Small green computer appears to be a branded version of the ebay ones that sell cheaper and have the same case and cosmetics.
I have 4 of the Farad (not cheap) supercap based LPSs for my DAC and upscaler. they are excellent. they run cool. I've had and gotten rid of other Supercap based LPS that ran hot to the touch which greatly reduces longevity and reiability.
I have 2 of the cheap Chinese ebay LPS powering my ROCK (just a NUC) and my Etherregen switch. The ether-regen has a lot of features to eiminate noise and did pretty well with the switching power supply but it seems better and cooler with the Ebay LPS. Both the ebay LPSs are not supercap based and run cool.
I say power supply over the pruifier.