The FSP Hydro G Pro 1000W ATX 3.0 PSU Review: Solid and Affordable ATX 3.0by E. Fylladitakis on January 19, 2023 8:00 AM EST
Cold Test Results (~22°C Ambient)
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, as well as our addendum on ATX 3.0/12VHPWR testing.
The FSP Hydro G Pro 1000W manages to reach efficiency levels that would grant it an 80Plus Gold certification regardless of the input voltage. This is rare, as most manufacturers aim to meet the certification requirements with an input voltage of 115 VAC, where the required efficiency figures are lower. It has an average nominal load range (20% to 100% of the unit's capacity) efficiency of 91.8% when powered from a 230 VAC source, which drops down to 89.3% when powered from a 115 VAC source. The efficiency gap between the two input sources is quite high, suggesting that the design has been optimized for an 230 VAC input. Nevertheless, this design has very good low and high load efficiency, which also suggests that minor tweaks could easily have it reaching 80Plus Platinum levels with an 115 VAC input voltage.
We ran our tests with the Eco mode disabled, meaning that the fan began spinning instantly when the PSU was powered on. The fan runs at very low RPM while the load is up to 400 Watts, which also is most of the range that the Hydro G Pro could operate without relying on its fan at all (enabling the Eco mode will keep the fan from spinning until the load reaches 300 Watts). However, when the load is greater than 450 Watts, the speed of the fan keeps increasing alongside with the load, reaching figures above 50 dB(A) while the PSU is operating at maximum capacity. The internal temperature of the PSU remained very low at all times, suggesting that the designer favored reliability over acoustics.