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I just bought the mac book pro with the AMD Radeon R9 M370X. Unfortunately rendering is quite slow. I've read in different forums that i need to switch to GPU in user preferences -> system and change to GPU computing on the right hand side of the screen. I did it but the rendering process is still slower than rendering with just cpu. Can sb tell me what i am doing wrong? Thanks a lot!! Marc

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  • $\begingroup$ Something is still not right with Cycles bakes on AMD Radeon R9 M370X. The Macbook Pro (Mid 15) is freezing and just a hard reset will work, even updated to MacOS Sierra. That Bug is known since Month and it seems that no one cares at all. $\endgroup$
    – Symen
    Oct 14, 2016 at 14:10
  • $\begingroup$ @Symen Have you checked to see if this bug has been reported yet? If no, and this still occurs in the latest development version, you might consider submitting a report yourself. $\endgroup$
    – gandalf3
    Oct 14, 2016 at 19:13

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With GPU rendering it's usually best to increase the tile size to about 256x256. That way you're not going to-and-from CPU and GPU memory so much.

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there seems to be a big difference between nvidia graphic cards and amd graphic cards. Until recently Gpu rendering was only possible using the nvidia cards with cuda cores. Starting with blender 2.75 / 2.76 it should also be possible with OpenGL amd cards. But with restrictions, I believe. Being an apple fan myself it is still a bit of a mystery for me too with is exactly the status of blender Gpu rendering on Mac / amd hardware. It is my understanding that fast Gpu rendering is still a nvidia / Windows privilege

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    $\begingroup$ Fast GPU rendering is not an "nvidia / Windows privilege." It works just as well on Nvidia / Linux. I know it's easy to forget about us Linux users, but we do exist! :) $\endgroup$ Feb 14, 2016 at 1:56
  • $\begingroup$ Most Blender developers work on Linux. Don't worry, we certainly won't forget about Linux users! $\endgroup$
    – dr. Sybren
    Oct 14, 2016 at 17:59

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