I have a 9700k at 5ghz and use a 3060 12gb. I don’t have a 1440p monitor though, I only have 1080p TV for main display and a smaller 1400x900 monitor for gauges, but I do use DSR at 1440p on my main display,
I still get up to 70fps in the TBM. I keep vsync on though and easily hit 60fps with the 2 displays. Dropping down to 40’s in built up areas. This is with dx12 and the latest beta version of the ms store sim.