hi my dad recently bought me a 1080 gigabte g1 im thinkn about getting a second one and sli them and buy a 4k monitor as i dnt wanna get rif the graphics card my dad bought me as id feel bad i have a beat of a machine at present but i wanna start testing gaming in 4k or watching videos in 4k can any1 help me on advise what to do im at a crossroads many thanks