aiv

My wish is to use internal mac gpu for internal 5k display and external 980ti for external monitor, which is Full HD only.

There is still an issue with imac 5k: when you use automate-eGPU.sh as is, in order to connect external monitor to the gpu. Your internal screen looses the original 5k resolution. Is it possible to accelerate the external screen only?

I had that noise with "SilverStone SST-SX500-LG", replaced it by "EVGA 650W Supernova 650GS Modular (80+Gold)" and now its silent with overclocked 980 ti.

In any case @goalque is the only one, who makes possible to use native 5k screen for CUDA rendering with egpu!

Is there any chance to monitor GPU sensors like temperature or thunderbolt data throughput?

Another question concerning PSU: I notice, that Akitio's blue LED goes down when I send my iMac into sleep mode. How can I tell the PSU to go down as well and to wake up when iMac wakes up?

I've found a scenario: monitor brightness can't be adjusted when in "Gaphics Drivers" icon the option "NVIDIA Web Driver" is set. "OS X Default Graphics Driver" allows the brightness adjustment, but then CUDA is not available..

By the way, will I get a double bandwidth when I plug the second thunderbolt port from iMac to Akitio?

The only remaining issue is the missing brightness slider in monitor settings. F1, F2 do not work either. I do not remember exactly, but after uninstalling the script the slider reappeared sporadically and I was able to adjust the monitor brightness but sometimes after the restart it disappeared again..

not at all! Works as it should be

Its working, I can render by CUDA engine, imac still has 5k resolution. Thank you so much!

The max availble resolution in SwitchResX is 4k, after uninstalling the script 5k again. I'll check system_profiler this evening. And yes, please please provide this option.

well @chrise is exactly in the same situation, his internal screen is downscaled to 4k. Actually I do not wont accelerate any games, just use the CUDA computing power for rendering.

There is one problem: I'm not able to set the native 5k resolution in my iMac - the maximum available option is 4k. Even when I unplug the egpu, set in Graphics Drivers menu the option  "OS X Default Graphics Driver" and restart the system. How can I fix that?

I had to install the cuda driver as described here http://blender.stackexchange.com/questions/7485/enabling-gpu-rendering-for-cycles

I took this one http://www.nvidia.com/object/macosx-cuda-7.5.25-driver.html and now its working!

I've tried to setup a new "MSI GTX 970 GAMING 4G". The installation seems to be ok:

installer: Package name is NVIDIA Web Driver 346.03.05f01
installer: Installing at base path /
installer: The install was successful.
installer: The install requires restarting now.
Checking IOPCITunnelCompatible keys...

Missing IOPCITunnelCompatible keys.
IOPCITunnelCompatible mods done.
Add: ":IOKitPersonalities:AppleGraphicsDevicePolicy:ConfigMap:Mac-42FD25EABCABB274" Entry Already Exists
Board-id added.
All ready. Please restart the Mac.

-clpeak went wrong:

$ sudo ./automate-eGPU.sh -clpeak
Downloading cl.hpp

  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0Warning: Failed to create the file 
Warning: /System/Library/Frameworks/OpenCL.framework/Headers/cl.hpp: No such 
Warning: file or directory
curl: (23) Failed writing body (0 != 16384)
-- Setting build type to Release
-- Selected OpenCL includes from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/System/Library/Frameworks/OpenCL.framework
-- Selected OpenCL lib /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/System/Library/Frameworks/OpenCL.framework
-- Configuring done
-- Generating done
-- Build files have been written to: /Library/Application Support/Automate-eGPU/clpeak
[  8%] Building CXX object CMakeFiles/clpeak.dir/src/common.cpp.o
In file included from /tmp/clpeak-master/src/common.cpp:1:
/tmp/clpeak-master/src/include/common.h:5:14: fatal error: 'OpenCL/cl.hpp' file not found
    #include <OpenCL/cl.hpp>
             ^
1 error generated.
make[2]: *** [CMakeFiles/clpeak.dir/src/common.cpp.o] Error 1
make[1]: *** [CMakeFiles/clpeak.dir/all] Error 2
make: *** [all] Error 2
./automate-eGPU.sh: line 1053: /Library/Application Support/Automate-eGPU/clpeak/clpeak: No such file or directory

and when I try to render in Blender I get this:

$ ./blender.app/Contents/MacOS/blender 
ndof: 3Dx driver not found
Read new prefs: /Users/aivlap/Library/Application Support/Blender/2.76/config/userpref.blend
found bundled python: /Users/aivlap/Downloads/blender-2.76b-OSX_10.6-x86_64/blender.app/Contents/MacOS/../Resources/2.76/python
Device init success
Compiling OpenCL kernel ...
Build flags: 
OpenCL error (GeForce GTX 970): [CL_DEVICE_NOT_AVAILABLE] : OpenCL Error : Error: Build Program driver returned (10007)
OpenCL error (GeForce GTX 970): OpenCL Warning : clBuildProgram failed: could not build program for 0x1022700 (GeForce GTX 970) (err:-2)
OpenCL error (GeForce GTX 970): [CL_BUILD_ERROR] : OpenCL Build Error : Compiler build log:
Error getting function data from server

OpenCL kernel build output:
Error getting function data from server
OpenCL build failed: errors in console

Please help