If you also posted this to the steam forums by a similar name you mentioned having 1x8 gb stick of RAM in single channel. I can tell you that in general single channel vs dual channel e.g. 2x4 gb vs 1x8gb of RAM has a performance impact of roughly 30% in general, but it can be as bad as 50% as you see here in this example in Battlefield V with an 8600k even when you’re using only 6GB of the RAM.