SilverStone SFX SX600-G 600W Power Supply Review

With many people looking for a smaller enthusiast computer system footprint, the size of a power supply gets very important. With SFF motherboards getting better for overclocking, many folks are looking for higher PSU powers for overclocking. SilverStone brings an SFX form factor 600 watt capable pint-sized PSU.


SilverStoneTek is a company best known for its high quality cases but its product lines extend into other components such as cooling, power, fans, storage, and so on. As a company, Silverstone has built up 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, SFX, Nightjar, Gemini, and Zeus model lines that range from 300W to 1350W DC output. For this review, we are looking at SilverStone’s largest capacity SFX series power supply, the SX600-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 Thermaltake, as well as the occasional Enhance branded model.

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Big Things Come in Small Packages

Over the years, we have reviewed a large number of standard ATX/EPS power supplies. We have, however, reviewed just a few other form-factor power supplies like Auxiliary power supplies, TFX power supplies, redundant power supplies, and SFX power supplies. Today, SilverStone is back with another one of these slightly less common in the enthusiast realm form-factors with its SX600-G, which is a SFX form-factor unit. Previously, we have reviewed the ST45SF-G SFX power supply from SilverStone and that was a very nice unit. Today though, SilverStone has upped the ante as the SX600-G is 150W larger in capacity than the ST45SF-G. While 150 watts may not seem like such a huge leap when users think of monstrous 1500W ATX/EPS units, when you are talking about something as small as an SFX power supply you actually end up talking about a power density that is much greater than what you see from those big monster units. As such, it will be interesting to see how SilverStone and Enhance have managed such a large increase in capacity over their last offering. Before moving on, let's see what SilverStone has to say about this specialty item:

After releasing the breakthrough SFX power supply in 2012 with the ST45SF-G, SilverStone has pushed the technical envelope even further with yet another industry defining design in the SX600-G. This small form factor PSU has the exact same dimensions as its predecessor but its power density has increased from 567W per liter (in the ST45SF-G) to 756W per liter. The result is a standard-sized SFX PSU with an incredible 600W of continuous power, a level that is capable of supporting any single graphics card system with ease.

Besides the power increase, the SX600-G comes standard with flexible, flat modular cables similar to those in the PP05-E short cable kit for vastly improved cable management in smaller cases. It also has added semi-fanless capability that was first introduced to SFX PSUs by the ST30SF so its quiet running fan can remain turned off during ideal low load or idle conditions for complete silence. As before, an ATX adapter bracket is included to enable users to install this PSU into any small or even larger cases that do not have SFX mounting holes. For the most ardent SFF enthusiasts, the SX600-G is truly a dream come true that combines the convenience of SFX size and all the top of the line features one can expect from high-end ATX PSUs into one product.

Let’s move on and see what we can expect when a user purchases the SX600-G power supply at retail in terms of documentation, accessories, cable count, rail layout, output characteristics, and general build quality.