yes it's my psu. it's from hp xw4300. before i bay can run this card on this psu without heavy load?Is this your PSU model, or some other brand ? But anyways, try to get some other decent quality PSU for the RX 470, if possible.
https://microdream.co.uk/delta-elec...1-atx-460w-psu-power-supply.html#.XRyCkegzaUk