Tonga Pro GPU is power-efficient, with a 190W TDP. For comparison the R9 270X has a 180W TDP, the R9 280 has 200W TDP and the R9 280X has 250W TDP.

Our TurboDuo R9 285 card consumed less juice than the R9 270, but we cannot say whether this is attributed to PoweColor’s power management or the GPU itself. Like we said, we just got a weird piece of silicon – it consumed less than expected, but it generated a bit more heat.

Overclocking increased the consumption by 20W.