u/Hagenspringtrap

A while ago I finished my first PC, it runs great the only issue that I've had is that I've noticed my ram usage is starting to top out. So I was planning on just buying and installing some more sticks. Buying two more of the ones I currently have is only $250 (for ddr5 I consider myself lucky) but upgrading and just replacing the old sticks, while it would cost my left nut, would be affordable after a little while of saving.

So what should I do, upgrade and replace or just add on?