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Help Needed: OpenCL is available for only AMD or NVIDIA when installed in the same x399, Windows 10 Pro system

Question asked by achakbrooks on Apr 11, 2019
Latest reply on Sep 5, 2020 by oldbonniegamer

OS: Windows 10 Pro (Build 1806)

CPU: AMD Threadripper 2970wx

RAM: 32GB (16GBx2) G.Skill f4-3200c16-16GVK

MOBO: Asrock x399 ATX Taichi

NVME: Samsung 950 PRO - 512GB


GFX: Radeon VII x3 ( ASROCK + MSI + PowerColor) DRIVER: Adrenalin 2019 Edition 19.4.1 (April 3rd, 2019)

GFX: Zotac Nvidia 2080 TI DRIVER: NVIDIA Creator Ready Driver 419.67 (Tried all variations of their drivers)



I have an issue with running AMD and Nvidia cards in the same system with OpenCL NOT being enabled for both.

When installing the drivers each seems to override the others drivers for OpenCL making the last driver package installed the only OpenCL device active.


I want to be able to use the "OpenCL" compute power of all cards depending on the task needed. "ie GPU Rendering with AMD ProRender, etc..."


I had this issue perviously, but was able to resolve it with older NVIDIA cards/drivers and changing some settings in the Windows Registry.  Which let me have both NVIDIA & AMD GPU's running OpenCL together on my windows and Mac system (via EGPU) (previous systems being Intel x99/x299 (LGA 2011-v3 & 2066))


I do not think this is isolated to an "NVIDIA" driver problem because when installing AMD's driver setup last the same reversal occurs and Nvidia's openCL options are removed for AMD.


I have used DD Uninstaller to wipe my system, prevented windows from involuntarily installing some default drivers, tried different combos of installations, BIOS config, windows regedit to point to the right OpenCL drivers (for each card) but I can not get the system to recognize/activate OpenCL for both cards at the same time. (I used GPU Caps Viewer to verify the GPUs availability) ie Luxrender/luxmark, Blender's Cycles, AMD's Prorender can only give the OpenCL option for either AMD or Nvidia vs previously both were given as mixable/selectable options.


It must be something stupid I am doing. ie. This is my first setup with AMD Motherboard/Cpu's so maybe?... if there is something I am missing in how AMD Boards work vs. my previous builds it would be nice to know.


Currently I have just one AMD and one NVIDIA card installed.


Thank you for your time.