Our load tests utilize a couple of FAST ATE active load testers, and a variety of other equipment such as an oscilloscope, power conditioner, temperature probe, and a power consumption meter. You can read more about our standard testing approach here.
The tests performed are based around six conceivable setups that are out there, and progressively load down the PSU up to the power supply's limits, or 1000W; whichever comes first. Since our test equipment's limits are lower than that of the SilverStone ST75F-GS 750W power supply, we can test it to its maximum.
The above tests represent typical loads that we have measured from various systems, and are meant to give a rough idea of where your computer might fall in line with our tests. Please keep in mind that each system is different, and actual loads can vary greatly, even with similar hardware.
Let's start by taking a look at the voltages, to see how well this unit did during testing. Starting with the 12V rail, we see 3% regulation from start to finish, with a total drop of .22V. The 5V rail managed to stay within 2% of specification, with a total drop of .09V from start to finish. Moving towards the 3.3V rail, we see that regulation was within 2% of specification, with a total voltage drop of .09V.
DC Output quality for the SilverStone ST75F-GS was okay, and well within specifications. During Test One, we saw 21mV of noise on our scope at 22% load. When we increased the loads in Test Two, the ripple climbed to 29 mV at around 43% load. Increasing loads even further showed that the noise on the 12V rail climbed to 54mV at 750W.
The SilverStone ST75F-GS is rated for 80 PLUS Gold efficiency. This means that the power supply must perform at 87% / 90% / 87% efficiency, at 20% / 50% / 100% loads respectively. As you can see, the SilverStone ST75F-GS is performing exactly as would be expected to reach these levels of efficiency.
As I stated at the beginning of this review, SilverStone is almost like a household name to us. We look forward to seeing all of their products and what they have to offer, especially their power supplies. The big draw about the Strider Gold S series is that it intends to provide everything that we've come to expect out of SilverStone in a power supply, just in a smaller shell. Smaller is almost always better these days as it generally means lighter, cooler, and more compatible.
On paper, that is exactly what we get. A smaller power supply with the same qualities of their longer Strider Gold series. If we go back and compare it to the Strider Gold Evolution 850W, we can see the results just aren't quite the same. I'll break the performance down in three areas as always, but this time I'll reference the ST85F-G Evolution in comparison.
Voltage regulation is just as SilverStone claims. The 12V and 3.3V rails were both within 3% and the 5V rail was within 2% of ATX specifications for the ST75F-GS. This is just as SilverStone claims, but the ST85F-G Evolution had both the 5V and 3.3V rails within 1% and the 12V rail just barely pushed into the 2% area. It feels like we're taking a small step backwards, instead of a small one forward. The DC output quality is of the same boat. Both units start around 20mV with the ST75F-GS creeping up to a maximum of 54mV. The ST85F-G Evolution only showed a maximum of 45mV of noise, but yet, has 100W more power going out. Again, it feels like a small step back.
Finally, we have efficiency. Taking a look at the numbers, it is clear that the ST75F-GS is within the range of what is required for the 80 PLUS Gold certification, even though it is nearing the minimum limit towards the end. Again, if we look back at the ST85F-G Evolution, we see that it simply wasn't cutting things as close as could be and simply gave you something more.
I can't help but feel that the ST75F-GS rides on the success of the Strider Gold series name to drive sales. That doesn't mean that this is a bad unit because it most certainly is not. It just feels like it doesn't belong as a member of the Strider Gold series as that has been a true quality unit that has been trusted by many throughout the years.
Instead, this is more of an entry-level unit. That is clearly reflected by the short three-year warranty that SilverStone gives it and the $135 price tag that puts it right in the middle of the market with no clear way to differentiate it from the rest of the units on the market. That leaves the ST75F-GS as an average unit that gives you no real reason to purchase it other than it fits the budget and carries the SilverStone logo.
Product Summary Breakdown
|Quality including Design and Build||80%|
|Bundle and Packaging||85%|
|Value for Money||85%|
|Overall TweakTown Rating||84%|
The Bottom Line: While the ST75F-GS is a good entry-level unit, there is no compelling reason to recommend it over other options on the market. It fails to differentiate itself from the pack in price, features, and performance.
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