be quiet! System Power 11 450W power supply unit 20+4 pin ATX ATX Black
£50.99
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- Rated 4.9/5 by customers on Trustpilot & Feefo Read reviews
Overview
- ATX 3.1 PSU with support for PCIe 5.1 GPUs and GPUs with 6+2 pin connectors
- Temperature-controlled 120mm quality fan reduces system noise
- Rock-solid stability with a strong 12V-rail
- Tight voltage regulation using DC-to-DC technology
- 2 PCIe 6-2 connectors
- Dependable operation to support powerful GPUs
- Stand-by drain of less than 0.15 watts
- 80 PLUS® Bronze efficiency (up to 89.0%)
- Attractive black flat cables
- Complete suite of top safety features
- Product conception, design and quality control in Germany
Proven Reliability, Quiet Operation
System Power 11 450W has been built with value-oriented users in mind that do not want to pass on reliability and quietness. Elaborate features such as ATX 3.1 compatibility and a temperature-controlled fan and a remarkably low stand-by-drain underline the value System Power 11 450W offers even at entry-level.
Specifications
Power
| Total power | 450 W |
|---|---|
| AC input voltage | 200 - 240 V |
| AC input frequency | 50 Hz |
| Input current | 4 A |
| Power factor | 0.98 |
| Number of +12V rail(s) | 1 |
| Combined power (+3.3V) | 110 W |
| Combined power (+12V) | 450 W |
| Combined power (+5V) | 110 W |
| Combined power (-12V) | 3.6 W |
| Combined power (+5Vsb) | 15 W |
| Max output current (+3.3V) | 20 A |
| Max output current (+12V1) | 37.5 A |
| Max output current (+5V) | 20 A |
| Max output current (-12V) | 0.3 A |
| Max output current (+5Vsb) | 3 A |
| Efficiency | 89% |
| Hold time | 16.86 ms |
| Power protection features | Over current, Over power, Over voltage, Overheating, Short circuit, Surge & inrush, Under voltage |
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 power connector (4+4 pin) | Yes |
| PCI Express connector | Yes |
| Cabling type | Non-Modular |
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Performance
| Purpose | PC |
|---|---|
| Power supply unit (PSU) form factor | ATX |
| 80 PLUS certification | 80 PLUS Bronze |
| ATX version | 3.1 |
| EPS version | 2.92 |
| Noise level | 19.1 dB |
| Bearing technology | Rifle |
| Mean time between failures (MTBF) | 100000 h |
Design
| Product colour | Black |
|---|---|
| Cooling type | Active |
| Fan diameter | 12 cm |
| Number of fans | 1 fan(s) |
| Fan speed | 0 - 1800 RPM |
| Illumination | No |
| On/off switch | Yes |
Certificates
| Waste Electrical and Electronic Equipment (WEEE) compliance | Yes |
|---|---|
| Compliance certificates | CB, CE, RoHS, TÜV mark, UKCA, WEEE |
Weight & dimensions
| Width | 150 mm |
|---|---|
| Depth | 86 mm |
| Height | 140 mm |
| Weight | 1.7 kg |
Technical details
| Sustainability certificates | ENERGY STAR, ErP |
|---|
Other features
| Screws included | Yes |
|---|---|
| Cable ties included | Yes |
Manuals & downloads
Customer reviews
Delivery & returns
Delivery
- FREE standard delivery on orders over £50, otherwise £4.95 (3–5 working days).
- Express delivery £9.99 (1–3 working days) on selected products, UK mainland.
- PlayStation and Arozzi products use a 5–7 working-day service.
- Orders are processed within 24 hours, Monday to Friday excluding bank holidays. All deliveries must be signed for.
Returns
- Changed your mind? Tell us within 14 days of receiving your item, then return it within a further 14 days, unused and in its original packaging. A minimum £9.99 collection fee applies.
- Faulty or damaged on arrival? Contact us within 48 hours of delivery.
- Custom-built PCs can only be returned if faulty. Opened headphones, earphones and AirPods can't be returned for hygiene reasons.
