be quiet! 650W ATX 3.1 PSU, PCIe 5.1 compatible
£46.49 inc VAT
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About This Item
- ATX 3.1 PSU with PCIe 5.1 compatibility for next-gen GPUs
- 650W continuous power with 80 PLUS Bronze efficiency up to 90.0%
- 120mm be quiet! silent fan with rifle bearing for quiet operation
- Single +12V rail design with up to one PCIe 5.1 12V-2×6 600W connector
- 5-year manufacturer warranty with German design and quality control
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be quiet! System Power 11 650W | ATX 3.1 PSU with PCIe 5.1 Support
The be quiet! System Power 11 650W is ATX 3.1 compliant and PCIe 5.1 compatible, offering reliable power delivery for value-oriented PC builders who demand quiet operation without compromising on stability. This German-engineered power supply unit delivers dependable performance with modern GPU support, efficient cooling, and comprehensive protection features.
Slim Specs Table
| Metric | Spec |
|---|---|
| Form Factor | ATX 3.1 |
| Maximum Power | 650W |
| Efficiency | 80 PLUS Bronze |
| Fan Size | 120mm |
| Warranty | 5 years |
ATX 3.1 Compliance for Modern GPU Stability
The System Power 11 650W meets ATX 3.1 specifications, ensuring stable power delivery during GPU-intensive workloads. This compliance means the PSU can handle power fluctuations from modern graphics cards, particularly during gaming or content creation tasks where GPU power demands spike. The robust 12V single-rail design provides consistent voltage regulation, protecting your components from power irregularities that could cause system instability or hardware damage.
PCIe 5.1 Ready for Next-Generation Graphics
With support for PCIe 5.1 GPUs, this PSU future-proofs your build for the latest graphics cards. The unit features one PCIe 5.1 12V-2×6 connector capable of delivering up to 600W, plus three PCIe 6+2 pin connectors for high-end GPUs. This configuration ensures compatibility with both current and upcoming graphics cards that demand higher power delivery through the PCIe slot, making it an ideal choice for gamers and professionals planning system upgrades.
Whisper-Quiet Operation with Quality Cooling
The temperature-controlled 120mm be quiet! fan operates at minimal noise levels while maintaining optimal cooling. At 10% load, noise registers at just 10.9dB(A), rising to 30.9dB(A) only under full load conditions. The rifle bearing technology and 4-pole fan motor ensure smooth, quiet operation throughout extended use. This makes the System Power 11 particularly suitable for home offices, recording studios, or any environment where system noise could be disruptive.
Energy Efficiency and Environmental Compliance
Achieving 80 PLUS Bronze certification with up to 90.0% efficiency at 230V, this PSU reduces electricity consumption and heat output. The modern standby feature ensures minimal power draw when your system is idle, consuming less than 0.15 watts in standby mode. Full compliance with ErP, WEEE, and RoHS directives demonstrates be quiet!’s commitment to environmental responsibility while helping users reduce their energy costs over the PSU’s lifetime.
Box contents
- be quiet! System Power 11 650W PSU
- Power cable
- Mounting screws
- Cable ties
- User manual
Check before you buy
- Confirm your case has sufficient space for ATX PSU dimensions (86 x 150 x 140mm)
- Verify your GPU requires PCIe 5.1 support or can use standard PCIe connectors
- Check your system’s total power requirements don’t exceed 650W continuous
- Confirm UK power outlet compatibility (230V, 50Hz)
Frequently Asked Questions
Q: Is this PSU compatible with older ATX motherboards?
A: Yes, the System Power 11 650W works with both modern and older ATX motherboards due to its ATX 3.1 compliance and standard connector layout.
Q: Can this power supply handle overclocking?
A: While not specifically designed for overclocking, the stable 12V single rail and 650W capacity provide reliable power for moderate overclocking scenarios.
Q: How many SATA drives can this PSU support?
A: The PSU includes 5 SATA power connectors, supporting up to 5 SATA drives or devices.
Q: Does this unit have modular cables?
A: No, the System Power 11 650W features fixed cables only, which may affect cable management in smaller cases.
Q: What protection features are included?
A: The PSU includes OTP, OCP, OPP, SCP, OVP, UVP, and SIP protection for comprehensive component safety.
The Consultant’s verdict & warranty
The be quiet! System Power 11 650W delivers exceptional value for PC builders seeking ATX 3.1 compliance and PCIe 5.1 readiness without premium pricing. Its quiet operation, German engineering, and comprehensive protection make it ideal for mainstream gaming and productivity systems. Covered by the standard Manufacturer Warranty.
| Weight | 2.6 kg |
|---|---|
| Power supply unit PSU form factor | ATX |
| 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 |
| 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 |
| 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 +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 rails | 1 |
| 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 |
| Sustainability certificates | ENERGY STAR, ErP |
| Compliance certificates | CB, CE, RoHS, TÜV mark, UKCA, WEEE |
| 80 PLUS certification | 80 PLUS Bronze |
| Waste Electrical and Electronic Equipment WEEE compliance | Yes |
| Width | 150 mm |
| Depth | 86 mm |
| Height | 140 mm |
| Weight | 1.97 kg |
| Package depth | 268 mm |
| Package width | 195 mm |
| Package height | 97 mm |
| Package type | Box |
| Package weight | 2.4 kg |
| 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 |
| Screws included | Yes |
| Cable ties included | Yes |
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