I have Sapphire R9 380 4GB Nitro card.
My problem is, GPU core 50° IDLE, full load 83°.
To high IDLE temperature.
It works passive this celsius, fan starts around 55°.
I have mid case, 2x12cm fan front, 1x12cm fan back.
Try change vga paste ?
If something is wrong with the thermal paste on a new card, you should return it. It also may be a defective cooler, not thermal paste. I had the same temperatures on a Sapphire R9 380 Nitro and decided to return it.
The thermal paste is ok.
If i set the vga fans manual, idle 40° (~38% fan speed) , load 67-70° (~68% fan speed)
Something wrong with the fan controller. Set 30% and don't move, 35-36% starts running (~400rpm)
Maybe wait a new BIOS.
They call it Intelligent Fan Control, so it works as it should. And 50C is a safe temperature.
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