be quiet! System Power 11 650W PSU
£41.29 inc VAT
148 in stock
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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.
Slim Specs Table
| 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.
Box contents
- be quiet! System Power 11 650W PSU
- Power cable (verify UK plug)
- Mounting screws
- Cable ties
- User manual
Check before you buy
- 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
Q: Is this PSU suitable for gaming PCs?
A: Yes, the 650W capacity supports mid-range gaming systems with modern GPUs and CPUs.
Q: Does it come with a UK plug?
A: The PSU includes a power cable, but you should verify it has a UK plug before purchasing.
Q: What are the dimensions of this PSU?
A: It measures 150mm wide, 86mm deep, and 140mm high.
Q: Is the fan noisy under load?
A: No, the temperature-controlled fan operates at just 30.9 dB and adjusts speed automatically.
Q: How many SATA connectors are included?
A: The PSU provides 5 SATA power connectors for storage devices.
The Consultant’s verdict & warranty
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 standard Manufacturer Warranty.
| Cooling | |
|---|---|
| Fan diameter | 12 cm |
| Number of fans | 1 fan(s) |
| Fan speed | 0 - 2100 RPM |
| Cooling type | Active |
| Performance | |
| On/off switch | Yes |
| Power supply unit (PSU) form factor | ATX |
| 80 PLUS certification | 80 PLUS Bronze |
| Purpose | PC |
| ATX version | 3.1 |
| EPS version | 2.92 |
| Noise level | 30.9 dB |
| Mean time between failures (MTBF) | 100000 h |
| Bearing technology | Rifle |
| Design | |
| 80 PLUS certification | 80 PLUS Bronze |
| Product colour | Black |
| Fan diameter | 12 cm |
| On/off switch | Yes |
| Number of fans | 1 fan(s) |
| Fan speed | 0 - 2100 RPM |
| Cooling type | Active |
| Power | |
| Total power | 650 W |
| AC input voltage | 200 - 240 V |
| AC input frequency | 50 Hz |
| Input current | 4 A |
| Power factor | 0.98 |
| Combined power (+3.3V) | 120 W |
| Combined power (+12V) | 650 W |
| Combined power (+5V) | 120 W |
| Combined power (-12V) | 3.6 W |
| Combined power (+5Vsb) | 15 W |
| Max output current (+3.3V) | 20 A |
| Max output current (+12V1) | 54.17 A |
| Max output current (+5V) | 20 A |
| Max output current (-12V) | 0.3 A |
| Max output current (+5Vsb) | 3 A |
| Power protection features | Over current, Over power, Over voltage, Overheating, Short circuit, Surge & inrush, Under voltage |
| Hold time | 17.04 ms |
| Efficiency | 89.7% |
| Number of +12V rail(s) | 1 |
| Ports & interfaces | |
| Motherboard power connector | 20+4 pin ATX |
| Number of SATA power connectors | 5 |
| Peripheral (Molex) power connectors (4-pin) | 1 |
| PCI Express power connectors (6+2 pin) | 2 |
| CPU P4 connector (4-pin) | 1 |
| CPU power connector (4+4 pin) | Yes |
| Cabling type | Non-Modular |
| PCI Express power connectors (12-pin) | 1 |
| Technical details | |
| Shipping (inner) case width | 31.1 cm |
| Shipping (inner) case length | 55.6 cm |
| Shipping (inner) case height | 21.8 cm |
| Products per shipping (inner) case | 6 pc(s) |
| Sustainability certificates | ENERGY STAR, ErP |
| Compliance certificates | CB, CE, RoHS, TÜV mark, UKCA, WEEE |
| Certificates | |
| Waste Electrical and Electronic Equipment (WEEE) compliance | Yes |
| Compliance certificates | CB, CE, RoHS, TÜV mark, UKCA, WEEE |
| 80 PLUS certification | 80 PLUS Bronze |
| Certification | |
| Waste Electrical and Electronic Equipment (WEEE) compliance | Yes |
| Weight & dimensions | |
| Width | 150 mm |
| Depth | 86 mm |
| Height | 140 mm |
| Weight | 1.97 kg |
| Packaging data | |
| Screws included | Yes |
| Cable ties included | Yes |
| Package depth | 268 mm |
| Package width | 195 mm |
| Package height | 97 mm |
| Package type | Box |
| Package weight | 2.4 kg |
| Packaging content | |
| Screws included | Yes |
| Cable ties included | Yes |
| Logistics data | |
| Shipping (inner) case width | 31.1 cm |
| Shipping (inner) case length | 55.6 cm |
| Shipping (inner) case height | 21.8 cm |
| Products per shipping (inner) case | 6 pc(s) |
| Shipping (inner) case gross weight | 15.2 kg |
| Other features | |
| Screws included | Yes |
| Cable ties included | Yes |
| Identifiers | |
| Distributor SKUs | PSBEQ-BP011EU, 581571 |
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