# CUDA is not currently available on your system -DentalSegmentator problem

**URL:** <https://discourse.slicer.org/t/cuda-is-not-currently-available-on-your-system-dentalsegmentator-problem/43738>\
**Category:** Support\
**Tags:** segmentation, python\
**Created:** [July 16, 2025, 10:21am UTC](https://discourse.slicer.org/t/cuda-is-not-currently-available-on-your-system-dentalsegmentator-problem/43738 "2025-07-16T10:21:29Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![tarikau](https://avatars.discourse-cdn.com/v4/letter/t/ecccb3/32.png) [@tarikau](https://discourse.slicer.org/u/tarikau)\
**Post date:** [July 16, 2025, 10:21am UTC](https://discourse.slicer.org/t/cuda-is-not-currently-available-on-your-system-dentalsegmentator-problem/43738/1 "2025-07-16T10:21:29Z")

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Hello,  
I’ve installed DentalSegmentator extension together with PyTorch extension. When I click on Apply, it says:  
“Selected device (CUDA) is not currently available on your system and will default to CPU device.  
Running the segmentation may take up to 1 hour.  
Would you like to proceed?”

When I check CUDA and PyTorch on Slicer:

print(torch. **version** )  
2.7.0+cpu  
print(torch.version.cuda)  
None  
print(torch.cuda.is\_available())  
False

It gives these infos but I have CUDA installed (CUDA Version: 12.9).  
Also I have NVIDIA GeForce RTX 4090.

How can i solve this problem?

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<div class="post-metadata">

**Author:** ![tarikau](https://avatars.discourse-cdn.com/v4/letter/t/ecccb3/32.png) [@tarikau](https://discourse.slicer.org/u/tarikau)\
**Post date:** [July 16, 2025, 11:41am UTC](https://discourse.slicer.org/t/cuda-is-not-currently-available-on-your-system-dentalsegmentator-problem/43738/2 "2025-07-16T11:41:01Z")

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I managed to solve my own problem. Apparently PyTorch is using only CPU as default at least on my case. I changed that form PyTorch Utils extention.