Power Supply Unit be quiet! TFX POWER 3

Name: Power Supply Unit be quiet! BN323
Brand: bequiet!
SKU: 4114463
Price: 99.49 EUR
Availability: InStock

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Power Supply Unit be quiet! TFX POWER 3 300W Gold

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Offer for legal entity, cashless payment. Why is an item available only for a legal entity?
This is due to long delivery times and limited product warranties.

Short description

The be quiet! TFX POWER 3 300W Gold power supply unit offers reliable performance with a total power of 300W and peak power of 350W. It features a 20+4 pin ATX motherboard connector and comes with a 35 cm power cable. The SATA power cables are available in lengths of 300, 450, and 600 mm. With an 80 PLUS Gold certification, this active cooling PSU ensures efficient power delivery for your PC. The compact TFX form factor and 8 cm fan diameter provide optimal cooling while maintaining a sleek black design. Compliance with RoHS and WEEE standards ensures environmental safety.

Available for order: 3 pcs.

Warranty: 2 Years

SKU: 4114463

Manufacturer: bequiet!

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Deliver the order:

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to the Customer Service Center at Kengaraga 2b, Riga

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Customer service center

2b. Kengaraga str., Riga, Latvia, LV-1063

14.07.2026 {{selectedOffer.officeDeliveryString}}

free

Courier Delivery Please note that in case of a large parcel additional delivery costs may apply!

17.07.2026 {{selectedOffer.courierDeliveryString}}

From 4.99 € (Weight: 1.46 kg)

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Latvijas Pasts pakomāts / Unisend / DPD Paku skapis / Omniva / Venipak Pickup / Venipak Locker / Latvijas Pasts nodaļa

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Product information

Description

be quiet! TFX POWER 3 300W Gold is a compact TFX power supply unit designed for mini and media PCs. It delivers 300 W continuous power with up to 350 W peak output, offers 80 PLUS Gold efficiency, and provides stable voltages for systems that may include a PCIe graphics card. The unit features a 20+4 pin ATX motherboard connector, multiple SATA power cable lengths, an 80 mm fan for active cooling and a black housing that fits space-constrained builds.

Advantages

The TFX POWER 3 300W Gold combines high efficiency (80 PLUS Gold) with reliable voltage delivery and a compact TFX form factor suitable for small chassis. Its active cooling with an 80 mm fan maintains acceptable operating temperatures while keeping noise low. Multiple SATA cable lengths and a 20+4 pin ATX connector simplify installation in tight interiors. Compliance with RoHS and WEEE standards ensures environmental safety.

Suitable for

Mini-ITX and other small form factor systems using TFX PSUs
Home theatre PCs and media centers
Office PCs with limited internal space
Systems requiring an 80 PLUS Gold efficient power supply

Key specifications

Total power: 300 W (350 W peak)
Efficiency: 80 PLUS Gold (approx. 90.6%)
Motherboard connector: 20+4 pin ATX
Fan diameter: 80 mm
Power cables: 35 cm main power cable; SATA cables 300 / 450 / 600 mm
Form factor: TFX
Product colour: Black
Weight: 1.1 kg

How to use

Install the PSU into a compatible TFX chassis following the case manufacturer’s instructions. Connect the 20+4 pin ATX cable to the motherboard and route SATA and peripheral cables as needed to storage drives and other devices. Ensure the PSU is securely mounted and that airflow around the 80 mm fan is not obstructed. Verify voltage rails and power connections before powering on the system.

Usage recommendations

For reliable operation, keep total system power draw below the continuous 300 W rating and allow for peak loads up to 350 W. Use in well-ventilated small form factor cases and periodically check cables and connections. Avoid loading the unit beyond its specifications to maintain efficiency and longevity.

