Both my Q3 and QPro at ~headset native res (~2K). Tlod/Olod moderate for my PC specs; 130/180 with msfs2020 (DX12), 150/150 with msfs2024.
I think that most mid-high end users will find that they are cpu limited. You overall cpu usage may seem low but if you drill down with cpu monitor apps you’ll find that at least one cpu thread is often hitting near its max.
There are some good 2020 guides that help show which parameters effect cpu/gpu usage. Here’s one that also includes a link to 2024;