GA 990FXA-UD3 R5

Hello, I have an XFX R9 390 and an FX 9590 on the Gigabyte 990FXA-UD3 MB with a single 8GB Patriot Viper 3 1866MHz Ram and am wondering if a 750w Gold+ PSU strong enough for a 5+GHz OC on the CPU? If not, what would you recommend? (money is an object so keep that in mind). I'm currently using an...