[SOLVED] Is the PSU faulty?

[Hot___]

I have bought 2 days ago an SH Gigabyte Superb 720W. Yesterday my PC shutdown and wanted to start again but it didn't ( fans started spinning, leds turned on) but after 3 sec it shutdown again and keept doing that until I shut it down manually. After I've waited for a few minutes I tried to start it again and it worked. Today(Now as I type) I'm running OCCT for PSU, everything on 100% for 1h and not a single problem. Could it have been something else or is just a matter of time till the problen get s back and worse?

Edit: Here are the results from OCCT after 1h of running.

https://imgur.com/dqRPBOX

View: https://imgur.com/dqRPBOX

 

[DSzymborski]

It's hard to tell; it's a decade-old PSU. Buying a used, ancient PSU, even one of quality, can have...interesting results.

 

[Juular]

I wasn't even aware that this thing exists, it's some ancient stuff from 2008 and i reckon that it wasn't good even then, return it immediately.