Notwithstanding the lack of dedicated voltage regulation, this PSU did very well in the cross-load test. None of the output voltages deflects more than 3% from the nominal value in the typical load range of a modern PC (from 20 to 50W along the Y-axis and all the way along the X-axis). The +12V rail will sag to about 11.75W under high loads in real PCs.
The voltage regulation qualities of the senior model are the same. It yields the same voltages as the junior model under identical loads.
Output Voltage Ripple
The output voltage ripple is far below the permissible limits (marked to the right of the oscillogram) even at the maximum 450W load.
The output voltage ripple of the 500W model is stronger, but far from critical, either.
Fan Speed Control
Both models are cooled with 120x120x25mm fans (Yate Loon D12SH-12).
At loads below 300W the fan speed is somewhat higher than 1100rpm. At higher loads it is growing up in a linear manner.
The senior model draws an identical graph.
Thus, Ikonik’s Gaia are average in terms of noisiness. Many buyers will find them quiet but you won’t be satisfied if you want silence. For comparison, power supplies recognized as silent have a fan speed of 800rpm or even lower at low loads.
On the other hand, the Gaia PSUs behave like typical PSUs manufactured by Channel Well. CWT engineers seem to prefer to make sturdy and reliable products that are guaranteed to have no cooling-related problems and are satisfactory in terms of noisiness for most users. Silent PSUs are not their goal. And I can find nothing wrong about this approach.