I have a Dell I3650 and I want to upgrade the power supply but I dont know what power supplies can fit in the case can someone tell me if there is like a 400w or 500w power supply that can fit in the case?
There is no guarantee that a standard PSU will fit into your case, and plug into the motherboard. Dell is very, very proprietary, and I can tell you that my Dell XPS8920 does not use an industry standard power supply. You are probably out of luck.