BeQuiet SYSTEM POWER U9 700W Bronze BN686


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SKU: TT-PSU-0004 Categories: ,


Proven Reliability and Good Efficiency

Specially designed by be quiet! with the price-concious PC builder in mind: System Power U9 700W offers renowned be quiet! performance and quietness and makes it possible for you to build cost-effective and reliable systems.

  • Rock-solid stability with two strong 12V-rails
  • Equipped with DC-to-DC technology for tight voltage regulation
  • Four PCIe connectors for support of powerful GPUs
  • Temperature-controlled 120mm fan reduces system noise
  • Low stand-by drain of less than 0.1 watts
  • 80 PLUS® Bronze efficiency of up to 89%
  • High-grade black cables
  • Complete suite of top safety features
  • Meets latest Intel® C6/C7, ErP and Energy Star 6.1 guidelines
  • Supports latest Intel® and AMD™ processors
  • Product conception, design and quality control in Germany


General data

Model System Power U9 700W
Continuous power (W) 700
Peak power (W)
Form factor ATX 12V Version 2.4
Form factor EPS 12V Version 2.92
Modular cable management
Topology DC/DC
Wire-free design (DC-side)
Voltage (Vac) 100 – 240
Frequency (Hz) 50 – 60
Input current (A) 12 / 6
PFC active
Power factor at 100% load >0.95
Compliant to Intel C6/C7
Power consumption in standby (W) <0.1
Average life time (h / 25°C) 100,000
Operating temperature up to (°C) 40


12V rails (multi-rail operation) 2
12V single rail operation
Overclocking key
+3.3V (A) 24
+5V (A) 18
+12V1 (A) 33
+12V2 (A) 25
+12V3 (A)
+12V4 (A)
+12V5 (A)
+12V6 (A)
-12V (A) 0.3
+5Vsb (A) 3
Max. combined power 12V (W) 672
Max. combined power 3.3V + 5V (W) 130
Hold-up time at 100% load (ms) 17 (@75% load)
Power good signal 100 – 500ms

Fan / Cooling technology

Fan type High quality fan
Motor technology 4-pole fan motor
Bearing technology Sleeve
Fan size (mm) 120
Max. fan speed (rpm), temperature-dependent 2100
Temperature control for case fans
dB(A) at 20% load 13.28
dB(A) at 50% load 14
dB(A) at 100% load 31.2


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

RCM (Australia)
CU (Russia)

Eco / Efficiency

80 PLUS certification Bronze
Efficiency (%) at 230V, 20% load 88
Efficiency (%) at 230V, 50% load 89
Efficiency (%) at 230V, 100% load 86

Environmental directives


Cables / Connectors

Nvidia<sup>®</sup> SLI (RTX 3090) ready
Cable management Fixed
Sleeved cables Sleeved cables
Flat cables P4+4 / PCIe / drives
Cable length to mainboard (cm) 55
Cable length to first connector (cm) 35
Maximum cable length (cm) 91
All-in-one cable (SATA/PATA/FDD)
No. of cables 6
ATX-Motherboard (20+4-pin) 1
P8 (CPU)
P4+4 (CPU) 1
P4 (CPU)
PCI-E 6-pin (GPU)
PCI-E 6+2-pin (GPU) 4
FDD (Floppy)
External fan connectors


Dimensions without cable (L x W x D), (mm) 140 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 CN, DE, EN, FR, JP, TW
OCK slot bracket with switch / OCK jumper
SFX-to-ATX adapter bracket

Logistics data, RRP

Article number BN289
EAN code 4260052186237
Dimensions, package (L x W x H), (mm) 268 x 97 x 195
Gross weight, package (kg) 2.45
Pieces per packaging unit 6
Dimensions, shipping box (L x W x H), (mm) 215 x 311 x 556
Gross weight, shipping box (kg) 14.7

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BeQuiet SYSTEM POWER U9 700W Bronze BN686