in 1440p the 7800x3d should in no game be the limiting factor.
for a start, just du MSI afterburner for the GPU.
any quick tutorial for it will do the trick, but honestly, just tdownload it and make sure you get "kombustor" in the add ons with it.
thats the benchmarking tool.
then you increase the clock of the GPU by steps of 20 until its unstable or the test crashes. the take the step before it, so if at +220MHz its fine but crashes at 240, use 200.
you can do memory overclocking as well but that doesnt yield as many benefits, if you do feel free to go in increments of 100 up to +400, then 50 up to +600 and from there i would do +20 again and just stop at +1k.
most cards will get 1k and after that its just diminishing returns as VRAM speed already basically never is a reason you are bleeding FPS.