Tomorrow I'll get a GIGABYTE Radeon RX 460 WindForce OC 2GB DDR5 128-bit and I'm not sure if it would work with a NO NAME 450 or 500W power supply(I got it when I bought my case) which I have been using for the last 5-6 years.
I had no problem with it so far (currently feeding a GIGABYTE GT 630...