The output voltage ripple is far below the allowable maximum even at full load of 750W.
The cross-load diagram looks very good. The +5V voltage is worse than the others, but never leaves the allowable range at any loads, even greatly misbalanced ones.
There is a Silencer sticker on the case of the employed fan, but its rotor carries the original manufacturer’s sticker. So, it is an Adda AD0812UB-A71GL. Fans with the UB index are the fastest ones in this firm’s product line-up, and the noise characteristics of the PSU will depend on its fan speed regulation.
Fortunately, it’s all right here. The speed is not higher than 1500rpm at loads up to 500W – that’s not high for an 80mm fan. Then it grows up quickly together with the load, protecting the PSU from overheat. So, the Silencer 750 is very quiet at average loads. As for high loads, a system that can create such a load will not be quiet irrespective of the PSU.
The PSU is over 85% efficient, which is an excellent result. The efficiency is far above 80% across most of the load range. The power factor is over 0.95 as you can expect from a PSU with a properly implemented active PFC.
So, the Silencer 750 from PC Power & Cooling is an excellent PSU for people who really need a high-wattage power source. Besides superb electrical characteristics, a somewhat unusual appearance and a full selection of cables, it features a very quiet operation at low and medium loads, which is not a common attribute of high-wattage PSUs.
My single suggestion for the manufacturer is to use a more durable paint but retain its remarkable color :).