PRIME FANLESS TX-700
The Seasonic PRIME FANLESS TX-700 is a 700W ATX power supply rated 80+ Titanium, fully modular, with a 12V-2x6 connector for a modern graphics card. We do not hold a measured noise grade for this unit, so treat noise as unknown rather than as bad. Full specs, quality score and current prices are below.
Prices update regularly and may differ at the retailer. This page contains affiliate links.
Quality score
How we score →A power supply has no performance benchmark: every 700W unit delivers 700W. This scores how well built and how liveable the PRIME FANLESS TX-700 is, out of 100, from six published factors.
Better always scores higher, but the steps are uneven on purpose: Bronze to Gold is worth 11 of the 25 efficiency points, Gold to Titanium only 6. A factor we hold no value for scores zero rather than being skipped, so a unit we know little about never outranks a fully specified one. That does mean a zero can mean either poor or unknown, which is what the confidence figure above is for. Physical size scores nothing: ATX is a fit decision, not a quality one.
Measured in the lab
Everything else on this page is a specification the manufacturer published. These figures were measured from the PRIME FANLESS TX-700 itself by Cybenetics, an independent test lab.
- Average efficiency
- 91.6%Averaged across the full load range
- Average noise
- 6.0 dB(A)Cybenetics grade A++, fanless, averaged across the load range
- Zero-RPM mode
- NoThe fan runs at every load
Each figure is an average over more than 1,450 load combinations, which is not the same measurement as the 80+ Titanium badge on the box. That badge certifies the unit at a handful of fixed load points; this covers the whole range, including the light loads a desktop spends most of its time at. Lab figures exist for roughly a fifth of the units we track, so their absence on another page means that unit has not been through this lab, not that it did badly.
Specifications
Output & Rating
- Continuous power
- 700 W
- Efficiency
- 80+ Titanium
- Price per watt
- $0.524/W
Connectors
- Motherboard
- 20+4-pin
- CPU (EPS)
- 2 (4+4)
- PCIe
- 4 (6+2)
- 12V-2x6 / 12VHPWR
- 12+4
- SATA
- 10/12
- Molex (4-pin)
- 5
Physical
- Form factor
- ATX
- Depth
- 170 mm
- Modularity
- Fully modular
- Cable colour
- black
- Colour
- black
- RGB
- No
Platform
- Built by
- Seasonic
Electrical & Warranty
- Protections
- OPP, OVP, UVP, SCP, OCP, OTP
- Input voltage
- 100-240 V
- Input frequency
- 50-60 Hz
- Part number
- PRIME TX-700
Compare the PRIME FANLESS TX-700 against every other unit on the power supply comparison table. Not sure how much wattage you need? The power supply guide works through the sizing.
Where to buy the PRIME FANLESS TX-700
Every in-stock retailer offer we track, cheapest first.
| Retailer | Availability | Price | Updated | Buy |
|---|---|---|---|---|
| Amazon | In stock | $367.00 |  | |
| Newegg | In stock | $454.95 |  |
The PRIME FANLESS TX-700 starts from $367.00 across 2 retailers, which works out at $0.524/W. Prices update daily from live stock.
What the PRIME FANLESS TX-700 can power
Compare all GPUs →The graphics cards this 700W unit meets the system requirement for, ranked fastest first at 1440p, with the margin left over. The resolution follows the wattage, because a unit this size is bought for a card that will be run at 1440p. Headroom is measured against the card maker’s own whole-system recommendation, so 0 W means it meets that recommendation exactly rather than falling short.
| Graphics card | Card draw | PSU advised | Headroom |
|---|---|---|---|
| GeForce RTX 4070 Ti Super Nvidia | 285 W | 700 W | +0 W |
| Radeon RX 9070 AMD | 220 W | 650 W | +50 W |
| GeForce RTX 4070 Ti Nvidia | 285 W | 700 W | +0 W |
| Radeon RX 7900 GRE AMD | 260 W | 700 W | +0 W |
| GeForce RTX 5070 Nvidia | 250 W | 650 W | +50 W |
| GeForce RTX 4070 Super Nvidia | 220 W | 650 W | +50 W |
| Radeon RX 9070 GRE AMD | 220 W | 650 W | +50 W |
| Radeon RX 7800 XT AMD | 263 W | 700 W | +0 W |
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