Power and amps

[The Astroman]

Can someone explain why despite having triple 25A 12V rails, my PSU indicates the 12V rail gives 480 watts (40A) instead of 3*25*12= 900 watts (75A)?

 

[StrangleHold]

The rated amps. on each rail is just the (max) any one rail can pull without tripping the supply.

 

[linkin]

The rated amps. on each rail is just the (max) any one rail can pull without tripping the supply.

And if it trips, all it will do is cut power. nothing bad will happen

 

[StrangleHold]

And if it trips, all it will do is cut power. nothing bad will happen

You mean if it trips instead of a blown power supply. If it just trips it and causes a restart it would be about the same effect as holding the power button in for a hard restart.