Fan controller compatibility

[David Cole]

Grateful if someone can advise me whether a fan controller (this one - http://www.quietpc.com/gb-en-gbp/produc ... -mfc1-plus )
will control a 140mm fan. I am using the controller with 120mm fans but so hopeless is my knowledge that I don't know if it will work with 140mm fans. I have in mind the Lian Li PC-B10 which has both size of fans and I will want to put new quieter ones in. I know there is some issue with whether or not a fan is PWM but I don't know what it is (except that Noctua told me that their 140mm fan should work with the Zalman fan controller). But will all 140mm fans work with it?

Thanks.

[misterd]

PWM has nothing to do with the physical size of the fans. It's the 4 pin connector on the fan VS the 3 pin normal standard. It's used to automatically control speed based on temperature requirements. I will let an expert continue on from here. They are generally backwards compatible but you lose the speed control feature when doing so.

[fumino]

as long as the fan uses 3pin or 4pin fan headers, and not exclusively a molex header, that fan controller will be able to power it properly.

I know there is some issue with whether or not a fan is PWM

there is no such issue with manual fan controllers, thats strictly with automatic fan control on some motherboards.

[David Cole]

Thank you very much. Clear now.