Interesting posts. I see we have a unanimous verdict that the Bgears BG01190 b-Tarantula 650 watt power supply is not a high quality psu. Ubnfortunately, nobody bothered to explain to nielnield why. Luckily DellUser1 provided a link to a technical review.
The power supply is supposed to be a 650 watt psu. However, the total current on the +12 rail(s) is only 37 amps. That's the equivalent of an average 500 watt power supply. A high quality 650 watt psu will have a +12 volt rail(s) rated at 50 amps.
Unfortunately, the rest of the review is incomplete. There was no examination of the internal components. Testing was woefully incomplete. Energy efficiency was not verified. Overall, it was a very poor review that could mislead readers.
The bottom line is we can clearly see the data label in a photograph which tells us that the +12 volt rail which supplies power to the cpu, video card, and several other comoponents is weak. That is a definite red flag.
Corsair and Seasonic are two brands that have a reputation for high quality power supplies that consistently earn high marks in technical reviews. They are reliable, stable, and come with a 5 year warranty. Some of the newer models come with a 7 year warranty.