PC Power & Cooling Silencer 750W Black PSU, 30% load

3.3V

5V

12V

PC Power & Cooling Silencer 750W Black PSU, 50% load

3.3V

5V

12V

PC Power & Cooling Silencer 750W Black PSU, 75% load

3.3V

5V

12V

PC Power & Cooling Silencer 750W Black PSU, 100% load

3.3V

5V

12V

PC Power & Cooling Silencer 750W Black PSU,
30-100% load voltage regulation test

3.3V

5V

12V

PC Power & Cooling Silencer 750W Black PSU, efficiency graph

The voltage regulation circuit deserves a mention. All of the lines are slightly lower than the standard rated voltage values, but very close to them at all times. This is not bad at all, neither will it affect the performance or reliability of your PC, but for psychological reasons everyone would agree that 12.02V looks better than 11.98V when talking about power. On the other hand, the voltage regulation circuit is extremely responsive and won’t allow the lines to fluctuate during large load changes. It gave us some of the smoothest voltage regulation graphs we ever had here in the DH labs.

As this unit is designed for maximum silence and has only an 80mm fan for cooling, it has to rely on high efficiency and its large heatsinks in order to stay cool. Remarkably, the unit is entirely silent below 50% load. Above 50% load up to its maximum power output, the unit is audible but by no means noisy. The efficiency of the 750W Silencer starts low but explodes after 40% load, easily staying above 80% for the entire power range of the unit. As not much power is wasted, less cooling is needed. The unit itself barely warms up inside its normal power range, even though the air pushed outside by its fan is getting considerably hot. This means that the cooling design of the unit is very efficient and the heatsinks are releasing the generated heat to the air quickly, before it makes the unit chassis and components hot.