Proven Reliability and Good Efficiency

be quiet! System Power 9 400W offers renowned be quiet! reliability and quietness for price-conscious PC builders.
 
Rock-solid stability with two strong 12V-rails
DC-to-DC technology for tight voltage regulation
Multi-GPU support with two PCIe connectors
Temperature-controlled 120mm fan reduces system noise
Stand-by drain of less than 0.15 watts
80PLUS® Bronze efficiency (up to 89%)
Attractive black sleeved cables
Complete suite of top safety features
Meets latest Intel® C6/C7, ErP and Energy Star 6.1 guidelines
3-year manufacturer’s warranty
Product conception, design and quality control in Germany



Very Quiet Operation 
 
Attained by using a high-quality fan
System Power 9 400W 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+ Bronze Certification
 
High operating efficiency
The 80PLUS® 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%.