I know the answer to my question is almost always yes because it can't really hurt, but I just want to make sure. I have a desktop computer that has 32 GB of DDR4-3200 RAM and a 12th gen i5. I have 2 sticks of 4 GB DDR3-1866 laying around and I still have slots 1 & 3 open on my motherboard for RAM. Should I add these, or would it not be worth it since it is just DDR3? Also if I do add it, what order should the RAM be in?