i have a 180w psu but i looked up my pc and it says my motherboard delivers 45 w my cpu is i3 4130 4gb ram i tried installing it in my system trough the pci slot the fan spins but it does'nt detect it so i tried installing w7 and i have put some drivers i found on the internet the drivers also did not detect the gpu maybe power from the motherboard is not enough it needs a 4 pin conector my psu does not have any for a gpu also this is my gpu https://www.gigabyte.com/Graphics-Card/GV-NX79G256DP-RH#ov