If you've read the article discussion on this mini-PSU, you might know I ordered two. Well I got them today.....took 14 days. But they're here, and the first one I hooked up works normal.
This is a bench test right now, using a setup that draws 44W at an idle with the Sparkle. And it maxes about 102W during stressing. Well....when I started it up and let it idle for 1/2 hr, the fan never started. Then I played some videos, which raised the current draw to about 50W.....still no fan. The case was still fairly cool.
Well I wanted to hear the fan....raised the current draw to 90W. After a minute or so, the fan came on, apparently at some high voltage, because of the sound. It was not too bad.....definitely a ball-bearing fan. I then dropped back to an idle, and the fan slowed down to almost inaudible, but never turned off after that. (Now I haven't run this setup for very long, so the fan might have turned off at a idle, if it ran longer).
This is a 15mm fan, ball bearing. The two Scythe fans in the photo are 20mm and 10mm.....both sleeve bearing, both quieter than the Sparkle fan. Where I go from here with this PSU.....we'll see. If the Sparkle fan runs slow most of the time, I don't see any need to replace it. I've been considering making a new case top for it, out of perforated aluminum.....maybe installing a 60 or 70mm fan blowing inward from the top, and exhausting from both ends. This PSU runs cool at an idle....barely 35C at the output vent.......ambient of 23C.
I think this PSU will work out for me....it's small, and runs quiet and cool.