Halo 2 anniversary fps problems

Hi. I have been play halo 2 on pc for a while now and i am seeing wired drops with my fps. It does not seem to matter wether i am walking or if war is been waged my fps drops to 53 to 50. My fov is default my fps cap is 60 and my graphic options are original. My pc build is rx 580 gpu and Ryzen 5 2600 cpu. I need help to fix this.

I will now wait for help