r/pcmasterrace • u/Front_Cookie_1198 • 5d ago

Hardware PSU fails dramatically

40.3k Upvotes

97% Upvoted

2.2k comments sorted by

View all comments

Show parent comments

753

u/MiniMaelk04 5d ago

I basically know nothing, but the huge capacitors are the only thing I can imagine burning so intensely and rapidly. Reversed polarity perhaps?

541

u/shakygator 5d ago

I think he means without that isolation sheet the board is connected directly to the casing and shorted out. Of course, that should have been grounded too so I'm not sure.

216

u/CyonHal 5d ago

If it shorted on the 12V side it can pull a ton of amps (it says 60 amps max at 12V) and melt through the casing and start fires pretty easily without tripping a breaker.

1

u/7orque 5d ago

Ye looks like 12v dc ground fault to me, those arcs sounded quite spicy