If you're trying to maintain higher frames on a 120/144hz screen, have you tried lowering the details purely as a diagnostic step to see if frames hold? Are you on all current drivers? Have you tried rolling back GPU drivers to see if there's a shift? etc..
Out of the options you provided before, like others have said, neither of those options seems sensible, i'd expect marginal improvements on either side.
Not familiar with the game or it's requirements, is there an expected performance level you think should be doable for your system that you're not hitting?
I get 60 to 80fps at 1440p high settings with a Ryzen 5 2600, RX 580, 32GB, 2400 RAM.
I think you have an underlying issue you need to problem solve still, not sure why this thread went off the rails and switched to discussing upgrade paths for a system that should perform better than it currently is. Work from the bottom up (grab a cheap SSD if you need to), barebones install, OS, drivers and problem game, test different driver versions, major and minor, check if upgrades for your mobo bios address any specific issues you might be seeing, etc..
Put settings on Ultra, turn on RTX and disable V-Sync and show us the results.