When the PSU was working in pair with an APC SmartUPS SC 620, the UPS’ overload indicator would wake up at a load of over 315W. Switching to the batteries was performed without problems.

There’s very low ripple on the PSU output. Its amplitude is smaller than 15 millivolts on the +5V rail (50 millivolts is the acceptable maximum), and there’s almost no ripple at all on the +12V.

The PSU’s cross-load diagram looks good. This unit is operable in the entire range of declared loads, including high load on the +5V and +3.3V rails. When working in that mode, the voltages deflect quite far from the nominal values, but exceed the allowable limits only in the critical case when there’s almost no load at all on the +12V rail. In that part of the diagram which corresponds to the typical power consumption of modern computers, all the three voltages are in a green zone.

The PSU uses a Young Lin Tech DFS122512H fan. The manufacturer declares a fan speed from 700 to 1800rpm depending on the temperature inside the PSU (the temperature thresholds are not specified).

In my tests, the fan speed was 910rpm at a load of 50W and an ambient temperature of 22°C (the PSU was just lying on a desk). This is a good, but not record-breaking, performance. At max load the fan speed grew only to 1800rpm, rising linearly from a load of 150W. So, this power supply should be considered very quiet.

After you turn the computer off, the fan is rotating for a while at a low speed, powered from the standby +5V source. This helps quickly cool the PSU when its work is over.

Alas, the efficiency of the Hiper is low. It’s only 75% at the maximum, which is a very modest result today when all the manufacturers are boasting they have hit the 80% mark. I had even suspected some problem with our testbed, but it produced the same number after calibration. Looking up in the PSU manual I found its specified efficiency, only 76%. So that’s indeed how efficient this PSU is.

To all appearances, Hiper prefers to base its new products on older ones without bringing too many changes into them. This supposition is confirmed by the position of the active PFC on a separate card (most other manufacturers have long moved it to the main PSU card) and by its very moderate efficiency. On the other hand, apart from that low efficiency, the Hiper Type M 530W doesn’t have serious defects. It yields low-ripple and stable voltages and has a quiet fan.