Since the early stages, this game improved a lot and no tinkering is required now. It's 92 Gigs now! Mod session works on Windows only, but few custom maps are just awful due to unprofessional baking of general lights and shaders. Actual DirectX11 translated through Vulkan it gives same frame rates but better consumption with almost 10 degrees Celsius less compared to Windows and its proprietary Radeon drivers (meh!). I don't know how many ages we need to wait in order to finally see real common sense on developers side using Vulkan as native. DirectX12 sucks badly, many users still have no idea. However, the problem with Unreal 4 engines is always the excessive amount of resources when the post-processing is on mid-high or even epic settings. Just keep it low, at minimum, and your hardware will last longer in my opinion. For who play at 1080p (1200p in my case) it is useless to set any other graphic settings above the high levels (especially textures) because your eye will not catch a difference if you don't play at 4K. Suggested settings for good AMD CPU/GPU configuration

Texture: High; Shadows: High; Antialiasing: Medium; Post-processing: Low; General FX quality: Epic; View distance: Epic; Decal amount/distance: 96%; FSR ON: Balanced; OptiWand framerates: 30; OptiWand resolution scaled: 90%; OptiWand picture in picture mode: ON (just like SWAT4).

Notes: there is a particular map, badly optimized, that drastically drops framerates on any hardware (the mission with the crazy extremists inside the house in the woods). That is a developer issue and has been addressed to their attention months ago. They will fix it.