I am looking to upgrade my gpu from an rx480 to a 1080 simply for higher resolution gaming 1440p/ 4K for example. After doing some research i am still unable to find what is classed as the "Number 1" 1080 card in 2017 (I would preferably rather not spend over 600 pounds nor am I looking for water cooling). Also I have a 600watt psu, on the Nvidia website it suggests a 500watt requirement, is there much difference to the founders edition compared to lets say the ASUS strix 1080 which is factory overclocked? Thanks. CPU: 6600k oc to 4.5