Fps cap problem.

Hey peeps!
I'm just wondering if I can fix the fps cap on my wow client somehow? It's always stuck at around 30 fps, and there's no difference on low or high settings, it's always on 30 or around 30. It's not vertical sync either it's unchecked. I've never had this problem before playing on the wotlk client until now so I dont know what the problem is.

Hope I can get assistance regarding my issue.
Thank you in advance.

Does it happen in other games aswell?
Do u use any recording software with fps cap function like Bandicam?

Check your driver settings. I know some configs are good for locking games at 30fps while they aren't active and then fail to detect it being active again.