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Rectangular fanless ATX power supply with matte black finish and modular cable sockets

Seasonic

Seasonic PRIME FANLESS TX-700 700W power supply

SKU CH-BFQW-RXDEY MPN PRIME FANLESS TX-700

A fanless 700 W ATX supply with 80 PLUS Titanium efficiency, fully modular cabling and a single +12 V rail rated at 58 A

  • Max wattage700 W
  • Modular cablingFull Modular
  • Fan configurationFanless
  • Main power connector20+4Pin
  • 12V railsSingle
  • PCIe power connectors4 × 6+2-Pin

Model ATX Titanium (700W) Fanless

  • Silent operation with fanless design eliminates noise
  • 80 PLUS Titanium certified efficiency reduces energy waste
  • Full modular cabling uses only needed cables
  • Micro tolerance load regulation under .5 percent ensures stable power
  • 700 watt output with single +12V rail at 58 amps

Silent 700 W Titanium unit

The Seasonic PRIME FANLESS TX-700 is a 700 W ATX12V power supply that uses a completely fanless design to deliver silent operation. It carries 80 PLUS Titanium certification and a Cybenetics A++ noise rating, so energy waste stays minimal while the system runs without any moving parts inside the PSU.

Ideal for quiet builds; not for extreme multi-GPU

This unit suits builders who want a noise-free PC for workstations, media centres or high-end single-GPU gaming rigs. The single +12 V rail rated at 58 A handles modern graphics cards, but systems that need more than four PCIe power connectors or substantially higher wattage should consider a larger model.

Full-modular cables simplify assembly

Full-modular cabling lets you connect only the 24-pin, two CPU, four PCIe and ten SATA leads required, reducing clutter and improving airflow. The compact 170 mm depth fits most standard ATX cases, while the wide 100–240 V input range allows worldwide use without a voltage switch.

How it compares

Measured against everything we stock in ATX Desktop Power Supplies, at today’s prices. Recalculated every night.

Price $215.99
Pricier than about 66% of the 10,869 comparable items (median $142.99).
Max wattage 700 W
Lower than about 65% of the 930 comparable items (median 850 W).

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Specifications

Product
Brand nameSeaSonic
Product linePRIME Fanless TX
Model namePRIME FANLESS TX-700
Product typeATX12 V
Ports & slots
PCIe power connectors4 × 6+2-Pin
SATA power connectors10
Output type+3.3 V@20A, +5 V@20A, +12 V@58A, +5VSB@3A
Connection types1 x MB (24/20 pins)
2 x CPU (8/4 pins)
4 x PCIe (8/6 pins)
10 x SATA
5 x Molex
1 x Molex to SATA 3.3 Adapter
Power
Max wattage700 W
Modular cablingFull Modular
Main power connector20+4Pin
12V railsSingle
Efficiency certification80 PLUS TITANIUM Certified
Overvoltage protectionYes
Supply voltage100–240 V
AC input frequency50/60 Hz
Rated input current9.5–4.5 A
Size & build
Product dimensions3.39 in × 5.91 in × 6.69 in
Product weight4.17 lb (1.89 kg)
Shipping weight3.36 kg
Package size349 × 191 × 114 mm
Compatibility
PSU length limit170 mm
Environment & compliance
PSU noise ratingCybenetics A++
Regulatory approvalscTUVus, TUV, CB, CCC, BSMI, EAC, CE
Energy Star, RoHS, WEEE, ErP Lot 6, REACH
More details
Fan configurationFanless
Mean time between failures150,000 h

Other versions of this model

5 more in the same range

Questions about this item

What motherboard power connector does the PRIME FANLESS TX-700 require?

The unit ships with a 20+4 pin main connector that fits any standard ATX motherboard socket.

Will the single +12V rail rated at 58 A support an older graphics card that uses two 6-pin PCIe plugs?

Yes, the PSU includes four 6+2 pin PCIe cables and the single 12 V rail delivers up to 58 A, so two 6-pin connectors are well within its capacity.

How can I confirm the fanless 700 W unit is running within its Cybenetics A++ noise rating after installation?

With no moving parts the PSU produces zero audible noise; if the system powers on and remains silent under load, the fanless design is functioning as specified.

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