memory timings. Recently, Crucial has done some extra binning and optimization, now bringing a DDR5-6400 C32 memory kit to the market. The new addition to the brand's Pro Overclocking series caters to enthusiasts seeking improved performance.

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Although the new memory kit retains what Crucial refers to as an origami-inspired heat spreader, the company has made subtle modifications to the design. Instead of a uniform solid white or black color, Crucial has introduced a camouflage pattern with a highly gamer-oriented aesthetic. The aluminum alloy heat spreader remains available in either black or white finishes, although Crucial employs fancier names such as "Stealth Matte Black" and "Snow Fox White," respectively.

Like other memory kits from the Pro Overclocking lineup, there is minimal marketing on the memory modules. The Micron logo remains visible; however, this time, the Crucial logo is presented as a product of CNC machining with a diamond-like finish to enhance light reflection. The Pro Overclocking memory modules have a height of 1.38 inches (35 mm), fitting into the low-profile category.

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The memory kit consists of two 16GB memory modules. Each module features a single-rank design with eight integrated circuits (ICs), arranged on a single side. This represents the first occasion that we're seeing these Micron 5QH75 D8HKZ ICs, which, according to the SPD dump, appear to be Micron's new H-die ICs. Given that the memory module is 16GB, each IC has a capacity of 2GB. Meanwhile, the 12=BL 1G1 power management IC (PMIC) indicates to us that it's from Richtek.

As with any overclocked memory kit, the memory modules default to JEDEC's specifications. In this case, it's DDR5-5600 with timings at 46-45-45-90. Both Intel XMP 3.0 and AMD EXPO support are present in Crucial's Pro Overclocking memory modules. The primary profile is configured for DDR5-6400 with timings specified as 32-40-40-102 at 1.35V. Conversely, the secondary profile is designated for DDR5-6000 with timings of 36-38-38-80 and a DRAM voltage of 1.35V. See our PC Memory 101 feature and How to Shop for RAM story for more timings and frequency considerations.

Comparison Hardware

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The Intel system features the Core Ultra 9 285K processor and the MSI MEG Z890 Unify-X motherboard with firmware version 7E20v1A60. Conversely, the AMD system utilizes the Ryzen 9 9900X processor and the MSI MPG X870E Carbon WiFi motherboard with firmware version 7E49v1A64. The Corsair iCUE Link Titan 360 RX LCD CPU liquid cooling solution efficiently sustains optimal temperature levels for both the Arrow Lake and Zen 5 processors.

The MSI GeForce RTX 4080 16GB Gaming X Trio addresses the more graphics-intensive workloads, ensuring that our gaming RAM benchmarks do not have a graphics bottleneck. TeamGroup's A440 Lite PCIe 4.0 SSD strikes a balance between performance and storage capacity, offering 2TB of high-speed storage that reaches speeds of up to 7,400 MB/s, ideal for Windows 11 24H2 installations, benchmarking software, and gaming.

Meanwhile, the Corsair RM1000x Shift ATX 3.0 power supply provides a dependable and sufficient power source for our testing systems, directly supplying the GeForce RTX 4080 with a native 16-pin (12VHPWR) power cable. Ultimately, the Streacom BC1 open-air test bench is capable of housing all of our hardware.

Intel Performance

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Crucial's latest memory kit demonstrated commendable speed on the Intel platform. It faced no significant issues securing a top position, only trailing behind the Dominator Platinum RGB DDR5-6400 C38 in application performance. Conversely, the Pro Overclocking's gaming performance was comparatively modest and ranked at the lower end of the competitive spectrum.

AMD Performance

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Memory kits do not consistently demonstrate identical performance across various platforms; therefore, testing is conducted on both Intel and AMD motherboards. The Pro Overclocking DDR5-6400 C32 memory kit did not perform notably well on the AMD platform and was generally slightly slower than the existing Pro Overclocking DDR5-6400 C38 memory kit.

Overclocking and Latency Tuning

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Our best overclocking result on the Pro Overclocking DDR5-6400 C32 was DDR5-6600, maintaining identical memory timings while increasing the DRAM voltage from 1.35V to 1.45V. The result was marginally lower than the DDR5-6400 C38, which was anticipated, given that we were able to preserve the CAS Latency (CL) of 32 clock cycles as opposed to 38 clock cycles on the latter.

Lowest Stable Timings

The factory timings for the DDR5 6400 memory kit were already approaching the stability threshold. Efforts to reduce various memory timings were unsuccessful. Additionally, increasing the voltage to 1.45V, which is 7% above the default setting, did not allow us to lower any of the memory timings.

Bottom Line

The Pro Overclocking DDR5-6400 C32 exhibited a varied array of results. In comparison to the DDR5-6400 C38 variant, Crucial refined the CL timings from 38 to 32 clock cycles; however, this adjustment was accompanied by an increase in tRAS from 84 to 102 clock cycles. The trade-off balances out the performance, which explains why the C32 version is not necessarily consistently faster than the C38 version on every platform. With DDR5 memory, all timings are important, and you should not be fixated solely on the CL timing.

Crucial markets the Pro Overclocking DDR5-6400 C32 memory kit with two distinct pricing options based on the selected color trim. The Stealth Matte Black variant is priced at $174.99, whereas the Snow Fox White variant incurs a $12 premium, resulting in a retail price of $186.99. For comparison, the Pro Overclocking DDR5-6400 C38 memory kit currently sells for $129.98. Regardless of the choice, Crucial provides a limited lifetime warranty on all Pro Overlocking memory kits.