Respected Opinion, IMO
FWIW: I think that sometimes we forget...that just about (If not all) every OEM system ever purchased...comes with a PSU that none of us would go out and purchase if we were building. To say that such PSUs are "inadequate", "substandard" and such...is inaccurate since they do work in the systems they are placed in.
I have a history of using Ultra PSUs, which are Tier 4 (whatever that may mean). I've never had a problem with either of them. Does it behoove me to buy something other than Ultras? I think it depends.
I believe that OEMs and some users get by with "inferiror" PSUs because whatever it is that they do on their systems...doesn't tax the PSU installed. I'm a non-gamer and I consider gaming/overclocking to be the most intensive tasks done on a system. Tier 4 PSUs probably serve the function for users like me and do so capably enough to continue to be, at the least, good enough for OEM systems/normal usage.
2015 Tier Guide
I did more research on PSUs today than I had intended and I have to say that I would visit http://www.bequiet.com/en and llook around...if I need a replacement PSU or build a new/different system.
Edited by hamluis, 20 July 2016 - 12:30 PM.