The new Kingwin Power Force 850 W proved that it can deliver its full power at high ambient temperatures with steady DC outputs and good efficiency, especially if we take into account its official 80 Plus Bronze rating. Its provided five-year warranty period will please many users, since they won't have to worry about their PSU unit for a very long time. I only spotted two main problems with this PSU, but they are, unfortunately, pretty significant. Both of them have to do with noise. Its first problem is the registered noise or ripple on the unit's +12V DC output; it is very close to the ATX spec limit. The other issue is the noise output of its cooling fan because it is already fairly audible at lower loads, which would, most likely, annoy users with a sensitive pair of ears. Personally, I don't mind its high acoustical noise, although most users do, but I am, on the other hand, very picky when it comes to ripple. Although the PF-850 stayed below the ATX limit of 120 mV at +12V, I find the aforementioned limit to be very high since most modern, well-performing PSUs register below 50 mV ripple on this rail, even under severe conditions. The PF-850 would earn a much higher rating and, possibly, a recommendation if it managed to register at least half the ripple I measured at +12V, but this was, unfortunately, not the case.

The Kingwin Power Force 850 W has several good attributes; its voltage regulation, efficiency, and the long warranty period are the most important of them. It is a real shame that the ripple suppression on its +12V rail spoils the PF-850's overall impression, at least for me. It, nevertheless, still manages a decent spot on our performance-per-dollar chart.