Silverstone Sugo SG05 and SG06: Gaming mini-ITX cases?

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The FSP power supply was tested only within the context of the case and not on its own. Specifications from the PSU label are provided, along with a few in-system measurements. Silverstone states that this PSU has been customized in the following ways:

  • Lower acoustics across all loading conditions
  • SilverStone specific cable types and length
  • 6-pin +12V connectors to support medium performance graphics cards

A copy of the efficiency test report is available at 80 Plus. It just squeaks by the 80% mark at 75W (20% load) and 300W.

Silverstone SG05/06 Power Supply Specifications
Input 90 ~ 264 VAC, 4.5~2.5A, 50/60Hz

+3.3V: 20A
+5V: 22A
+12V1: 14A
+12V2: 16A
+5Vsb: 2.5A
-12V: 0.5A
Maximum +3.3V & +5V: 125W
Maximum 12V1 & 12V2: 22A

Efficiency More than 80% average efficiency at 20%, 50%, and 100% load at 115/230 VAC
Cooling Internal 8 cm fan
Protection Over Voltage, Over Current, Short Circuit
Temperature Operating range: 0 to +50° C

Silverstone SG05/06 Test System
AC Power Measurements
Config 1
Config 2


Max load
* When the maximum GPU/CPU load was first applied, the AC power was 224W. As the system heated up, the power consumption gradually increased; this is the effect of heat on power efficiency. 229W was seen some 30 minutes into the test when all the temperatures had remained unchanged for over 5 minutes.

The power supply gave a good account of itself, delivering over 180W DC to the components in the gaming configuration with only a subjectively modest increase in noise. The fact that the GTS250 video card fan was screaming like a banshee obscured just how much more noise it produced, however. We expect it was not quiet, but it was much quieter than the video card. Based on past experience with FSP power supplies, we'd suggest keeping the total system power demand to under 120~150W AC to prevent the PSU fan from being an audible annoyance. The exact power level will vary with external factors such as ambient temperature; hotter means louder at a lower load.

At the high load with the modest system configuration 1, the power supply fan developed a bit of a tonal increase in noise, not really measurable in SPL but audible nonetheless. The increased fan speed was probably in the order of only a couple hundred rpm. At greater than 1m distance, probably not significant, but if you're seated right next to the box, it's audible.

No buzzing or squealing was noted when the unit was turned off (PSU in standby), but as noted previously, some of these sonic effects could be heard from very close up when the system was working.

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