My computer:
CPU: I7 4790 base clock of 3.6 Ghz
Motherboard: Acer Predator G3-605
RAM: 8 GB 1300 Mhz
Current GPU: r9 255 will switch it out for the R9 380
Power Suply: 500 Watt
List the brand and model of your power supply. If it's a cheap model the answer is already, no. You need a high quality 500-550 watt power supply. If you'll be overclocking you should shoot for 600-650 watts.