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be quiet! : Power Zone 850w

By Andy

be quiet!

Our Product Rating:

Looks Rating
Looks rating of 5 stars

Value Rating
Looks rating of 5 stars

Build Quality Rating
Looks rating of 5 stars

Features Rating
Looks rating of 4 stars

Overall Rating:
This product has a Gold Rating at Nismotech with an overall rating of 95%


The be quiet! Power Zone is home for discerning gamer's and PC enthusiasts seeking high power, top performance and great features. Power Zone 850W hits that sweet spot with granite stability, advanced cooling features, low noise and great value.


£109.21 - at the time of review on Monday 14th October 2013
Does not include P&P

Buy this in the UK         Buy this in the US         Go to Amazon DE         Go to Amazon CA


WOW this PSU looks amazing. But it doesn't just stop at the looks, its packed full off features like the ability to add up to 3 case fans, massive 12v rail, Cool Off feature and fully modular cables.


Missing flat black cables which would have been the icing on the cake.

Tech Specs

850 Watts of continuous power output with massive 12V rail design and DC-to-DC technology make this power supply ideal for overclocking
Variable speed 135mm SilentWings® fan with airflow-optimized blades, copper core fluid dynamic bearing, and special 6-pole motor enables quiet operation
COOL*OFF feature runs fans for three minutes after system shutdown to protect your valuable components at their time of maximum heat stress
Connect up to three case fans for optimized system cooling that is thermally controlled by the PSU, quieting your whole system
Full cable management with quality sleeved cables and four PCI Express connectors supports maximum build flexibility and superior airflow in your case
80PLUS® Bronze certification for high efficiency of up to 89%. Support of Intel’s Deep Power Down C6/C7 mode
Product conception, design and quality control in Germany

Feature Details

Performance Zone

Massive 12V rail design, Active Clamp and Synchronous Rectifier (SR) technology (for 12V and 5V), DC-to-DC (for 3.3V and 5V) voltage step-down for rock-solid power stability and minimal signal noise
Up to 70A / 840W available on the +12V rail, respectively 98.8% of the total power
Designed for powerful operation even at 50° C
Certified for NVIDIA SLI and CrossfireX multi-GPU systems
ATX12V 2.4 & EPS12V 2.92 compatibility supports the latest generations of processors from Intel® and AMDTM
Ready for Intel® HaswellTM platform
Excellent voltage regulation under 2% on the 12V rail

Quiet Zone

Installed variable speed 135mm SilentWings® fan includes a wide array of electronic and mechanical optimizations for best-of-class air flow with very low noise production
unique airflow-optimized fan blade design reduces noise-generating fan turbulence
advanced fluid dynamic bearing with copper core provides greatly reduced operating noise and super-long life
special 6-pole motor reduces power consumption and vibration
SilentWings® fan reduces transmission of vibration and noise
Variable fan speed is optimally governed to strike the best balance between proper cooling and deep quiet

Cooling Zone

COOL*OFF feature runs fan for three minutes after system shutdown, protecting valuable components at their time of maximum heat stress
Connect up to three case fans for optimized system cooling that is thermally controlled by the PSU, quieting your whole system

Connection Zone

Fully modular cable management with quality sleeved cables simplifies component installation, reduces annoying clutter, maximizes build flexibility, and improves cooling due to increased airflow
System supports up to 25 connectors for massive system builds
Four PCI Express connectors supported for powerful multi-GPU configurations (NVIDIA SLI and AMD CrossFireX)
Excellent compatibility for past, current and future components
Sleeved cable lengths up to 115cm also promote cooling and are perfect for large PC cases
Individual P4 and P8 plugs support all common mainboard types
Clearly labeled plugs and clever accessories promote simple installation

Safety Zone

Top protection for components against over-currents, over- and under-voltages, short circuits, overheating and overloads
Built-in surge protection included

Green Zone

80PLUS® Bronze certification for high efficiency of up to 89%
Active Power Factor Correction with an PF of up to 0.99
Standby power drain <0.15W
Meets Energy Star 5.2 guideline
ErP 2014 Ready
Zero Load design supports Intel’s Deep Power Down C6 mode

Quality Zone

High quality 105°C-rated capacitors on AC and DC side for maximum performance, high reliability, and longer PSU life under high load
Winner of the prestigious Red Dot Design Award 2014
5-year manufacturer's warranty

Brand Links

be quiet! main website: Click here for our Website

be quiet! on Facebook: Click here for our Facebook Page

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