If I play games like ARK, minecraft etc etc on a 42 inch tv can?

well I play games like ARK:Survival Elvolved - World of Warcraft - Skyrim etc etc and they're good games that come with amazing graphics and my computer is suppose to play them on medum-high graphics but can only play them on low because i get bad fps, is this because i play on a 42 inch tv? If i got a less big screen would i be able to play them on better graphics?

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