Specifications

Total power:: 300 W
Efficiency:: 90.6 %
Motherboard power connector:: 20+4 pin ATX
80 PLUS certification:: 80 PLUS Gold
Fan diameter:: 80 mm
Weight:: 1.1 kg
Product colour:: Black

All features

Power

Total power:: 300 W
Efficiency:: 90.6 %
Power Factor Correction (PFC) type:: Active
Peak power:: 350 W
Hold time:: 29 ms
Power protection features:: Under voltage, Short circuit, Over voltage, Over power, Over current
Power factor:: 0.98
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 (+5V):: 18 A
Max output current (-12V):: 0.3 A
Max output current (+5Vsb):: 3 A
Input current:: 4/2
AC input frequency:: 50 - 60
AC input voltage:: 100 - 240
Max output current (+12V2):: 13 A
Max output current (+12V1):: 13 A
Maximum input current (@110V):: 4 A
Maximum input current (@220V):: 2 A

Ports & interfaces

Motherboard power connector:: 20+4 pin ATX
Floppy drive power connector:: 1
Number of SATA power connectors:: 3
Peripheral (Molex) power connectors (4-pin):: 2
CPU P4 connector (4-pin):: 1
PCI Express power connectors (6+2 pin):: 1
Cabling type:: Non-Modular
Motherboard power cable length:: 350 mm
SATA power cable length:: 600, 300, 450
CPU power cable length:: 350 mm
Peripheral (Molex) power cable length:: 450, 300
PCI Express power cable length:: 400 mm
Floppy disk drive cable length:: 600 mm

Performance

Purpose:: PC
80 PLUS certification:: 80 PLUS Gold
Mean time between failures (MTBF):: 100000 h
Noise level: Not only energy saving helps to protect the environment but also noise level reduction. Noise level reduction up to 3 dB really means noise level reduction in 2 times. For example, a device with noise level 39 dB (А) will be two times quieter than a devise with a noise level 42 dB (А). Energy-saving certificate that shows noise level plays the role of an additional objective indicator basing on which You can successfully choose a product.: 21.7 dB
ATX version:: 2.52
EPS version:: 2.92
Power supply unit (PSU) form factor:: TFX

Design

Fan diameter:: 80 mm
Number of fans:: 1 fan(s)
Cooling type:: Active
Product colour:: Black

Certificates

Compliance certificates:: RoHS, WEEE

Technical details

Sustainability compliance:: Yes
Sustainability certificates:: ENERGY STAR, ErP

Weight & dimensions

Weight:: 1.1 kg
Height:: 65 mm
Width:: 85 mm
Depth:: 175 mm

Packaging data

Package weight:: 1430 g
Package depth:: 80 mm
Package height:: 215 mm
Package width:: 159 mm
Package type:: Box

Logistics data

Shipping (inner) case width:: 275 mm
Shipping (inner) case length:: 474 mm
Shipping (inner) case height:: 195 mm
Shipping (inner) case gross weight:: 9390 g
Products per shipping (inner) case:: 6 pc(s)
Harmonized System (HS) code:: 84733020

Safety regulation & standards

Safety:: CE, CB, TÜV, CU

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Instructions

mmo_91303777_1618324212_4692_23255.pdf

bequiet-BN323-4114463.pdf

Description

Instructions

mmo_91303777_1618324212_4692_23255.pdf

bequiet-BN323-4114463.pdf

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Customer questions

FAQ

How much does the Power Supply Unit be quiet! TFX POWER 3 cost, and is it available for purchase?

The price is 99.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 3 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 14.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

What payment options are available?

AiO.lv offers several payment methods: Bank transfer. All transactions are 100% secure and encrypted.

Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

What is the warranty period?

All bequiet! products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized bequiet! service centers and through AiO.lv

Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. We will assist with consultation, warranty claim processing, and coordination with certified service centers.

How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: total power, efficiency, motherboard power connector, 80 plus certification, fan diameter, weight, product colour, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

Where can I download the instructions for Power Supply Unit be quiet! TFX POWER 3?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

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