The Be Quiet Dark Power Pro P10 is an excellent 550-watt power supply. The winners from our previous round-up, the Cooler Master Silent Pro M2 520 watt, the Nexus NX-R5000 R3 and XFX Pro 550W Core are all a lot cheaper than this Be Quiet, however, some even cost half as much. This difference in price is also reflected by the included features, only the Cooler Master is modular like the Be Quiet, but significantly less efficient, more noisy and a lot less connectors. It's clearly a different segment, with the Seasonic X-Series 560W setting the example.
That Seasonic X-Series 560W was the winner in the 500-600 watt segment. If we compare it to the Be Quiet Dark Power Pro 10, then the latter has a number of advantages. These include longer cables, more connectors ( 5x PEG instead of 2), four fan connectors on the power supply itself, and better efficiency. The OC key does not offer a unique advantage over the Seasonic, as the X-Series 560W already is single-rail. The Seasonic has a lower ripple, but it's a moot point since the Be Quiet scores good enough. The former is also semi-passive, which means it can possibly run even more quiet at higher loads. The conclusion is that it's a draw between these two power supplies, so it's a matter of personal preference.
It also means that this Be Quiet Dark Power Pro 10 550W earns the Hardware.Info Gold Award. It's an excellent product, with a number of unique features.
Be Quiet Dark Power Pro 10 550W