The Radeon RX 470 requires 120W or minimum 450w power supply. The stock power supply YK6KW for the Vostro 460 is only rated at 350W continuous. You may be better off with an nVidia GTX 750 TI which is just my opinion.
Thanks ManyDimensions I was planning to upgrade to a 600W PSU. I read somewhere that someone had problems with using this video card on a vostro 460 i7 series desktop.