looks like AMD makes a better 580 than nvidia by far

nvidia and amd follow completely different naming schemes. The AMD RX 580 came out in 2017 and is roughly equivalent in power to nvidia's contemporary GTX 1060. nvidia's GTX 580 came out at the end of 2010 and its AMD competitor at the time was the Radeon HD 6970 which had a similar price point and very similar performance

AMD and nvidia seem to have always been pretty neck-and-neck in terms of GPU performance, with the deciding difference often being that AMD's drivers are often less stable and prone to crashing

which is a shame because AMD is absolutely the best big tech company out there right now morals-wise. fortunately they're currently also beating the hell out of Intel in every regard except mobile processors and something about memory controllers? though still trailing behind nvidia gpu-wise

@Felthry When I buy a GPU [in... several years], I am definitely going AMD.

[A significant part of that is they have /way/ better Linux support too!]