GPU Pass-through not working after installation of GPU Card
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Article ID: CTX224630
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Description
Virtual machine not recognizing NVIDIA GRID K1 video card
Resolution
Once the video card has been installed on host server and the appropriate drivers installed on the hypervisor, perform the following on the windows machine:
- Ensure GPU-enabled for the Windows desktop machine
- Install NVIDIA GPU guest OS driver (available in the NVIDIA GRID vGPU Pack).
- Install the Hypervisor Tools
- Install Citrix HDX™ 3D Pro Virtual Desktop Agent
If you continue to see an exclamation mark under display adapters in device manager

Most likely reasons could be:
- GPU driver service is not running
- Server hardware is not supplying sufficient power to the GPU cards
- Incompatible GPU driver
Problem Cause
NVIDIA drivers
Additional Information
https://www.citrix.com/content/dam/citrix/en_us/documents/go/reviewers-guide-remote-3d-graphics-apps-part-1-xenserver-gpu-passthrough.pdf
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