Chugalug_ :
As I said, GPUs are a different deal, processor bottlenecks are a huge problem, you'll just get stuttering like no tomorrow.
No use investing into an old platform with mediocre performance.
Let @OP decide, I think enough has been given.
My old i7 870 had zero issues playing, but one has to be realistic with the settings, even in the I7 7700K machine the RX 480 won't come close to what the GTX 1080 can do.
Now I wouldn't get a 1st Gen i7 machine today, no way.
I wouldn't get anything below 4th Gen i7.
Was just saying they do perform, but not even close to the newer hardware overall, but that's a given.
With a GTX 1080 or GTX 1080Ti I can see some CPU's could hold them back.
But from the GTX 1070 and below not so much, the bottlenecking thing has been overblown by the YT people like most things seem to be. They tend to make things look worse than they really are on purpose from what I have seen and from my own testing.
I have seen it so bad that some have overclocked the heck out of the new hardware and ran the older hardware at STOCK speeds to exaggerate the performance of the newer hardware. I have seen this so many times it's gotten to the point I don't even watch a lot of them anymore. It's getting as bad as reality TV, and we all know what reality TV is.