Introduction

We would like to thank Seasonic for supplying the review sample.


The Seasonic Connect is the first desktop PSU innovation I have come across in quite some time. The idea might look simple, but no other manufacturer has thus far introduced it in the way of a desktop PSU. This PSU consists of two parts: a modified version of the Seasonic SSR-750GD2 based on the popular Focus platform and a cable-hub backplane that is magnetically mounted to the PC case for all the usual PSU plugs. A non-modular PSU cable with a pair of connectors connects the PSU and backplane. The PSU's entire power output goes through this cable, including the +12 V, -12 V, and 5VSB rails.

Another innovation are the minor rails that are not generated inside the PSU, but the backplane, which reduces the distance between the DC-DC converters and those parts using these rails and results in lower voltage drops and increased efficiency. With shorter modular cables, cable management is also much easier, and airflow potentially improves as well because there is less cable clutter.

Seasonic revealed this PSU in a previous IT show, and I did wonder whether they would be brave enough to move forward with mass production. Thankfully, they have, and if sales go well, we will probably see more Connect models in the future. For the moment, the SSR-750FA is the first of its generation. Since it uses an enhanced version of the Focus platform, which I have extensively evaluated in the past, I expect high performance. I am curious about the performance differences on the minor rails, especially for transient response—the minor rails are in the Connect module, which puts them much closer to the load.

Specifications

Photos

 
With a depth of 140 mm, this PSU is compact.


The PSU might be compact, but the Connect module certainly is not as it is 33 cm tall and 2 cm thick, which means your chassis needs at least 2 cm clearance behind the motherboard tray for the side panel to close with the Connect module installed. Finally, the Seasonic Connect is priced fairly for its unique design and new features.


The box offers adequate protection, and the bundle is extensive.


The main difference to the Focus units is the use of a larger 135 mm fan. The larger fan could lead to lower noise output, but Seasonic's engineers tuned the fan speed profile aggressively, which results in a quite noisy operation (Cybenetics LAMBDA-S+ rating).

Cables and Connectors

The cable that connects the PSU with the Connect module is affixed to minimize energy loses. It is quite short, which makes installation easier. This cable has two connectors, a 20-pin for transferring power and a 10-pin for the sense gauges.


The modular cables are very short because the Connect module is installed much closer to the system's parts than the PSU. With two EPS and four PCIe connectors, you can build a strong gaming system with this power supply, while there are more peripheral connectors than usual as well. The only downside is the small distance between the 4-pin Molex connectors, and it would be nice if the SATA connectors were further apart as well.

Installation Procedure

Since this PSU touts an easier installation, it was imperative to also install it into a chassis to see if indeed the case.


I used the Phanteks Enthoo Evolv X chassis. It does not have that much space behind the motherboard tray. However, I didn't run into any major issues—I had to remove three Velcro strap bases and two screws used for SSD mounting to make room for the Connect module.


You can easily hide the short cables for increased airflow. There is also no need to worry about compatibility issues if the Connect module is placed properly.

Watch the following video for a better idea of a system with the Seasonic Connect PSU installed.