when i power up PC i have a strange clicking sound that comes from my Fan i had one that was ruined couse of that issue (stock HAF 912+ back fan) now i bough an replacment fan (CM SickleFlow) and it also started clicking after power is turned on what is the problem dont have it with other fans only the back one? i once crosed wires on PSU and it sparked can that be a problem something with voltage or what couse its only clicking for 10-15sec after power up then it stops and fan is dead silent i dont know what is cousing it couse its a second fan replacment and same issue its anoying