You're going from a monolithic die CPU to a standard chiplet config. Whilst your current profile doesn't sound too demanding, I think the IMC behaviour here will be quite different.
You may have to gear slightly or tweak your primary timings a little.
This is a pretty general statement without having more information.
If you're only changing the CPU, I wouldn't worry about it. It shouldn't affect the stability of your memory but at worst it won't boot and you'll have to go into the BIOS and change your settings.
*With the exception of APUs. I believe 3800+ (even 4000) is fairly achievable on Cezanne
3666 produces a good latency with C16, and I was able to boost Infinity Fabric up past the default to 1967 (it's complicated, but it's something you can do under certain circumstances). I had to get the highest speeds I could manage, because the original build was a stopgap before GPU prices dropped.
Unless I can get the RAM to work at C14 @ 3600, it won't be much of an improvement over what I have currently.
My stability suite is a mix of OCCT, TM5, and Prime95. Takes about 3-4hrs to get through all of them. 😅
It should rember the RAMs clockspeed but watch out when taking the cpu out.
If you got the 5600g when it released the thermal paste might be hard as concrete by now. I had to rip my CPU out the socket and pry it off the cooler afterwards with a scary amount of force.
I dunno what AMD uses for thermal paste but we should be using it to construct megastructures rather than a thermal compound.
I also forgot to update my BIOS so had to put the old CPU back in again to do the upadate. So definitely check your BIOS versions CPU compatibility first. Updating the BIOS will wipe out all your configurations though
Every motherboard I've used resets the ram speed, and everything else back to default when I've swapped the CPU (or even just removed it sometimes). But if your board supports saving "profiles" those may be saved, and if you can save them to a flash drive then even better.
But honestly just take a picture on your phone of the memory timings screen.
That's a good point. I dunno if my current BIOS version would recognize the 5700X3D, so might need to check on that.
Worth noting that running a medium to heavy load on the cpu for a bit will generally loosen the thermal pate a bit
And use something like dental floss or fishing line to saw through it instead of ripping components off the CPU.
I'ma run prime95 for a bit first.
I'd definitely take the opportunity to make sure the BIOS is up to date (just to be sure you're running one that supports the newer CPU), or just default everything if you're already on the current version before pulling the 5600G and dropping the new one in. Then after you've confirmed the board recognizes the 5700X3D it's just a matter of changing your settings back and dialing in the memory timings.
I know it's tedious, and probably not strictly necessary, but I figure it's better to start off with a clean slate whenever you swap out a CPU or reconfigure your memory, just so something you didn't think about doesn't come back to bite you later on.
I usually just go through all the BIOS screens where I've made changes and take photos with my phone, then use those as cheat sheets to refer back to.