When a compact ATX power supply just isn’t compact enough you have to think outside the box, or use a new form factor. The SFX and TFX form factors are two of the most common small form factor power supplies aside from the standard ATX that is so common in desktops. The SFX form factor measures in at 100×125×63.5 mm compared to TFX at 146×83×64mm. SFX is short and stubby while TFX is long and thin. In that sense TFX is more server orientated when server racks tend to be long and thin. Conversely SFX is more orientated towards compact computer systems that are not so obscurely shaped. Very few power supply vendors produce SFX or TFX units for the consumer market due to the fact demand is so low. However, be quiet! being the smart company they are have seen the trend towards SFX and TFX power supplies in recent years as small form factor builds have become more fashionable.



Link: eTeknix