I've been working on Gigabyte H55M UD2H motherboard. This system will be contain the System FAN. We all know that his FAN will be used to keep the processor temperature as cool. Now there is an problem arrives on this system FAN. This system fan has to be 4 pin connector an now it is not spinning sufficiently. When I check its specification then I realize that now It spinning at low rpm that is stays at approx 500rpm. I need the perfect solution or the alternative FAN to solve this problem. I am using a Corsair H50 cooler. Thanks for any help.