you need to look at graphics score not overall score, The motherboard, CPU and RAM all play part in the score as well. Even the graphics score. I found my 2 x r9 290 performed better switching from z77 to z170 board but I did go to a I7 over my old I5. I am talking purely graphics score and FPS not physics as you would expect it to be higher with a better CPU and RAM.
The guy could be running a I7 extreme and have 10 cores and 20 threads so a 4core 8 thread CPU will have no way of competing with it haha. As I say more go off the graphics score but this is not a solid bit of info as it still is affected by all the other hardware slightly as well .