Well the thing with memory is,
that there are allot of differentiates between memory kits.
Quad kits or kits are sticks that are tested working together.
Even if you buy two kits with the same timings, speeds and voltages,
it could still mean that the modules are totally different e.g. single rank dual rank,
differentials between chips used like Samsung B-die, Hynix or micron.
Mix match that, and you could also run into issues aswell.
The thing with memory is that its a pretty complicated mess nowdays.
Even two kits from the same brand and family can still have different memory chips on them.
This then depends on the product serial numbers.
Thats why for HEDT platforms like TR and X299, you get Quad kits,
with either 4 or 8 dimms.
Those are all tested to work together and are identical in terms of speeds, timings,
ranks and chips.
Thats why they are called kits.
AMD ZEN is really picky wenn it comes to memory.
If you have clearance issues due to your cooler.
I would personally advice to sell your current ram.
And just buy a quad kit with 4 sticks. like 4x 8Gb or 4x 16GB,
whatever you need for your day to day workloads.
Double check the motherboards qvl list about which kits work best with your particular board.
Ideally you want Samsung B-die memory chips, those seem to work best with Ryzen and TR in general.
Certain G.skill Trident Z and Flare X kits have those.
I believe also some sniper kits aswell, but that is something you need to do some more re-search into.
Because i dont have a memory module data base printed in my head haha.