Much like all models we tested from Listan; throughout our tests we were only able to measure really tiny fluctuations, with the PSU not being bothered at all. You know, there's a very simple trick to monitor if your PSU is having a hard time dealing with the load. The cooling fan is monitoring heat in the PSU, it'll spin faster when temperature (and thus load) builds. It just didn't happen here though.

There's really nothing negative to say here. This is a great product.

Granted though, this new model also comes with a higher pricetag than I expected. At roughly 230 USD/EUR this 850 Watt model is not the cheapest PSU available, and although the 700 Watt model is merely 150 USD/EUR that additional 80 bucks might be worth your investment. Everything is going dual and quad these days and trust me when I say that you do not want the PSU to be the limiting factor.

For that money you receive a good quality PSU with modular sleeved cables, high performance output and a very safe and protected environment wrapped up in a very silent package. It's an easy to use and connect (modular) power supply so I do not see any real negatives here.

Please do not hesitate on buying this PSU as everything about it is fantastic, right up-to the detailed and photo rich manual. Another great thing is that you receive a three year warranty also. Cliché as it is but it means the manufacturer believes in this product just as much as I do, it's just really good.

Many thanks to Dorothee for making this review possible.

Product: BeQuiet Dark Power PRO 850 Watt PSU
Manufacturer: Listan
Product ID: BQT P6 PRO-850W
Price: 230 USD/EUR
Info: website