It is but if any money saved can be put into other parts of the build that would affect performance then considering the MSI board your looking at supports up to 3466mhz memory then maybe the savings can be used for that. Although one other issue is that once you go above 3200mhz memory pricing gets noticeably higher to maybe that extra 3-5 FPS isn't worth $50 more.
I've got 2x4gb 2400mhz ram if i got a 16gb kit i couldnt refund my current ram therefore i'd have to get a 2x4gb kit of 3200mhz ram which would cost around $100, and yeah not much fps improvement, not like i need more fps anyway with a ryzen 7 2700x & gtx 1060 6gb strix.
to put it simply a long time ago in a galaxy far away my power supply failed and damaged a bunch of my components, my cpu & gpu, possibly motherboard, possibly ram.
i've replaced gpu & cpu and gotten rid of choppy, sluggish frames but my frames during games are still less fluid and a little vsync like but in other areas they are fluid and smooth, point is i'm not sure whether or not it's normal, but if it isn't and my motherboard is causing it then replacing that would be a hail merry cause there's no way for me to find out if it is, or it might be my ram
hence predicament.