Do computer things work on DC?
And that's why they have a PSU?
Is the PSU duty to convert AC to DC?
Or do computer PSUs have other functions apart from convert AC to DC?
typo- *apart from convertING
- 8 years agoFavorite Answer
The primary function of a computer PSU is to provide variable voltages. It converts AC to DC 5v, 12 v, GND (black wires). Motherboard connector has 12v, 5v inputs, some also have 9v inputs. Optical Disc Drive needs both 12v and 5v in molex power cable. so these voltages are converted from AC to DC of course.
Another functionality is it has a boost regulator to generate/control the wattage.
Also has a voltage stabilizing unit (in good PSUs i.e.: thermaltake toughpower).
Also has separate ampere management unit, PFC (power factor correction unit).Source(s): Self. Running a Thermaltake Toughpower Grand 1200 WATT