Somebody sold you an old workstation.
You need a high end graphics card, NVIDIA like, and all the ram that that MB can hold, and a 650w PS to feed it. Active cooling would be good too.
My oldest son is into building gaming systems. The last one he built looks like a mini-fridge, it’s that big. Most of the space is used for the cooling system.
The cooling system is prolly because he is overclocking. There are fine systems already out there sufficient to game w/o spending big bucks, and w/o overclocking.