# Problems encountered in multi-GPU rendering

**URL:** https://discourse.vtk.org/t/problems-encountered-in-multi-gpu-rendering/5366
**Category:** Support
**Created:** [March 11, 2021, 9:08am UTC](https://discourse.vtk.org/t/problems-encountered-in-multi-gpu-rendering/5366 "2021-03-11T09:08:30Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![Jone7](https://discourse.vtk.org/letter_avatar_proxy/v4/letter/j/e36b37/32.png) [@Jone7](https://discourse.vtk.org/u/Jone7)
#### Post date: [March 11, 2021, 9:08am UTC](https://discourse.vtk.org/t/problems-encountered-in-multi-gpu-rendering/5366/1 "2021-03-11T09:08:30Z")

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I tried to render a large scale model with VTK on two GPUs, but found that one of the GPUs was underutilized, like this:  
 ![0NOG_F59CBKMM)0](https://discourse.vtk.org/uploads/default/original/2X/8/8c2f356b81f05a4c582dbdebed873796bbe23eb3.png)  
Does the VTK not support multiple GPUs? Or has it unique Settings?

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### Author: ![sankhesh](https://discourse.vtk.org/user_avatar/discourse.vtk.org/sankhesh/32/73_2.png) [@sankhesh](https://discourse.vtk.org/u/sankhesh)
#### Post date: [March 12, 2021, 3:51pm UTC](https://discourse.vtk.org/t/problems-encountered-in-multi-gpu-rendering/5366/2 "2021-03-12T15:51:37Z")

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VTK relies on the platform drivers for providing the graphics resources. You might have to enable multiple GPU settings at the OS hardware driver level.