I'm currently running a 7800x3d and I'm considering using 4x16GB of DDR5 RAM sticks, but there's a catch: they're not a matched set. One pair is CL36 at 6000MT/s and the other pair is CL32 at the same speed. I originally bought the first set back in 2023, but I hit some compatibility snags with my Gigabyte Gaming AX motherboard, even though those sticks were on the QVL. Since then, there have been numerous BIOS updates aimed at improving RAM compatibility. I wonder if the first set would work fine now, but I'm curious about how much this configuration could stress the CPU.
4 Answers
If you really don’t need 64GB of RAM, consider selling one set and just using two 32GB sticks instead. Most users find that 32GB is plenty for gaming and general workloads.
Remember, don’t take risks with your setup. If stability is a priority, you might want to avoid mixing RAM types. There's a ton of bad advice out there, so make sure to do your research!
Honestly, since you already have the RAM, why not just give it a shot? It could just work for your needs!
For sure! It's worth a try. You can always tweak settings if needed.
Using four DIMMs at 6000MT/s can be a bit tricky, and it might not be stable at higher speeds. If you're okay with just sticking to the standard JEDEC speeds, you should be fine. Just keep your expectations realistic about overclocking.
Yeah, I agree! If you’re looking for more flexibility, you might end up at around 5200MT/s, which is much more stable for four sticks.

Totally! I've seen too many setups struggle due to mismatched RAM.