Gpu for hp m01-f1024

[roseydart]

I have a hp m01-f1024 it has an AMD 4700g 8 gig ram my kids like to play games and want to on PC but they can really play it. On the lower settings otherwise lagging I want to put the max 32 gig ram in it and what GPU can I get that will work with it so they can play it in 4k without lag or any recommendations at all. Thanks