I has a similar problem, when you get a better more powerful PSU there is more that can go wrong with it out of the box. When I put my new PSU in it fried 3 ssd's and a cpu, so if I were you I would refund that PSU and get a new one.
If you have two microphones or a webcam your computer could have switched that to the primary microphone so trie to click the arrow up icon in the bottom right corner then right click on the audio icon then click input devices and trie to set the microphone that being used to off and use a...
I would deafinately recommend the ViewSonic VX2458 because the curved monitor allows for a more immersive gaming experience. Every since I switched to a curved monitor I can go back.
I had a similar problem, and I used anti moisture packets that you can find in pill bottles and other things. That is probably going to help the situation that your in.
Generally that was a correct statement I made I was just trying to help you, if you dont like other peoples help then don't post your problems on an online platform.