The Guru of 3D published PC Buyers Guide Summer 2018
A quote from the article:
Welcome, all to the (Late) Summer 2018 edition of Guru3D's PC Buyer's Guide. This article will show you PC builds at various price points that we - as a unit - feel happy to recommend.PC Buyers Guide Summer 2018
Since this guide was last written, the pricing of GPUs has - thankfully - seen a return to more normal levels. DDR4 memory is still outpriced and takes up far too much of a build's budget (for our liking), but you cannot have everything. As such, the general advice we would offer is to buy the fastest memory you can get your hands on. Ideally, especially for systems running AMD Ryzen CPUs, this should be in the 2933-3200 MHz range. With that said, if your budget only goes so far and getting faster memory means getting a lower end CPU or GPU (especially the latter), then, by all means, get the slower memory. A faster graphics processor will ultimately make a much bigger difference to your gaming experience than faster RAM will.