I misplaced the power cable for my PSU and need to get a new one. It's an XFX PRO650W XXX Series Semi-Modular. The input current @ 100-240 VAC is 9-4.5 amps. What do I need to look for in a replacement. I've found a 5a and a 13a IEC cable on Amazon. I don't know which to get any help is greatly appreciated