What do the R9 300-Series actually consume in terms of wattage, here you go - AMD Radeon R9 390X, R9 380 And R7 370 Power consumption stress tests. : r/pcmasterrace
各社、Radeon 300シリーズ搭載カードを発売 ~R9 390XからR7 360までフルラインナップ - PC Watch
VisionTek announces Radeon R9 Fury X and Radeon 300 series | VideoCardz.com
GIGABYTE Announces its Radeon R9 300 and R7 300 Series | TechPowerUp