So I am trying to help a buddy out. He has a new PC(RTX 3070) and a 4K monitor(LG 27GN950-B). He wants the native 4K monitor to output 1440p because he wants the competitive advantage of better frame rate. But he can't set custom resolutions through NVIDIA Control Panel or Windows Settings. NVIDIA control panel greys out the custom option and I don't know why(he cant use DSR because he has a 4K monitor). We've tried CRU too and it won't work. So he just wants it set to 1440p and we can't figure out how to do that. Any ideas? Am I being dumb and this isn't possible for some reason?