will a 600W PSU be enough for a Kaby Lake rig running 2 x RX480 (Sapphire Nitro 8GB)?
A Kaby Lake CPU has a TDP between 4.5W and 91W, so not much information in here.
But never mind, for 2x480 a 600W PSU should be a good choice. Not very high costs, proper reserves and good load point for high efficiency during normal operation.
Happy mining!