be quiet! TFX POWER 3 300W Gold Power Supply
£59.48
In stock
COMPACT & SILENT ENERGY
be quiet! TFX Power 3 300W Gold
A high-efficiency, space-saving TFX PSU designed for mini and media PCs — 80 PLUS® Gold efficiency, stable dual 12V rails, and quiet temperature-controlled cooling, with PCIe GPU support when your compact build needs more than “basic”.
TFX12V v2.52 • EPS 12V v2.92
Strong Dual 12V Rails • PCIe 6+2 Support
Quiet 80mm Fan • Up to 21.7 dB(A)
3-Year Manufacturer Warranty
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Core Highlights
- 300W continuous power (350W peak)
- 80 PLUS® Gold efficiency (up to 91.7%)
- Strong dual 12V rails for stable operation
- 1× PCIe 6+2 connector for discrete GPU support
- High-quality, temperature-controlled 80mm fan (up to 21.7 dB(A))
- Standby draw under 0.17W • Modern Standby ready
80 PLUS® Gold Certification
Certified 80 PLUS® Gold with an efficiency rating of up to 91.7% at 230V (50% load). Higher efficiency means less heat, lower energy waste, and a cooler-running compact PC.
Up to 91.7% (230V)
Active Clamp Topology
Strong Dual 12V Rails
Dual 12V rails improve stability by supplying the CPU on an independent rail, while still providing the headroom needed for demanding peripherals — including a PCIe connector for a dedicated graphics card.
PCIe 6+2 • 1 connector
Max. Combined 12V • 288W
Quiet & Safe Operation
A temperature-controlled fan keeps acoustics low while maintaining reliable cooling in compact enclosures. Comprehensive protection circuits help defend your system against common electrical faults for long-term peace of mind.
Rifle Bearing
OCP / OPP / SCP / OVP / UVP / SIP
Compact Cabling for Small Builds
Designed for clean routing in tight cases: sleeved or flat black cables up to 60cm long, with a practical set of connectors for mini and media PC configurations.
ATX 20+4 • 1
SATA • 3
PATA • 2
Built to Last
Engineered for dependable daily use with an average lifetime of 100,000 hours (at 25°C) and product conception, design, and quality control in Germany — backed by a 3-year manufacturer warranty.
Operating Temp • Up to 40°C
Warranty • 3 Years
General Specifications
Performance & Efficiency
Cooling & Acoustics
Power Rails & Output
Connectivity & Cables
Protection & Safety
Physical & Build
| Data Sheet | |
| Manual | |
| Cables | |
| Performance curve |
About be quiet!
be quiet! is a premium German PC hardware brand, recognised worldwide for designing high-performance components with an uncompromising focus on silence.
Founded in Germany, be quiet! has earned the trust of enthusiasts, gamers, creators and system builders the world over through exceptional build quality, reliability and near-silent operation.
German Engineering
Premium Components
Long Warranties
Designed in Germany
Every be quiet! product is engineered and quality-controlled in Germany, with meticulous attention to acoustics, airflow, thermals and long-term durability.
That engineering-first approach means each one performs exactly as intended: quietly and efficiently.
What be quiet! is known for
- Ultra-quiet, high-efficiency power supplies
- High-performance CPU coolers with silent operation
- Low-noise PC cases optimised for airflow and reduced vibration
- Premium fans engineered for strong airflow at minimal noise
Trusted by enthusiasts and professionals
be quiet! hardware is widely used in gaming PCs, professional workstations, content-creation systems, and quiet home and office builds.
As an authorised UK service centre, we supply genuine be quiet! products backed by full manufacturer warranty and local UK support.
Shipping & Delivery Information
Dispatch cut-off: 2:00pm
UK shipping only
- 🚚
UK mainland: Free standard next-day / 2-day delivery (subject to courier terms). - ⏱️
Same-day dispatch: Order before 2:00pm Monday–Friday. - 📍
Extended areas: Highlands, NI, ROI & Channel Islands typically 2–5 working days. - 🛑
No collection: We ship orders only.
Shipping Only
Please note that we do not offer collections. All orders are shipped via our courier partners.
Delivery services are subject to courier availability and local conditions.
Weekend Orders
Orders placed after 2:00pm on Friday or during the weekend
are processed on the next working day (normally Monday).
Bank holidays may also affect dispatch and delivery times.
UK Delivery
Free standard next-day / 2-day to UK mainland (subject to courier terms)
- ✅Free standard delivery on all orders
- 📦UK mainland only for next-day / 2-day services
- 🕑Cut-off: order before 2:00pm (Mon–Fri) for same-day dispatch
Extended Delivery Areas
Typically 2–5 working days
- 🏔️Scottish Highlands
- 🇬🇧Northern Ireland
- 🇮🇪Republic of Ireland
- 🏝️Channel Islands
Delivery times can vary depending on courier availability and local conditions.
International Shipping
We do not ship outside the UK
Delivery times are estimates and may be affected by courier delays outside of our control.
