the thing is that the cooler got 5 fans 1 big fan and 4 small ones i will be removing the one in the middle and will drill a square almost the size of that fan cuz its a little bit bigger and will keep the small ones as they are but all of the fans max speed is way slower than this new fan max rpm 1200 -+ (small fans) 2000-+ (big fan) the new one is more but i am not sure but it takes power directly from the wall not usb so its strong enough than them that i feel also the speed control unit is not working it shows numbers but i don't feel any difference in the air that coming from it so must be faulty some how ,the big fan is giving pushing air to the cooler and the 4 small fans are pulling but they will not be able to pull with this one cuz it way stronger than the 5 fans combineddo the same way as the original fan