be quiet! TFX Power 3 300W PSU
£57.92 inc VAT
In stock
In stock
More Ways to Pay
-
Buy now, pay later with Klarna at checkout
-
Pay in 3 interest-free payments with PayPal at checkout
About This Item
- TFX form factor for compact PC builds
- 300W continuous power with 350W peak capacity
- 80 PLUS Gold certified for high efficiency
- Active cooling with 8cm fan, 0-1323 RPM range
- 21.7 dB noise level for quiet operation
- 2x +12V rails with comprehensive protection features
Payment Methods:
You may also like
be quiet! TFX Power 3 300W Gold | Compact PSU for Small Builds
The be quiet! TFX Power 3 300W Gold power supply unit 20+4 pin ATX Black delivers efficient, silent power in a compact TFX form factor. Designed for mini-ITX and media centre PCs, it supports modern components including PCIe graphics cards while maintaining whisper-quiet operation. The 80 PLUS Gold certification ensures high efficiency, reducing heat and energy waste in space-constrained builds.
Key Specifications
| Metric | Spec |
|---|---|
| Form Factor | TFX |
| Total Power | 300W |
| Efficiency | 90.6% (80 PLUS Gold) |
| Noise Level | 21.7 dB |
| MTBF | 100,000 hours |
Efficient Cooling for Silent Operation
The 80mm rifle-bearing fan delivers effective cooling without excessive noise. With a speed range of 0-1323 RPM and intelligent fan control, the PSU remains virtually silent under light loads. This makes it ideal for media PCs or home theatre systems where acoustic performance matters as much as reliability.
Compact Design Without Compromise
Measuring just 85mm x 175mm x 65mm, this PSU fits where standard ATX units cannot. The non-modular cabling keeps costs down while providing all necessary connections including 20+4 pin ATX, PCIe 6+2 pin, and multiple SATA/Molex connectors. Despite the compact size, it delivers solid 12V rail performance with 288W combined output across two rails.
Built-In Protection for Component Safety
Comprehensive power protection features safeguard your system from electrical damage. Over current, over power, over voltage, short circuit, surge & inrush protection (SIP), and under voltage protection work together to prevent component failure. The 29ms hold-up time ensures stable operation during brief power fluctuations.
In the Box
- be quiet! TFX Power 3 300W Gold PSU
- Mounting screws
- Cable ties
- User manual (German, English, Spanish, French, Polish, Russian)
Key Points to Check
- Confirm your case supports TFX form factor (85mm x 175mm x 65mm)
- Verify your GPU’s power requirements don’t exceed 300W total
- Check available PCIe power connector compatibility (6+2 pin)
- Ensure adequate ventilation for the compact PSU design
Frequently Asked Questions
Is this PSU compatible with standard ATX cases?
Can it power a dedicated graphics card?
What does 80 PLUS Gold certification mean?
Is the fan always running?
Buying advice
The be quiet! TFX Power 3 300W Gold power supply unit 20+4 pin ATX Black represents excellent value for small form factor PC builders prioritising silence and efficiency. Its compact dimensions, comprehensive protection, and Gold efficiency rating make it perfect for media PCs, home theatre systems, and compact gaming rigs with modest power requirements. Covered by the applicable manufacturer warranty.
| Weight | 1.45 kg |
|---|---|
| Purpose | PC |
| EPS version | 2.92 |
| Noise level | 21.7 dB |
| Mean time between failures MTBF | 100000 h |
| Bearing technology | Rifle |
| Product colour | Black |
| Fan diameter | 8 cm |
| On/off switch | No |
| Number of fans | 1 fan(s) |
| Fan speed | 0 – 1323 RPM |
| Cooling type | Active |
| Total power | 300 W |
| Maximum input current 220V | 2 A |
| Peak power | 350 W |
| AC input voltage | 100 – 240 V |
| AC input frequency | 50/60 Hz |
| Power factor | 0.98 |
| Maximum input current 110V | 4 A |
| Combined power +3.3V | 103 W |
| Combined power +12V | 288 W |
| Combined power +5V | 103 W |
| Max output current +3.3V | 18 A |
| Max output current +12V1 | 13 A |
| Max output current +12V2 | 13 A |
| Max output current +5V | 18 A |
| Max output current -12V | 0.3 A |
| Max output current +5Vsb | 3 A |
| Power protection features | Over current, Over power, Over voltage, Short circuit, Surge & inrush protection (SIP), Under voltage |
| Hold time | 29 ms |
| Efficiency | 90.6% |
| Number of +12V rails | 2 |
| Motherboard power cable length | 35 cm |
| SATA power cable length | 300,450,600 mm |
| Peripheral Molex power cable length | 300,450 mm |
| PCI Express power cable length | 40 cm |
| CPU power cable length | 35 cm |
| Motherboard power connector | 20+4 pin ATX |
| Number of SATA power connectors | 3 |
| Number of PATA power connectors | 2 |
| Peripheral Molex power connectors 4-pin | 2 |
| PCI Express power connectors 6+2 pin | 1 |
| CPU P4 connector 4-pin | 1 |
| Floppy drive power connector | 1 |
| Cabling type | Non-Modular |
| Number of SATA power cables | 1 |
| Operating temperature T-T | 0 – 40 °C |
| Sustainability certificates | ENERGY STAR, ErP, Triman |
| Compliance certificates | CB, CE, RoHS, TÜV mark, WEEE |
| Waste Electrical and Electronic Equipment WEEE compliance | Yes |
| Width | 85 mm |
| Depth | 175 mm |
| Height | 65 mm |
| Weight | 1.1 kg |
| Package depth | 82 mm |
| Package width | 159 mm |
| Package height | 215 mm |
| Package weight | 1.4 kg |
| Manual languages | German, English, Spanish, French, Polish, Russian |
| Shipping inner case width | 27.5 cm |
| Shipping inner case net weight | 9.4 kg |
| Shipping inner case length | 47.4 cm |
| Shipping inner case height | 19.5 cm |
| Products per shipping inner case | 6 pc(s) |
| Warranty period | 3 year(s) |
| Screws included | Yes |
| Cable ties included | Yes |
| Manual | Yes |
Reviews
Clear filtersThere are no reviews yet.