moddern games

i thought about going with dual gtx 550 ti in sli, but does fortnite and minecraft like sli, i know some games dosent like sli so i would not do it if it didnt, pc specs processor: i7 3770k 4.467 ghz, ram: 10 gb noname brand, gpu: one 550 ti, cooling be quiet pure rock slim, case, pre-build...