Article number: BN612



Powerful Performance, Outstanding Features, Great Value

Power Zone 850W provides the winning combination of superior performance, rock-solid stability, and advanced cooling.

Offering a fully modular cable management, top safety features, deep standby compliance and Intel C6/C7 readiness, Power Zone is of fantastic value. It is designed for powerful operation even at 50° C and is ideal for overclocking thanks to a massive 12V rail.

Whether you are assembling a high-power PC or multi-GPU gaming system, you are certain to benefit from the outstanding features. Power Zone 850W delivers a best-in-class blend of performance and quality for a reasonable price.

  • 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

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
  • 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 6.0 guideline
  • ErP 2014 Ready
  • Zero Load design supports Intel’s Deep Power Down C6/C7 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

Support Zone

  • Quick support is available via our international hotline, Mondays to Fridays from 0900 to 1730 German local time:
    +49 (0) 40-736 76 86 - 98 (from abroad)
All models at a glance:


General data

Continuous power (W) 850
Peak power (W) 900
Form factor ATX 12V Version 2.4
Form factor EPS 12V Version 2.92
Modular cable management
Topology Active Clamp + SR, DC/DC
Wire-free design (DC-side) -
Voltage (Vac) 100 - 240
Frequency (Hz) 50 - 60
Input current (A) 10 / 5
PFC active
Power factor at 100% load >0.99
Compliant to Intel C6/C7
Power consumption in standby (W) <0.15
Average life time (h / 25°C) 100.000
Operating temperature up to (°C) 50


open all / close all


12V rails (multi-rail operation) -
12V single rail operation
Overclocking key -
+3.3V (A) 25
+5V (A) 25
+12V1 (A) 70
+12V2 (A) -
+12V3 (A) -
+12V4 (A) -
+12V5 (A) -
+12V6 (A) -
-12V (A) 0.3
+5Vsb (A) 3
Max. combined power 12V (W) 840
Max. combined power 3.3V + 5V (W) 160
Hold-up time (ms @ 100%) 22

Fan / Cooling technology

Fan type be quiet! SilentWings
Motor technology 6-pole fan motor
Bearing technology FDB
Fan size (mm) 135
Max. fan speed (rpm), temperature-dependent 2,900
Temperature control for case fans
dB(A) at 20% load 15.5
dB(A) at 50% load 17.5
dB(A) at 100% load 35.9


OCP (over current protection)
OVP (over voltage protection)
UVP (under voltage protection)
SCP (short circuit protection)
OTP (over temperature protection)
OPP (over power protection)

Safety certification

Nemko (N) -
Semko (S)
Fimko (FI) -
Demko (D) -
cRUus -
RCM (Australia)
CU (Russia) -

Eco / Efficiency

80PLUS certification Bronze
Efficiency (%) at 230V, 20% load -
Efficiency (%) at 230V, 50% load -
Efficiency (%) at 230V, 100% load -

Environmental directives


Cable management / Connectors

Multi-GPU ready
Modular cable management
Fully modular
Sleeved cables
Flat cables -
Cable length to mainboard (cm) 60
Cable length to first connector (cm) 55
Maximum cable length (cm) 115
All-in-one cable (SATA/PATA/FDD)
No. of cables 9 + 3 fan
ATX-Motherboard (20+4-pin) 1
P8 (CPU) 1
P4+4 (CPU) 1
P4 (CPU) -
PCI-E 6-pin (GPU) -
PCI-E 6+2-pin (GPU) 4
PATA 4-pin 6
SATA 15-pin (HDD, Drives) 9
FDD (Floppy) 1
External fan connectors 3


Dimensions without cable (L x W x D), (mm) 175 x 150 x 86
Weight (kg) 2.13
Color black


Thumb screws -
Cable ties
Velcro cable ties
Box/Bag for PSU/Cables -
User manual languages DE, EN, FR, PL, ES
OCK slot bracket with switch / OCK jumper -
SFX-to-ATX adapter bracket -


Warranty (Years) 5
Express replacement service in first year DE, FR
International hotline / free of charge ✓ / DE, FR

Logistics data, RRP

Range Power Zone
Article number BN612
EAN code 4260052183564
Dimensions, package (L x W x H), (mm) 328 x 248 x 102
Gross weight, package (kg) 2.62
Pieces per packaging unit 6
Dimensions, shipping box (L x W x H), (mm) 661 x 282 x 358
Gross weight, shipping box (kg) 17.0
RRP (€) 143.00

Article number: BN612



Compatible accessories

Upgrade Check

You are already using a be quiet! power supply and want to upgrade your system with a new POWER ZONE | 850W ? Check here which cables are compatible and don't need to be replaced.

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