danchoky :
Hello,
I want to ask you what do you think would be better to pair with R5 1600? A single channel 1x8 GB ADATA 2666 XPG or dual channel 2x4GB Corsair Vengeance 2666 LPX? I want to mention that the mobo I've chosen- GB AB350M HD3 has only 2 slots of RAM and I am not planning any upgrades until next year.
It's a little strange that I can't find those RAM modules in the mainboard QVL.
If you prefer, these RAMs are in the mobo's QVL:
8GB (2 x 4GB): (If you are on a tight budget, this will be a good substitute to those 2 models you mentioned)
Kingston HyperX Fury 8GB - (HX426C15FBK2/8)
Kingston - FURY 8GB (2 x 4GB) DDR4-2666 Memory ($71.94 @ Amazon)
16GB (2 x 8GB): (Much recommended since you only have 2x DIMM slots, so, you won't need to upgrade again)
Corsair Vengeance LPX 16GB - (CMK16GX4M2A2666C16)
Corsair - Vengeance LPX 16GB (2 x 8GB) DDR4-2666 Memory ($125.88 @ OutletPC)
As for 1 stick vs 2 sticks, the dual-channel speeds (using 2 sticks) would be better/faster:
[video="https://www.youtube.com/watch?v=PsgQ9g8kuQk"][/video]
As for the memory speeds, the Ryzen CPUs tend to perform to its max. potential when using higher speed RAMs, where 3200MHz is considered the "sweet-spot". However, getting a lower speed RAM would not be the end of the world for a Ryzen system, especially when budgetary constraints and specific PC usage are factored in. Getting a 2666MHz RAM speed (or even a 2400MHz) to lower the costs would
not have a very noticeable effect in performance in basic games on basic graphics. In fact,
savings gained on skimping a faster-speed RAM can be best put to much better use on spending for a better GPU - which is more noticeable in gaming.
Some games do not benefit a lot from higher RAM speeds, while some games do manage to pull off slightly higher FPS:
[video="https://www.youtube.com/watch?v=kKMqC-qgHus"][/video]