SilverStone SFX ST45SF-G 450W Power Supply Review

Silverstone is one of our favorite computer power supply builders as the company has a tremendous track record when it comes to high quality and quiet power for our desktop systems. Today we look at something a bit different in terms of scale, a PSU pushing 450 watts of power in a package half the size with its sights on the SFF market.


SilverStone Technology Company (SilverStoneTek) is a company best known for its high quality PSUs (that we happen to love), but its product lines extend into other components such as cooling, cases, fans, storage, and so on. As a company, Silverstone has built this impressive product repertoire in a very short time having been founded in 2003. Today, however, we are interested in its power supplies which are comprised of the Strider, Element, Nightjar, Gemini, and SFX model lines that range from 350W to 1500W DC output. In particular, we are looking at one of SilverStone’s SFX series of power supplies, the ST45SF-G, which is produced in conjunction with Enhance.

Enhance Electronics Co. Ltd. was founded over 20 years ago in 1986. While a major power supply OEM Enhance is not nearly as well known to most users as some other OEMs as its core business focus has been outside of the desktop market in areas such as servers, embedded, and telecom markets. However, its products have started to surface in the US consumer realm in the last year or so under the likes of SilverStone, Silverpower, Antec, Cooler Master, and now Thermaltake, as well as the occasional Enhance branded model.

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Do Good Things Come in Small Packages?

Previously, we have reviewed 8 power supplies from SilverStone and the only products among those that are close to this unit in capacity have been the Nightjar ST50NF and the Strider ST400. However, while each of those units was unique in various ways, neither was a SFX form factor unit like the one we are looking at today. Indeed, we have seen very few non-ATX form factor power supplies over the years. Given that this unit differs somewhat from the standard enthusiast market, it will be an interesting look for us today. Before moving on, it will also be interesting to see how SilverStone plans to position this product as it is certainly something of a specialty item:

After successfully expanding and leading SFF (small form factor) cases and SFX PSU into the DIY (do it yourself) market, SilverStone engineers have continued their push for advancement in these categories by releasing a true upgrade-worthy small form factor power supply, the ST45SF-G. Despite being half the size of a regular ATX power supply, the ST45SF-G can still produce continuous power output of 450W. Its 80 PLUS Gold level efficiency is a great leap from the previous SFX best of 80 PLUS Bronze and the full modular cables is also the first of its kind for this form factor. To enable users to easily take advantage of this excellent SFX power supply, an adapter is included to convert ST45SF-G to mount in any ATX case in addition to ones that fit only SFX. For SFF users and for SilverStone, the ST45SF-G is more than just an upgrade, it is an important milestone for DIY desktop computer.

Let’s move on and see what we can expect when a user purchases the ST45SF-G power supply at retail in terms of documentation, accessories, cable count, rail layout, output characteristics, and general build quality.