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Seasonic PRIME Fanless TX power supply unit 700 W 20+4 pin ATX ATX Black

Seasonic PRIME Fanless TX, 700 W, 100 - 240 V, 50 - 60 Hz, 4.5 - 9.5 A, 100 W, 696 W

Best offerPrice trend

£268.99

-29%
Price trend
Detailed analysis
Price history of Seasonic PRIME Fanless TX power supply unit 700 W 20+4 pin ATX ATX Black over the last 3 months
DatePrice
5 March 2026£379.40
9 March 2026£244.99
12 March 2026£246.99
14 March 2026£245.90
19 March 2026£245.90
22 March 2026£246.99
22 March 2026£261.86
27 March 2026£267.03
3 April 2026£268.99
4 April 2026£268.99
15 April 2026£268.99
24 April 2026£268.99
13 May 2026£268.99
21 May 2026£268.99

Compare Seasonic PRIME Fanless TX power supply unit 700 W 20+4 pin ATX ATX Black prices UK

*Date of last price update

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Product Information

PRIME Fanless TX utilizes the fanless technology, which eliminates the fan noise completely, ensuring truly quiet operation. The unit not only is rated to be 80PLUS Titanium efficient, but it also has the highest power output on the fanless power supply market at the moment. The power supply is ideal any situations that demand silence from the equipment. The high quality components inside and the innovative circuit design result in clean and stable power output. The fully modular cables allow for better cable management in the computer case.

80 PLUS® Titanium
The PRIME Titanium Series achieves the highest level of 80 PLUS® Titanium certification on the market with its 94 % efficiency at 50 % system load.

Micro Tolerance Load Regulation
Seasonic’s latest design keeps the output voltage within a very tight range, achieving under 0.5 % load regulation. This impressive electrical performance and stability makes this power supply an ideal choice for high-performance systems.

Seasonic Fanless Design
Cooling fans inside the power supply are replaced by passive cooling based on heat dissipation. Silent operation does not only provide a more pleasant working environment but it also results in less power consumption and lower utility bills.

Power Supply Units Seasonic

Product

Name
Seasonic PRIME Fanless TX power supply unit 700 W 20+4 pin ATX ATX Black

Power

Total power
700 W
AC input voltage
100 - 240 V
AC input frequency
50 - 60 Hz
Input current
4.5 - 9.5 A
Combined power (+3.3V)
100 W
Combined power (+12V)
696 W
Combined power (+5V)
100 W
Combined power (-12V)
3.6 W
Combined power (+5Vsb)
15 W
Max output current (+3.3V)
20 A
Max output current (+12V)
58 A
Max output current (+5V)
20 A
Max output current (-12V)
0.3 A
Max output current (+5Vsb)
3 A
Efficiency
94%
Power protection features
Over current, Over power, Over voltage, Short circuit, Under voltage

Operational conditions

Operating temperature (T-T)
0 - 45 °C

Weight & dimensions

Width
150 mm
Depth
170 mm
Height
86 mm

Ports & interfaces

Motherboard power connector
20+4 pin ATX
Peripheral (Molex) power connectors (4-pin)
3
Motherboard power cable length
61 cm
Number of SATA power connectors
3
SATA power cable length
450,800,810 mm
Peripheral (Molex) power cable length
300,470,690 mm
PCI Express power connectors (6+2 pin)
4
PCI Express power cable length
75 cm
CPU power cable length
65 cm
CPU power connectors (8-pin)
2
Cabling type
Fully-Modular

Packaging data

Package type
Box

Performance

Purpose
PC
Power supply unit (PSU) form factor
ATX
80 PLUS certification
80 PLUS Titanium
Supported motherboard form factors
ATX
Mean time between failures (MTBF)
150000 h

Design

Product colour
Black
Cooling type
Passive
On/off switch
Yes

Logistics data

Harmonized System (HS) code
84733020

Technical details

Sustainability certificates
ENERGY STAR

Certificates

Compliance certificates
RoHS
Certification
cTUVus, TUV, CB, CCC, BSMI, EAC, CE, WEEE, ErP Lot 6, REACH

Customer Reviews

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