Measuring 16.5cm long, the Zalman ZM750-HP will fit pretty much any mid-tower, full size or even many HTPC cases that are available. Because of the short length of this unit, I really don't foresee any clearance issues with top exhaust fans on PC cases. If you have an especially small case, it would still be a good idea to measure before you go and purchase this PSU. . .
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