@Alejandrorub Will the Corsair fans and the noctua fan mess up my pc cause of different rpm or no ?
They will not mess up your PC at all. However, they may mess with your head as you try to figure out AWCC with non-Dell fans and you may never know what rpm your fans are running. Look for a 3rd party app that reports fan rpm and not % of 'who knows what?". To reiterate, if you get the right 3-pin fans, you will always know exactly what rpm your fans are running.