Seasonic Prime Fanless 700 W Review 24

Seasonic Prime Fanless 700 W Review

Teardown & Components »


There is only a small photo of the product on the back of the box. You will only find the model description, efficiency badge, and warranty period at the face of the package, the last of which is incredibly long at twelve years.

Protection inside the box is good, and the bundle is rich. Besides the usual stuff, we have Velcro straps, zip ties, a connector to jump-start the PSU, and the case badge. Seasonic also gives you the opportunity to win a $50 Steam e-gift by performing a few tasks.

The chassis is full of perforations for hot air to easily leave the PSU's internals. Since there is no cooling fan, this is the easiest way to keep temperatures under control.

Since there is no space on the sides for labels, there is one at the base of the PSU, leaving room for some more exhaust grilles.

The modular panel has 13 sockets; two for the 24-pin ATX connector, five for the peripheral cables, and six for the EPS and PCIe cables.

The silver Prime badge stands out on the top grille. Chassis dimensions are on the larger side of average to host the large PCB.

Cables and Connectors

Modular Cables
DescriptionCable CountConnector Count (Total)GaugeIn-Cable Capacitors
ATX connector 20+4 pin (600 mm)1118-22AWGYes
4+4 pin EPS12V (660 mm)2218AWGNo
6+2 pin PCIe (760 mm)4418AWGNo
SATA (410 mm+150 mm+150 mm+150 mm)1418AWGNo
SATA (450 mm+120 mm+120 mm+120 mm)1418AWGNo
SATA (300 mm+160 mm)1218AWGNo
4 pin Molex (450 mm+125 mm+125 mm)1318AWGNo
4 pin Molex (360 mm+125 mm)1218AWGNo
4 pin Molex to SATA 3.3 Adapter (150 mm+150 mm)1218AWGNo
AC Power Cord (1360 mm) - C13 coupler1118AWG-

The are lots of cables and connectors, with the peripheral cables different lengths to choose the best ones for your system, unless you have tons of peripheral devices. All cables are long, and only the ATX one has inline caps for better ripple suppression.

On two of the three SATA cables, the distance between connectors is long, and the same goes for the Molex to SATA 3.3 adapter. It would be nice to see the 4-pin connectors spaced apart 150 mm, too; however, I won't complain (a lot) since 125 mm is decently close to that figure.
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