I noticed that almost all power supply units (PSU) nowadays come with an 80plus label. This means that over 80 % of the electricity I pay for in my bills will actually reach my hardware instead of being wasted in heat, and that my hard work saving on the decimals of Watt there will make sense. Great, but now how do I choose if I want a PSU for a computer which is not too power hungry?
Specific technical question: what's the most efficient PSU in a non-custom form factor, at a consumption of 100 W or 200 W, for an EU 230 V or 115 V home?
Hypothetical concrete question with probably too much detail (skip if you understood above): what's the most efficient PSU I can use for my new mini PC/slim PC/HTPC/whatever, AMD APU based, either
- chipset A88X, processor A8 or A10 family (Kaveri), socket FM2+, motherboard mini-ITX or micro-ATX (mATX);
- or socket AM1, Athlon 5350 (Kabini), motherboard mini-ITX;
- or socket FT3b (Beema, Mullins), anything;
- or socket FP4 mini-ITX motherboard for Carrizo or Carrizo-L, anything available (nothing for sale right now or in foreseeable future AFAIK)?