The SilverStone Strider Platinum ST1200-PTS 1200W PSU Review: Small in Size, Big on Complianceby E. Fylladitakis on October 11, 2019 9:15 AM EST
Cold Test Results
For the testing of PSUs, we are using high precision electronic loads with a maximum power draw of 2700 Watts, a Rigol DS5042M 40 MHz oscilloscope, an Extech 380803 power analyzer, two high precision UNI-T UT-325 digital thermometers, an Extech HD600 SPL meter, a self-designed hotbox and various other bits and parts. For a thorough explanation of our testing methodology and more details on our equipment, please refer to our How We Test PSUs - 2014 Pipeline post.
The energy conversion efficiency of the SilverStone ST1200-PTS at room temperature is just sufficient enough to justify the unit’s 80Plus efficiency certification. It meets the 80Plus Platinum certification requirements for an input voltage of 115 VAC, reaching up to 92.1% efficiency at 50% load and holding an average nominal load (20%-100%) efficiency of 90.7%. In our testing the PSU cannot meet the 80Plus Platinum efficiency certification requirements for an input voltage of 230 VAC, failing to reach 94% efficiency at 50% load, yet the average nominal load (20%-100%) efficiency of 91.6% is good.
The thermal control circuitry of the SilverStone ST1200-PTS is simple, meaning that there is no “fanless mode” or some other advanced control method, with the circuitry simply controlling the speed of the cooling fan depending on the temperature and load of the PSU. We found the control algorithm a little peculiar, as it holds the speed of the fan at very low levels while the load is lower than 450 Watts but then increases the speed of the fan almost exponentially, reaching its maximum speed within a range of just a few hundred Watts. This effectively makes the ST1200-PTS very quiet at loads below 450 Watts and very loud at loads above 650 Watts.