To run DCS, his system burn less then 450w.
Video card= 260w
CPU at 40% utilization= 80w
Mobo (90% utilization)= 70w
Stuff= 40w
His PSU is at 65% of the max. His PSU (650w max output, 780w peak output, 85% efficiency, high quality 105 °C Japanese capacitor) burn 80w of heat.
https://www.thermaltake.com/products-model_Specification.aspx?id=C_00003003