What GPU should I get?

I soon realised that although I’ve never actually seen one over here (never been interested in office PCs), their laptops are popular though, even my wife has a thinkpad for home office. I know you won’t get much for your desktop so if there’s anything worth salvaging then why not use it. For example my old gaming tower may look rubbish but as both side panels are removable I thought it just perfect for the mesh conversion that I use now and am extremely happy with. I even have a couple of rescued laptop drives in raid0 that i use just for photo’s and music and one of their screens for the occasional pop out panel. I don’t compromise on the actual system though, too much mixing and matching and you’ll only lose performance.