Silver Stone 550W SST-ET550-B ATX Power Supply Disassembly

The fan was making a strange noise, so I disassembled it while replacing it.
PC power supplies are easy to disassemble, but it's quite scary because you often get a strong electric shock if you touch them.
I got a strong electric shock when I replaced a capacitor before. It's especially scary when touching around the board patterns.

The primary side capacitors are Nippon Chemi-Con, but the secondary side uses Chinese-made capacitors.
There are also some capacitors of unknown brand, I wonder where they're from?

A knowledgeable person once said that if good capacitors are used on the primary side, it honestly doesn't make much difference even if good capacitors aren't specifically used on the secondary side. I wonder if that's true. I heard that a long time ago, but honestly, power supplies break when they break, and there isn't much difference between expensive and cheap ones. However, these days I'm sad that the super cheap, generic power supplies of old are gone.