Crucial Pro DDR5-6400 Overclocking Memory 2x32GB CL40 vs G.Skill Flare X5 DDR5-5600 2x32GB
Crucial Pro DDR5-6400 Overclocking Memory 2x32GB CL40 has the lower true latency of the two at 12.50 ns, against 12.86 ns for G.Skill Flare X5 DDR5-5600 2x32GB. On top of the latency, Crucial Pro DDR5-6400 Overclocking Memory 2x32GB CL40 carries the lower tracked price, so both measured axes point the same way.
| Specification | CrucialPro DDR5-6400 Overclocking Memory 2x32GB CL40 | G.SkillFlare X5 DDR5-5600 2x32GB |
|---|---|---|
| Capacity (GB) | 64 | 64 |
| Speed (MT/s) | 6400better | 5600 |
| 40 | 36 | |
| True latency (ns) | 12.50better | 12.86 |
| Current best price | 840,03 €betterat Amazon.fr · captured 2026-09-09 | 1 170,00 €at Amazon.fr · captured 2026-09-13 |
| Price per GB | 13,13 €better | 18,28 € |
Crucial Pro DDR5-6400 Overclocking Memory 2x32GB CL40 vs G.Skill Flare X5 DDR5-5600 2x32GB in detail
True latency
Crucial Pro DDR5-6400 Overclocking Memory 2x32GB CL40 is the lower-latency kit at 12.50 ns, against 12.86 ns for G.Skill Flare X5 DDR5-5600 2x32GB — a difference of 0.36 ns. That figure is what reconciles the two spec sheets: CAS latency counts clock cycles, so it only means something next to the clock it counts. Crucial Pro DDR5-6400 Overclocking Memory 2x32GB CL40 runs 6400 MT/s at CL40; G.Skill Flare X5 DDR5-5600 2x32GB runs 5600 MT/s at CL36.
Transfer rate
Crucial Pro DDR5-6400 Overclocking Memory 2x32GB CL40 is rated 6400 MT/s against 5600 MT/s for G.Skill Flare X5 DDR5-5600 2x32GB — 51200 MB/s per module, against 44800 MB/s. That is peak transfer rate, not access time: reaching a higher clock costs more cycles on each access, which is why the CAS numbers differ too, and why the true latency above is the figure that compares directly.
Price and tracked history
Crucial Pro DDR5-6400 Overclocking Memory 2x32GB CL40 is tracked at 840,03 € — 13,13 € per gigabyte — and G.Skill Flare X5 DDR5-5600 2x32GB at 1 170,00 €, or 18,28 €. Both are 64GB kits, so the totals compare directly: Crucial Pro DDR5-6400 Overclocking Memory 2x32GB CL40 is 329,97 € less than G.Skill Flare X5 DDR5-5600 2x32GB. At 1 170,00 €, G.Skill Flare X5 DDR5-5600 2x32GB is running 6% below its own 90-day median.
Kit layout
Crucial Pro DDR5-6400 Overclocking Memory 2x32GB CL40 ships as 2 × 32GB and G.Skill Flare X5 DDR5-5600 2x32GB ships as 2 × 32GB — the same number of sticks either way, so both populate a board's slots identically.
Lighting and timings
On the lighting question: Crucial Pro DDR5-6400 Overclocking Memory 2x32GB CL40 does not have RGB lighting, and G.Skill Flare X5 DDR5-5600 2x32GB does not have RGB lighting. On the full timing tuple, the numbers that follow CAS: Crucial Pro DDR5-6400 Overclocking Memory 2x32GB CL40 runs 32-40-40-103, and G.Skill Flare X5 DDR5-5600 2x32GB does not publish one.
Which to buy
Crucial Pro DDR5-6400 Overclocking Memory 2x32GB CL40 leads G.Skill Flare X5 DDR5-5600 2x32GB on both of the axes this page measures: the lower true latency, 12.50 ns against 12.86 ns, and the lower price of the two at what this site has tracked.
Common questions about this pair
- Is Crucial Pro DDR5-6400 Overclocking Memory 2x32GB CL40 faster than G.Skill Flare X5 DDR5-5600 2x32GB?
- Crucial Pro DDR5-6400 Overclocking Memory 2x32GB CL40 is, on true latency: 12.50 ns against 12.86 ns. Crucial Pro DDR5-6400 Overclocking Memory 2x32GB CL40 runs 6400 MT/s at CL40 and G.Skill Flare X5 DDR5-5600 2x32GB runs 5600 MT/s at CL36; the CAS numbers alone do not settle it, because they count clock cycles rather than time.
- Which one costs less?
- Crucial Pro DDR5-6400 Overclocking Memory 2x32GB CL40, at 840,03 € against 1 170,00 € — 329,97 € apart at the same 64GB.
- Which of these two should I buy?
- Crucial Pro DDR5-6400 Overclocking Memory 2x32GB CL40 leads G.Skill Flare X5 DDR5-5600 2x32GB on both of the axes this page measures: the lower true latency, 12.50 ns against 12.86 ns, and the lower price of the two at what this site has tracked.