Hi Tanax, great to have you here!Do you have Rocket League, League of Legends and/or Cities Skylines (with or without expansion After Dark)?
Win or OSX doesn't matter, but OSX is of course preferable. And if you have any of these games, could you try out different settings and resolutions to see which gives the best settings while keeping it above acceptable performance?
Great thread!
I don't have either Rocket League or Cities Skyline, but I have LoL and as I stated in the OP:
League of Legends runs at 60 fps at 5K, very high detail (yes) - Windows 10
But beware, at 5K the UI is ridiculously small and you'd have to accelerate your mouse accordingly. So if you're gaming competitively, stay at 1440p ultra and don't worry about a thing except for the lag