So, I made a better build on pcpartpicker, and I was searching if I can run win 7 64bit. I know that the data width of the CPU should be 64bit, and it is. But I don't know if the GPU is capable of that. See for yourselves and help if you can.
https://pcpartpicker.com/list/NqCfnH
https://pcpartpicker.com/list/NqCfnH