be quiet! System Power 11 80 PLUS Bronze PSU, ATX 3.1, PCIe 5.1 – 450 Watt, juodos spalvos

The be quiet! System Power 11 is an efficient and particularly quiet power supply for budget-conscious PC enthusiasts. With ATX 3.1 support, a modern protection concept, and stable voltage supply, it is ideal for compact gaming and office systems.

• ATX 3.1 power supply with support for PCIe 5.1 graphics cards
• Two PCIe 6+2 connectors for efficient GPU power supply
• Operation with up to 89% efficiency (80 PLUS Bronze)
• Temperature-controlled 120mm fan for quiet operation
• Safety features: OCP, OVP, UVP, SCP, OTP, OPP

Ready for modern hardware and GPUs

The System Power 11 is an ATX form factor power supply with a depth of 140 mm – perfect for powerful desktop PCs and fits into most common cases. With ATX 3.1, you get maximum efficiency and are well-equipped for upcoming hardware – optimised power consumption, faster transient response, and full compatibility with PCIe 5.1. It supports mid-range graphics cards through two PCIe 6+2 connectors and offers high stability in cross-load scenarios.

The power supply is equipped with a single-rail voltage supply and is ideally suited for high-performance hardware, as it consolidates all available power on a single 12V rail and reliably supplies high loads.

The 450-watt power supply reliably and stably powers office, multimedia systems, and small gaming PCs.

Quiet operation in a compact format

Thanks to semi-passive cooling, the fan remains off at idle and only ramps up under increased load, ensuring whisper-quiet operation. The temperature-controlled 120mm fan provides quiet airflow and efficient cooling – ideal for home office, media, and gaming PCs.

The power supply, with its optimised cooling and semi-passive operation, is ideally suited for silent and gaming PCs, as it minimises disruptive fan noise while also providing reliable performance.

Efficiency and protection at a high level

80 PLUS Bronze – Solid efficiency with up to 89% efficiency under typical load at 230V. At the same time, extensive protection circuits reliably guard against voltage spikes, short circuits, and overloads.