When I first built my computer I oriented the CPU cooler incorrectly. It blows air out of the top of the case. It seems to work ok, my temperatures are really good and I have a 200mm exhaust on the top so the flow makes sense. Lately, however, I've noticed a rattle and I think my CPU fan is causing it. I feel that reorienting it would likely remedy the issue, but idk if the benefit would outweigh the risk of possibly damaging my CPU.