
be quiet! Power Zone 850 W Review
(4 Comments) »Introduction

We would like to thank be quiet! for supplying the review sample.

be quiet! products are not that easy to find in the US, but we believe that the company is hard at work to expand into the region since there are plenty of potential buyers there. be quiet! has already established itself in Europe, especially Germany, and they definitely are among the top choices for noise-sensitive users when it comes to both PSUs and cooling products (e.g. fans and heatsinks/coolers).
We tested the Power Zone 1000 W a while ago and were left quite satisfied by its performance, but the time has come for the second unit in command of the Power Zone line, the Power Zone 850 W, to be put to the test. Like its big brother, this one is also 80 Plus Bronze compliant while featuring a fully modular cabling design and a high-quality SilentWings fan. be quiet! even provides the option to connect up to three case fans directly to the PSU for reduced noise output and optimized system cooling, since these fans will be thermally controlled by the PSU itself. Like all Power Zone units, this one features the Cool Off function which operates the fan for three minutes after the system shuts down to cool down all sensitive PSU components, which prolongs their lifetime. This isn't the first time we see such a feature in a PSU, but we haven't seen one engage the fan for such a long time after the system shuts down. Finally, like all modern PSUs, the Power Zone 850 W supports the Deep Power Down modes that were introduced with Intel’s Haswell CPUs (C6 & C7 sleep states).
Specifications
be quiet! Power Zone 850W Features & Specs | |
---|---|
Max. DC Output | 850W (900W Peak) |
PFC | Active PFC |
Efficiency | 80 PLUS Bronze |
Modular | Yes |
Intel Haswell Ready | Yes |
Operating temperature | 0°C - 50°C |
Protections | Over Voltage Protection Under Voltage Protection Over Power Protection Over Temperature Protection Over Current Protection Short Circuit Protection |
Cooling | 135 mm Fluid Dynamic Bearing Fan (SilentWings) |
Semi-passive operation | No |
Dimensions | 150 mm (W) x 86 mm (H) x 175 mm (D) |
Weight | 2.0 kg |
Compliance | ATX12V v2.4, EPS 2.92 |
Warranty | 5 years |
Price at time of review (exc. VAT) | $159.99 |
be quiet! Power Zone 850W Power Specs | |||||||
---|---|---|---|---|---|---|---|
Rail | 3.3V | 5V | 12V | 5VSB | -12V | ||
Max. Power | 25A | 25A | 70A | 3A | 0.3A | ||
160W | 840W | 15W | 3.6W | ||||
Total Max. Power | 850W |
Cables & Connectors, Power Distribution
Modular Cables | |
---|---|
ATX connector (600mm) | 20+4 pin |
8 pin / 4+4 pin EPS12V (700mm) | 2 |
6+2 pin PCIe (550mm) | 4 |
SATA (550mm+150mm) / 4 pin Molex (+150mm+150mm) / FDD (+150mm) | 2 / 2 / 1 |
SATA (550mm+150mm+150mm+150mm) | 4 |
SATA (550mm+150mm+150mm) | 3 |
4 pin Molex (550mm+150mm+150mm+150mm) | 4 |
Fan Connectors (750mm) | 3 |
The 24-pin ATX connector is mostly equipped with 18AWG wires, though we spotted some 20AWG and very few 22AWG wires. The latter are used for voltage sense purposes, hence their smaller thickness. The EPS and PCIe connectors use thicker 16AWG gauges, while all others use standard 18AWG wires.
Since this PSU features a single +12V rail, we have nothing to comment on when it comes to its power distribution.
Packaging
The box is pretty large and be quiet!'s logo, although small, easily stands out because of the font's distinctive color. The face of a PSU's package usually holds the corresponding 80 Plus certification badge, but be quiet! chose not to parade it around since this unit is only Bronze certified, although its price puts it up against the Gold-certified competition.
On this side, we find a features description in French and Portuguese.
Here is a useful schematic of all available connectors along with their cable length.
The back of the package holds a photo of the PSU that highlights its three crucial features: The fully modular design, its Cool Off function of the fan, and the high quality SilentWings fan. You will also find the power-specifications table and a features description in two languages, English and German, here.
Near the bottom-left corner are a series of badges, including the 80 Plus Bronze badge, and a list of various awards be quiet! earned from various review sites, including TPU's Recommended award, can be found on the obverse side.
Contents
The contents of the box are nicely arranged, and the PSU comes inside a nice cloth bag.
The modular cables are tied together by three Velcro straps, and the rest of the bundle consists of an AC power cord, the user's manual, enough zip ties, and a set of fixing bolts.
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