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Check out our PSUs 101 article to learn more about PSU protection features.
Our protection features evaluation methodology is described in detail here.
|OCP||12V: ✗ 5V: 27.4A (137%) 3.3V: 25.8A (129%) 5VSB: 5.3A (207%)|
|OTP||✓ (135°C @ secondary side)|
|SCP||12V: ✓ 5V: ✓ 3.3V: ✓ 5VSB: ✓ -12V: ✓|
|PWR_OK||Operates properly (but less than 1ms delay time)|
|SIP||Surge: MOV Inrush: NTC thermistor|
Over-current protection on the minor rails is set at normal levels, given our experience so far. Conversely, it's quite high at 5VSB, though we didn't encounter over-limit ripple or out-of-spec load regulation.
SilverStone seems to be quite confident in this small PSU, since it has set OPP at 151%. In our opinion, a value closer to 125% would be more suitable.
Moreover, there is OTP, which is well configured, and all rails are protected against short circuit.
Although the power-good signal is accurate, it isn't at least 1ms away from the actual hold-up time, as the ATX spec dictates. Beyond that, the small NTC thermistor doesn't do a very good job of limiting inrush currents.
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Aris Mpitziopoulos is a Contributing Editor at Tom's Hardware US, covering PSUs.