Comparison of 6400MHz CL32 and CL40 performance.
Comparison of 6400MHz CL32 and CL40 performance.
It varies based on your CPU model and intended use. For gaming, consider the specific titles, their settings, and your GPU. RAM changes usually only impact performance when your system is CPU constrained. In demanding visual games with high settings, RAM speed might have a slight effect, but the change will be minimal—around 10-15%. If the cost difference is significant, opting for the DDR5-6400 CL32 kit could provide a small advantage in CPU-limited scenarios. However, if the price gap is large, it may not justify the upgrade.
Considering your R9 7900X and RX7800XT, you're still choosing a motherboard due to compatibility concerns.
I wasn't aware of that until I discovered the system might become unstable without testing the RAM. I think I'll need to pick a different type of RAM and just hope it works, which isn't ideal.
I tried Corsair and ended up with 2x32GB, but it functioned properly. Using the bigger capacity version they offer for benchmarks helped too. In the UK, that was the only memory option I could find without expensive imports. I’d pick a 7800X3D if I were gaming with a 6000MT CL30, rather than an X3D without faster RAM. The 3D V-CACHE should more than compensate for any memory differences.