Monero mining is suitable for CPU's so the GPU's are not that superior mining it.
You can earn 30-40$ a month with 5 years old 2 thread Intel i3 or AMD FX or up to 200$ mining with new PC with Intel i7/Ryzen and some solid nVidia or ATI GPU.
XMR-stak combined CPU+GPU miner with added "Microsoft Distro C++ 2015" missing DLL's
