This game uses 4-5gb of ram easy and I sit at ~10gb ram use with Firefox and my overclocking apps running in the background on Win 10 Pro.
The 2600x and 580 are pure garbage, but should be fine assuming you’re at 1080p.
There’s even some other genius here who came to the profound revalation that, wow, maybe in 2018, 8gb of ram isn’t enough to play a brand new AAA game from the infamously un-optimized and bug-riddled Electronic Artz?
Helpful tip that might reduce your microstuttering and increase you frame rate significantly
OR, if you’re playing in DX11 with FFR set to OFF, that’s your problem. This game is basically unplayable in terms of frame rate performance in DX11 with FFR off. You need to either turn FFR ON, or switch to DX12.