Comparison of 6400MT/S CL32 and 6000MT/S CL30 models
Comparison of 6400MT/S CL32 and 6000MT/S CL30 models
The 6400 CL32 should run slightly quicker if other settings stay intact. It’s probably only a few percent faster at most, but real gains are usually around 1-3%. Without a frame counter, the improvement won’t be obvious. If you need consistent performance, opt for the 6000 kit. You might still underclock the RAM and adjust timings back to DDR5-6000 CL30, so if cost matters, you can stick with it while keeping EXPO flexible.
Very little is available, but CL30 and 6000 come closer to the controller ratio as @YoungBlade mentioned. The concern about speeds as low as 6400Mhz isn't too big. In short, either setup could be adjusted to run faster if you're comfortable working with BIOS settings. Plus, you might opt for a more affordable choice and learn how to tweak RAM timings yourself.
1.) 6400 MT/s might need more than just turning on EXPO; it could require some manual adjustments.
2.) Even after enabling EXPO, it won’t operate perfectly in a 1:1 ratio and will likely underperform compared to 6000MT/s CL30 unless corrected manually.
3.) If the IMC quality is poor, you might not even reach 6400MT/s successfully.
The EXPO spec actually refers to DDR5-6000 with a CL30-36-36 architecture at 1.4V, which explains the discrepancy.
Why purchase 6400 when you can get 6000? You can opt for 6000 and simply upgrade it to 6400 later. It depends on whether you're comfortable with manual adjustments or not. If you aim for 6400, be ready that it's not just a simple plug-and-enable setup. To be honest, I'm assuming you're interested in... but let's address your main point. You might only need about 2% adjustment. The original timing settings are less critical, and the main advantage will come from the marginally increased bandwidth. If you don't tune it to a 1:1 ratio, performance with EXPO at 6400 versus 6000 could actually decline.
The alternative EXPO profile is DDR5-6400 CL32-39-39 at 1.4V, but it may not be compatible with your setup.
I updated my previous comment... I’m not guaranteeing it will succeed. It depends on chance due to the performance of the integrated memory controller.
We're suggesting it could succeed or it might not. The outcome depends on the Silicon Lottery for whether your CPU IMC supports that frequency at a 1:1 ratio. In the early days of AM5, chances were slim. Recent BIOS and Agesa updates have improved the likelihood, though it remains uncertain. My estimate is roughly a 60% chance now—better than nothing but not something to rely on. If it fails to POST, you can revert to the alternative profile.