"Considering what Intel charges for its Core i5-7600K, we'd certainly like Ryzen 5 1600X a lot more for gaming if it debuted at a lower price. Much of the Ryzen tapestry is woven using value as its thread. But it's hard to keep that story together when Ryzen 5 1600X sells for $249 and Core i5-7600K goes for $240. With that said, professionals on a budget are far more likely to jump on a potent six-core chip like the 1600X when it's able to beat the $450 Core i7-6800K."
http://www.tomshardware.co.uk/amd-ryzen-5-1600x-cpu-review,review-33858-11.html?_ga=1.100362014.1447811569.1490454177
last paragraph
1600 comes with a cooler capable of the overclocking to 4GHz unlike the 1600x, which does not come with a cooler.
Problem solved overclock the Ryzen 5 1600 to 4GHz@$219 price point!
ASRock X370 Taichi@~$200 has had consistently good results with CPU overclock, and single rank memory compatibility@3200MHz. Also, good performance enhancements from motherboard updates. It's also, a little hard to find!
G.SKILL Flare X Series 16GB (2 x 8GB) 288-Pin DDR4 SDRAM DDR4 3200@$186 Seems to be the goto choice of a lot of popular YouTube bench testers.
https://www.newegg.com/Product/Product.aspx?Item=N82E16820232530
G.SKILL 16GB (2 x 8GB) Ripjaws V Series DDR4 PC4-25600 3200MHz@$127
https://www.amazon.com/G-SKILL-Ripjaws-PC4-25600-3200MHz-F4-3200C16D-16GVKB/dp/B015FXXBW0/ref=as_li_ss_tl?ie=UTF8&linkCode=sl1&tag=legirevi03-20&linkId=d6043fdad09d0b5ee2aaa5cbf1078df7
Here is a review for RAM usable on Ryzen.
http://www.legitreviews.com/ddr4-memory-scaling-amd-am4-platform-best-memory-kit-amd-ryzen-cpus_192259/6
Update 03-14-2017: AMD said that they have internally observed good results from 2933, 3200, and 3500 MT/s rates with 16GB kits based on Samsung “B-die” memory chips. Potential kits include:
Geil EVO X – GEX416GB3200C16DC [16-16-16-36 @ 1.35v]
G.Skill Trident Z RGB Series- F4-3200C16D-16GTZR [16-18-18-36 @ 1.35v] ($189.99 shipped)
Corsair CMK16GX4M2B3200C16 VERSION 5.39 [16-18-18-36 @ 1.35v] ($129.99 shipped)