on my two csppc's , I have changed both their fans with new 12v ones that are better...
on the 060 of one there is a large heatsink and on the other's 060 there is a low-height heatsink and on that the original 5v ppc fan...
on a tower, just have a large 80x80mm fan blowing air on the whole ppc board... it will keep it happy!
