be quiet! System Power 9 | 400W CM

SKU
BN300
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400 W, ATX 2.51, 200-240 VAC, 6 A, 120mm fan
  • Rock-solid stability with two strong 12V-rails
  • Equipped with DC-to-DC technology for tight voltage regulation
  • Two PCIe connectors for multi-GPU system configurations
  • Temperature-controlled 120mm fan reduces system noise
  • Low stand-by drain of less than 0.15 watts
  • 80 PLUS® Bronze efficiency of up to 89%
  • Semi-modular, high-quality sleeved and flat cables
  • All-in-one cable with S-ATA, HDD and FDD connectors
  • 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
More Information
Purpose PC
Total power 400 W
Power supply unit (PSU) form factor ATX
SKU BN300
EAN 4260052187210
Manufacturer be quiet!
Availability In Stock
PDF URLs View PDF

VERY QUIET OPERATION

System Power 9 400W CM is equipped with a temperature-controlled 120mm fan. It provides you with the low noise operation that be quiet! is famous for, built into an entry-level system.

80 PLUS BRONZE CERTIFICATION

The 80 PLUS Bronze certification is convincing evidence of this PSU’s efficient and power saving operation. It is a remarkable achievement for this class of PSU, realizing an efficiency rating of up to 89%.

HIGH PERFORMANCE FOR YOUR SYSTEM

System Power 9 400W CM provides stable and dependable power for CPU and GPU. It is equipped with two independent 12V-rails and supports several graphics cards with two PCI express connectors for multi-GPU systems.

INNOVATIVE DC-TO-DC CONVERSION

The PSU is equipped with DC-to-DC conversion for tight voltage regulation, even under heavy cross-loading conditions. This ensures reliable operation and makes it ready for the next generation of processors and graphics cards.

SEMI-MODULAR CABLE MANAGEMENT

System Power 9 400W CM comes with full high-quality black sleeved cables that add a touch of class to any PC system. Thanks to the semi-modular cable management, cables that serve no purpose in the system are left out.

COMPREHENSIVE PROTECTION

Top component protection with a full suite of safety functions, including OCP, OVP, OPP, OTP UVP and SCP, which provide the ultimate in secure operation.

Proven Reliability and Good Efficiency

Specially designed by be quiet! with the price-conscious PC builder in mind: System Power 9 400W CM offers renowned be quiet! performance and quietness and makes it possible to build cost-effective and reliable systems.
Cooling
Fan diameter12 cm
Number of fans1 fan(s)
Cooling typeActive
Design
80 PLUS certification80 PLUS Bronze
CertificationCE, CB, TÜV, RCM, CU
Product colourBlack
Fan diameter12 cm
Number of fans1 fan(s)
Cooling typeActive
Power
Total power400 W
AC input voltage200 - 240 V
AC input frequency50 Hz
Input current4 A
Power factor0.95
Power Factor Correction (PFC) typeActive
Combined power (+3.3V)103 W
Combined power (+12V)384 W
Combined power (+5V)103 W
Combined power (-12V)3.6 W
Combined power (+5Vsb)15 W
Max output current (+3.3V)24 A
Max output current (+12V1)22 A
Max output current (+12V2)18 A
Max output current (+5V)15 A
Max output current (-12V)0.3 A
Max output current (+5Vsb)3 A
Power protection featuresOver current, Over power, Over voltage, Overheating, Short circuit, Under voltage
Hold time17 ms
Efficiency89%
Ports & interfaces
Motherboard power cable length45 cm
SATA power cable length550,670 mm
PCI Express power cable length50 cm
CPU power cable length60 cm
Motherboard power connector20+4 pin ATX
Number of SATA power connectors5
Number of PATA power connectors2
PCI Express power connectors (6+2 pin)2
CPU power connector (4+4 pin)Yes
Floppy drive power connector1
Cabling typeSemi-Modular
Performance
Power supply unit (PSU) form factorATX
Noise level (quiet mode, 50%)9.7 dB
Noise level (silent mode, <30%)9.3 dB
Noise level (full-load mode, 100%)15 dB
80 PLUS certification80 PLUS Bronze
PurposePC
ATX version2.51
CertificationCE, CB, TÜV, RCM, CU
Bearing technologySleeve
Compatible productsIntel C6/C7
Harmonized System (HS) code84733020
Packaging content
Cables includedPCIe, SATA
Screws includedYes
ManualYes
Weight & dimensions
Width150 mm
Depth140 mm
Height86 mm
Weight1.49 kg
Packaging data
Cables includedPCIe, SATA
Screws includedYes
Package depth268 mm
Package width97 mm
Package height195 mm
Package typeBox
Package weight2.11 kg
ManualYes
Technical details
Sustainability certificatesENERGY STAR
Compliance certificatesRoHS
Certificates
80 PLUS certification80 PLUS Bronze
CertificationCE, CB, TÜV, RCM, CU
Logistics data
Master (outer) case width311 mm
Master (outer) case length215 mm
Master (outer) case height556 mm
Products per master (outer) case6 pc(s)
Master (outer) case gross weight13.4 kg
Harmonized System (HS) code84733020
Other features
Screws includedYes
Noise level (quiet mode, 50%)9.7 dB
Noise level (silent mode, <30%)9.3 dB
Noise level (full-load mode, 100%)15 dB
ManualYes
Harmonized System (HS) code84733020

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80 Plus Bronze Certified

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Single +12V Rail

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Manufacturer
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