My setup is a 2200g on a b450 f with a 2x4 kit of ram i plan on upgrading to a 3700x and 16gb of ram. would it be a good idea to buy another kit of the 2x4 and use all 4 dimms in dual channel?
It probably won't make much difference in overall performance but if you want to eek out the last iota of performance go with 2X8GB. Otherwise, 4X4GB will probably be fine as long as you can match your existing kit.