Hey everyone! I'm building an AM4 system using my old DDR RAM sticks, which are both running at 3200MHz but have different latencies. I was planning to pair this setup with a Ryzen 7 5700X. I've heard mixed opinions—some say it's fine to run XMP at a lower speed or even turn it off, while others warn about potential issues with mixing RAM sticks on an AMD CPU. I'm not very tech-savvy and could really use some clarity on this. If I were to opt for an Intel CPU instead, what would be the equivalent of the Ryzen 7 5700X? I'd be okay with something slightly better too. I want to keep power consumption low if possible, and I'm planning to pair the CPU with an RX 9060 XT. Thanks! 🙂
3 Answers
It's usually not advised to mix different RAM, but it might still work fine. You could manually tune the settings for a decent performance, though that requires a bit of tinkering. As for CPU options, the Ryzen 7 5700X is generally between the Intel i5-12400F and i5-12600K/KF. It's also comparable to older models like the i7-10700K, i7-11700K, or even the i9-10900K series.
Honestly, I'd recommend against Intel for your setup. About the RAM, if you mix them, it probably won't work well together. You'll likely end up with performance limited to the slower RAM's latency. XMP settings can be tricky and might be unreliable due to the mixed sticks.
How does that actually work?
When I set everything up, will it just operate at the default speed (no XMP at 2133), or is there a risk it won’t work at all?
I’d say the i7-10700K or i7-11700K would work for you. I’ve used the i9-10900K with XMP set at 3600MHz, and it’s been stable. But if you're looking for top performance in gaming, check out the i5-14600K or i5-14700K; they handle workloads well too. Don’t forget to update your BIOS to the latest version when you get one!

How does it work if I want to tinker?
If I set everything up and turn on the PC, will it run at basic speeds without XMP (like 2133), or could it just not work at all? Can I fiddle around with it later?