While you ask about two different Forza Horizon games in your question and text, the news isn't good on either end: the GT 710 is well below the minimum requirements. You might be able to physically launch the game, especially Forza Horizon 3 as the older game, but I don't believe it will be a playable experience, at least a pleasant one.
The CPU is right on the edge -- it's missing two cores the other Sandy Bridge i5s have -- of being useful.
The GPU is the larger problem as it's basically an office GPU. It's only really a GPU for gaming if you're playing things released in 2005.