Quake low fps on good pc (SOLVED)

[ZeBear]

For some reason out of nowhere i am getting around 50fps in quake while i was getting 250 before.

CPU: i7 4790k @4700MHz
GPU: gtx 1080

I have had this problem before but it was even worse (around 30fps) and all i did was uninstall steam and reinstalled it and it worked normally without reinstalling but when i pasted my previous userdata folder back in the game broke again. Because i was tired i just left it like that for a month or so and just reopened it yesterday and it worked perfectly for some reason.
I played for a few hours and then my friend gets banned from my own server for no reason and when i quit remove the file with the ban list from the game and verified the cache the game broke again but this time even reinstalling steam fixed it only for a few minutes. This time when i reinstalled steam the game was running weirdly (main menu was running at max 60fps when before it was at 62, the game when capped at 125 ran at around 100 and when capped at 250 ran at around 180 but at both times stuttered) so i restarted my pc and then it was back to 50fps. I tried on my friends steam account and it ran better but still stuttered slightly but it would have been playable.

When i run the game there are fps drops in the main menu too and if i check the cpu usage one core is almost maxed out and the others are being used slightly but that is way too much usage just to be running the menu at 50 and when i enter the game the usage stays the same and the gpu hovers around 1-3% usage.

My theory is that the game is doing something in the background that is using up all the processing power and only allows the game a small amount of cpu to work with.

I have tried the 2 console commands that everyone recommends and they didn't help in the slightest.

I have tried a lot of other things but i can't remember all of them at the moment.

PLEASE HELP :(

[nēmō.]

Publicado originalmente por gonzo:

try disabling threaded optimization in your nvidia control panel

Thank you, you fine gentleman!

[SolivaN]

Right now in 2021 I've the same problem with my Ryzen 5 5600x and RTX 2070
In my case I've found the solution disabling the Steam Overlay.
I hope this can help to someone if the others tips don't work.

See ya!