be quiet! SYSTEM POWER 11 650W - Power Supply

be quiet! SYSTEM POWER 11 650W is a reliable ATX power supply designed for modern PCs, offering stable performance and strong protection features.

With a total rated power of 650 W and a single powerful +12V rail delivering up to 54.17 A, the SYSTEM POWER 11 is well suited for mainstream gaming rigs and productivity workstations that require consistent power delivery.

The unit supports AC input voltages from 200 to 240 V at 50 Hz with an input current of 4 A and a high power factor of 0.98. Its efficiency is rated at 89.7% and it carries an 80 PLUS Bronze certification, helping reduce wasted energy and heat under typical loads.

Cooling is handled by a 120 mm rifle-bearing fan that spins between 0 and 2100 RPM, producing a measured noise level around 30.9 dB while actively maintaining stable temperatures. The PSU includes an on/off switch and a compact ATX form factor (150 x 86 x 140 mm) that fits standard cases.

Safety and longevity are emphasized with a broad set of protections — over current, over power, over voltage, overheating, short circuit, surge & inrush, and under voltage — plus compliance with CB, CE, RoHS, TÜV mark, and UKCA standards. The MTBF is rated at 100,000 hours.

Connectivity is generous for a non-modular supply: 20+4 pin ATX motherboard connector, two 6+2 pin and one 12-pin PCIe connectors for graphics, five SATA power leads, one Molex peripheral connector, and CPU power via a 4+4 pin plus an additional 4-pin P4 connector. Hold-up time is 17.04 ms and combined rail power allocations include 120 W on +3.3V and +5V rails and the full 650 W on +12V.

Common use cases include mid-range gaming PCs with one or two graphics cards, compact workstations for content creation, and reliable office systems where energy efficiency and quiet operation matter. Packaged in a black box (weight approx. 2.4 kg) it comes with screws and cable ties included.

• Total power: 650 W, single +12V rail (54.17 A)
• 80 PLUS Bronze, 89.7% efficiency
• Comprehensive protection features and certifications
• Non-modular cabling with 5 SATA and multiple PCIe connectors
• 120 mm rifle-bearing fan, ~30.9 dB noise