R9 380 power and psu

Hi

one of rig i am using for R9 380 4Gb and i am using 2 psu @850x corsair plus gold so 1 psu have 3 cards and other 1 psu one card and total amp taking 3.2 something so 3.2x220 = 704 watts so can i use just 1 psu with 4 cards?