SilverStone ST75F-PT 750W Power Supply Review

SilverStone is a long time favorite of many HardOCP readers and editors. We have more than a few in service in the Underground Bunker. Today SilverStone serves up a 750 watt PSU that puts it in the middle of the most competitive PSU enthusiast segment there is.


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 1500W DC output. For this review, we are looking at SilverStone’s recent revision to the Strider line, the ST75F-PT, which is produced in conjunction with Sirfa/High Power.

Sirfa Electronics Co., Ltd. is a name that is not that familiar to most users but Sirfa has been around since 1996 when Sirtec established Sirfa as a factory in the Sirtec group on mainland China. In June 2008, Sirtec sold off its interest in Sirfa making the company independent of the Sirtec brand but still in business with High Power. As such, while we have not seen any Sirfa produced power supplies under the Sirfa brand, some of the Sirtec units of the past were produced at the Sirfa facility. Additionally, we have seen Sirfa providing OEM services for Thermaltake, Enermax, PC Power & Cooling, Tuniq, Lepa, SilverStone, and others with very mixed results; sometimes good, sometimes bad.

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A Wee Bit More Platinum

As we mentioned when we reviewed the ST55F-PT, a common theme among SilverStone power supplies of late has been a reduction in length of the ATX12v specification power supplies that they have been producing enabling their usage in ever smaller builds. While this change is certainly welcome for a certain niche of users, it is important that performance not be sacrificed to a great extent in the process. As it turned out with the ST55F-PT, SilverStone produced a product that was indeed still competitive even in its reduced form factor. However, today, we are looking at the ST75F-PT which is 200W greater in capacity yet still shares the same dimensions as the previous ST55F-PT. So, while SilverStone may have been able to pull off a competitive 550W unit, today this task is somewhat more challenging. And, just because this unit may be a smaller form factor and advertised heavily as such doesn't mean it gets a pass if it falls short in other areas in our evaluations. Therefore, as always, the emphasis today is going to be on how this unit performs in our metrics not primarily on how small it is. Now, before moving on, let's see what SilverStone has to say about this particular power supply:

As desktop computers continue to advance toward ever more efficient and smaller designs, SilverStone is helping to drive the efficiency movement by releasing the Strider Platinum series of power supplies. Created to be the smallest fully modular ATX power supplies with 80 PLUS Platinum efficiency, they are also incredibly quiet with the ability to run in fanless mode. If the loading condition is below 20%, the fan in the power supply can remain off for silent operation during idle or low powered computing activities. Other great features inherited from previous Strider series include آ±3% regulation, powerful single +12V rail, 24/7 continuous power output, and multiple PCI-E cables. For those looking to build highly efficient systems in small footprints, the Strider Platinum is definitely the best choice.

Perhaps unsurprisingly, this is exactly what SilverStone had to say about the ST55F-PT when we reviewed that unit a little while ago. So, with that preview of what SilverStone expects from the ST75F-PT out of the way, let’s move on and see what we can expect when a user purchases the ST75F-PT power supply at retail in terms of documentation, accessories, cable count, rail layout, output characteristics, and general build quality.