Seasonic FOCUS SGX-450 450W SFX-L PSU Review

Author:Paul Johnson

Editor:Kyle Bennett

Date: Monday , December 31, 2018

Seasonic is delving deeper into the small form factor end of the power supply pool with its new FOCUS SGX. The SGX-450 has a 125mm x 125mm footprint, is supplied with an ATX adapter bracket, is fully modular, carries Gold efficiency certification, and comes with Seasonic's rock solid 10 year warranty.


In the power supply realm, when consumers think of quiet and efficient power supplies one of the first companies that comes to mind is Seasonic. Today, we are having a look at the first SFX-L model in Seasonic's FOCUS lineup; the 450W FOCUS SGX called the SGX-450 (SSR-450SGX).

Seasonic is one of the older companies producing consumer power supplies having been founded in 1975 and entering the PC power supply production market in 1980. During that more than 40 years as a company Seasonic has cultivated lines of power supplies that are today some of the standard bearers for efficiency and quiet computing. This focus, and its reputation for quality, has lead to an explosion in production as Seasonic can be found providing OEM services on various model lines for Antec, XFX, Corsair, PC Power and Cooling, and of course under its own Seasonic brand.

Since It Is That Time Of Year, We Are Going To FOCUS on TIny Tim

Today, we are looking at our 1st SFX-L unit from Seasonic's FOCUS line of power supplies. Prior to this, we have seen a lot of units in the FOCUS PLUS lineup and all of those units have been excellent products. The thing is, all of them were also ATX12v/EPS units and not the much smaller SFX-L form factor units which is important. Life is full of trade offs and that applies to power supplies too. How? Well, a smaller unit means you don't have quite the freedom that you do with a larger one when it comes to component selection and design coupled with cooling and, potentially, noise issues. So, today, we are going to be very interested to see how the FOCUS PLUS line carries on when things get a good bit smaller. First though, let's look at what Seasonic has to say about the unit:


The long-awaited new line of Seasonic's FOCUS SGX is versatile in its application, and powerful with a small footprint. The FOCUS SGX is shipped with an SFX to ATX adapter bracket in the box, which allows the power supply to be mounted not only in the SFX form factor chassis, but also a standard ATX chassis should the user prefers to reserve more space for airflow inside the PC case. The Seasonic hybrid fan control is always enabled to optimize the cooling according to necessity.

Let’s move on now and see what we can expect when a user purchases the FOCUS SGX-450 power supplies in retail in terms of documentation, accessories, cable count, rail layout, output characteristics, and general build quality.