So i took my pc to repair shop and they could not smell anything.
but at home when im playing Rust ,smell is so strong ,i get dizzy after a while.
I3 3220
RX 460
Evga 500b
500gb WD blue
6gb Ram
Weird smells are always going to be bad if they come from inside your case. I would try to isolate what might be causing it before you do much more with the machine