Hey bought a corsair 750 watt professional gold bought a month ago, and on startup the fan makes a grinding noise for about 2 sec and then when powering down its like i can hear the fan slowing down but its loud. During playing League of legends the other night the fan acted up and this is when the sounds all started it was a very loud grinding noise but that hasnt happened since only when i startup and turn the pc off now, is it because I have the fan pointing down and something is getting pushed on the fan itself? the case i have is the HAF x, thanks!