I have a MSI WindBox DC100. unfortunately it has a very nosy stock fan - so i'd like to replace it (in a 'im going to bolt a 80mm fan on the outside of the case' kind of way) The motherboard ...

I have an old-ish motherboard with a single 4-pin PWM header and two 3-pin headers. Unfortunately, the 3-pin version of the fan I want is no longer available I'm considering just buying 3 PWM ...

The iW1700 zero-power ac/dc digital PWM controller enables low-cost, energy-efficient 120/230V-ac offline adapters and chargers requiring as much as 5W, Aspencore ... standard six-pin SOT-23 package ...