be quiet! System Power 11 650W PSU
£44.04 inc VAT
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About This Item
- 650 W ATX 3.1 Bronze-rated power supply for PC builds
- 12 cm temperature-controlled fan with 0-2100 RPM range for quiet operation
- Non-modular cabling with 20+4 pin ATX, 5 SATA, and 2 PCIe connectors
- Over current, over power, over voltage, overheating, short circuit, surge & inrush, under voltage protection
- Energy efficient with 89.7% efficiency and 80 PLUS Bronze certification
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be quiet! System Power 11 650W | Reliable Bronze ATX PSU
The be quiet! System Power 11 650W power supply unit 20+4 pin ATX ATX Black delivers dependable power for UK desktop builds, combining 80 PLUS Bronze efficiency with quiet operation and ATX 3.1 compatibility. Built for value-focused users who need proven reliability without compromise.
Specification Overview
| Metric | Spec |
|---|---|
| Total Power | 650 W |
| Efficiency | 89.7% (80 PLUS Bronze) |
| Cooling | 120mm rifle bearing fan |
| MTBF | 100,000 hours |
| Dimensions | 150 x 86 x 140 mm |
Proven Reliability for UK Systems
The System Power 11 650W power supply unit 20+4 pin ATX ATX Black features a rifle bearing fan that adjusts from 0-2100 RPM based on temperature, keeping noise levels at just 30.9 dB under typical loads. With ATX 3.1 and EPS 2.92 compliance, it supports modern hardware requirements while maintaining stable 12V delivery up to 650W. The 100,000-hour MTBF rating ensures long-term dependable operation for UK desktops.
Efficient Bronze Performance
Achieving 89.7% efficiency, this 80 PLUS Bronze certified unit reduces wasted energy and heat output compared to lower-rated PSUs. The single +12V rail design simplifies installation while providing clean power delivery for demanding components. Active cooling and comprehensive protection features (over current, over voltage, short circuit, etc.) safeguard your system against electrical faults.
Complete UK Power Protection
Built-in surge and inrush protection, along with over/under voltage safeguards, protect sensitive components from power fluctuations common in UK electrical systems. The 200-240V AC input range matches UK mains voltage perfectly, while the 17.04ms hold time maintains power during brief outages. All units comply with UKCA, CE, and RoHS standards for UK market safety.
Package contents
- be quiet! System Power 11 650W PSU
- Power cable (verify UK plug)
- Mounting screws
- Cable ties
- User manual
Things to check first
- Confirm your system’s total power draw is under 650W
- Verify your case has space for 150 x 86 x 140 mm PSU
- Check motherboard compatibility with 20+4 pin ATX connector
- Confirm you need non-modular cabling for your build
Frequently Asked Questions
Is this PSU suitable for gaming PCs?
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Our verdict
The be quiet! System Power 11 650W power supply unit 20+4 pin ATX ATX Black offers excellent value for UK users building reliable desktop systems. Its quiet operation, proven efficiency, and comprehensive protection make it ideal for home offices, media centres, and mainstream gaming rigs. Covered by the applicable manufacturer warranty.
| Weight | 2.6 kg |
|---|
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