I'll be running an i5 4460 and rx 480. Will an evga 500b be enough? Or should I go 600b? Or maybe even 650 modular gold?
If your not sure, then go higher... No Harm comes from going high, but going low can be disastrous. I havnt seen proper reviews on the 480 yet to see what power use is like, and assume a 550-600w is OK, but a 650w is obviously a safer bet. Just don't cheap out on a junk unit
Any 550W should suffice any single CPU & GPU core build
This forum post should help as well to narrow down your searches
Wrong. This card maybe, but to say any is flat out wrong.
I would say most builds, not really including overclocking, or power-hungry CPUs.
A 6600K/6700K (or even worse yet, an FX processor), and a 390/X or similar might get a little bit tight on 550W. If we're looking at a locked chip, that statement is probably correct.
Why I mentioned single GPU CORE, not dual GPU CARD. Big difference
I would never cite youtube as a source, but he is right; as long as your +12V can supply enough amperage, youre usually good go to go, and most GPUs wont require above a 500W PSU.
For the most part nowadays it depends more on the amperage the 12v rail can supply and the quality of the unit over rated wattage.
I don't think that's a power supply.