be quiet! System Power 11 450W PSU 80+ Bronze ATX Power Supply
Proven reliability and quiet operation for value-oriented users. The be quiet! System Power 11 450W delivers ATX 3.1 compatibility, PCIe 5.1 GPU support, and 80+ Bronze efficiency with whisper-quiet operation. Features temperature-controlled 120mm fan and remarkably low standby power consumption.
Advanced ATX 3.1 Compatibility
Full ATX 3.1 compatibility with PCIe 5.1 GPU support for modern graphics cards.
Two PCIe 6+2 pin connectors provide flexible power options for various GPU configurations.
Strong 12V rail delivers rock-solid stability for demanding graphics cards and components.
Temperature-controlled 120mm quality fan reduces system noise significantly.
Just 10.5 dBA at 10% load and 19.1 dBA at full load for whisper-quiet computing.
Silence-optimized be quiet! fan with rifle bearing technology ensures long-term reliability.
Achieves 80+ Bronze certification with up to 89% efficiency at 50% load.
DC-to-DC technology provides tight voltage regulation and improved power delivery.
Standby power consumption less than 0.15 watts for energy-efficient operation.
Multiple protection features including OTP, OCP, OPP, SCP, OVP, UVP, and SIP.
Double forward + DC-DC topology ensures stable power delivery under all conditions.
Over 100,000 hour average lifetime at 25°C for exceptional reliability.
Technical Specifications
| Feature | Specification |
|---|---|
| Continuous Power | 450W |
| Form Factor | ATX 3.1 |
| Efficiency | 80+ Bronze (up to 89% at 50% load) |
| Fan | 120mm silence-optimized, rifle bearing 1800 RPM max, temperature-controlled |
| Noise Levels | 10.5 dBA (10% load) to 19.1 dBA (100% load) |
| 12V Rail | Single rail, 37.5A, 450W max |
| Connectors | 1x ATX 20+4 pin 1x P4+4 CPU 2x PCIe 6+2 pin 5x SATA 1x PATA |
| Protection | OTP, OCP, OPP, SCP, OVP, UVP, SIP |
| Input Voltage | 200-240V AC, 50Hz |
| Standby Power | Less than 0.15W |
| Dimensions | 150 x 140 x 86mm |
| Weight | 1.7kg |
| Certifications | 80+ Bronze, CE, TÜV, Energy Star 8.0 |
| Warranty | 5 Years |
What's Included
- be quiet! System Power 11 450W PSU
- Power cable
- Mounting screws
- Cable ties
- User manual
Perfect for Entry-Level Builds
Ideal for budget gaming systems, office computers, media centers, and entry-level workstations. The 450W capacity is perfect for systems with mid-range graphics cards and provides reliable, quiet power delivery for everyday computing needs.
Complete Your System Build
Free Shipping.
Delivery to UK mainland - Dispatched same working day if the order is placed before 4:15pm and payment is received.
We offer free shipping for the orders weighing under 2 Kg to Scottish Highlands, Northern Ireland and the Isle of Man, parcels over 2 Kg will have an additional shipping fee to cover the additional costs charged by the carrier for those locations.
Our sales centre is open Monday to Friday from 8:30am to 5:00pm, Saturday 9:00am to 11:am. OR you can send us an eBay message if you prefer.
We want you to be absolutely satisfied with your purchase. In the unlikely event that you have to change your mind, you may return any product within 30 days.
Please make sure the product is in excellent condition, the returned parcel contains everything (including remote, owner's manual, power cord etc.) and is securely packed using the original packaging.
Incomplete returns or missing the original box are subject to adjusted refund amounts, down to 50% of acquisition value.
We accept payment by any of the following methods:
- eBay Payments
Please pay as soon as possible after purchasing with Buy It Now or winning an auction, as that will allow us to post your item to you sooner!
VAT invoice will be automatically sent to your registered Ebay email address. If this hasn't happened, please do not hesitate to contact us providing the email address where you want the VAT invoice to be sent.
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