Win7 ulti or lite sa Dota 2 <- (Not sure on this, LoL nalang kasi nilalaro ko ngayon), but hindi na supported ang Win7~9 sa Valorant Win10 pataas lang.
Kaya i suggest Win10 lite or any variant na lightweight.
Goods din yan atlas kaso for pure gamer lng yan madami ksi na disable na services dyan like if hindi ka gumagamit ng ms office and other related to work magkaka problem ka mas preferred ko yng revios for compatibility use