asrock rx 580

Tought about upgrading my GTX 950 (which works fine up to this day) and recently bought a RX 580 8Gb Asrock, but the rest of my build is ancient (will upgrade soon). My concern is if the new GPU will work fine or I'll have performance issues. My Rig: Windows 10 Pro x64 8Gb RAM DDR2 800Mhz Core...