>>308786478
You could try overclocking if you haven't yet. Even stock performance on your setup should be close to my old setup of a Fury and an overclocked 4690k though, and I rarely had issues.
>>308787060
>There are some beat saber mods for performance too
The GC fix mod I used to need doesn't exist anymore because they finally fixed it in the game. I've been fine without any performance mods since then.
I don't use it, but Particle Overdrive should let you tweak some effects, and I think there's also an in game option to turn some of that down now too.