It's been 3 weeks since i made my new build.Everything works fine except one thing:every time i turn off the computer the psu continues to emits sounds as if the pc was still on that go away only if i unplug the psu from the wall.Is that normal?And it makes a weird screeching noise whenever i run the atitool artifact checker.No problems in games tho.Should i send the psu back or is this normal?