Here is my last fresh install of BigSur But still I have some issues. First my USB2 ports are not working . Second I have some performance problems like when I type or when using mouse it reacts late ı think It could be about USB ports, And allover system work. fine but reacts a little bit late .. My system mobo Asrock B450 , cpu: Ryzen 2700, Gigabyte R580 8gb, 16gb 2133 mhz ram... and I want to change this Intel core i5 to ryzen 2700,any advice is considered Thank you