superballer135 :
I'd like a second opinion if someone else wants to give me their view.
Getting unmatched ram to work together is propblematical at best, impossible at worst. Even the EXACT SAME stick may not play well with the old stick, especially if purchased at a different time or vendor. Even the manufacturer won't support unmatched ram to work together. They sell matched kits of ram for a reason. If you could get just any two sticks of ram to work together, there would be no need for matched sets.
The fact that Ryzen is very picky when it comes to ram in the first place doesn't help this situation.