I bought 2 Noiseblocker Multiframe M12-P PWM fans from 2 different stores for my CPU cooler. Both of them made noticeable whining PWM motor noise at low RPM even inside my P182 case when connected to my P5Q Deluxe motherboard. Connecting the M12-P to a Zalman ZM-MFC2 fan controller made the same whi...

Hi, Hypernova;

How do you reverse the middle NMB fan to rotate in counter direction? I actually want to buy a Delta EFB1212LE 120x38mm Triple Blade Low Speed fan, which rotates counter-clockwise, to try this idea out. But this Delta fan is out of stock everywhere.

Thanks.