# How is the NVAPI ID determined?

**URL:** <https://forums.developer.nvidia.com/t/how-is-the-nvapi-id-determined/260495>\
**Category:** NVAPI\
**Created:** [July 20, 2023, 7:36am UTC](https://forums.developer.nvidia.com/t/how-is-the-nvapi-id-determined/260495 "2023-07-20T07:36:26Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![steffen.kirres](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@steffen.kirres](https://forums.developer.nvidia.com/u/steffen.kirres)\
**Post date:** [July 20, 2023, 7:36am UTC](https://forums.developer.nvidia.com/t/how-is-the-nvapi-id-determined/260495/1 "2023-07-20T07:36:26Z")

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I didn’t find any information in the documentation on how the NVAPI ID of GPUs is determined, maybe I just didn’t look at the right places though.

I saw IDs with 3 or 4 digits on different systems, but I couldn’t figure out to what those numbers relate.

Does anyone know how they are computed? Does it encode some information like PCI bus or other?

I’d appreciate any helpful hints.

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**Author:** ![agokhale](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/agokhale/32/14047_2.png) [@agokhale](https://forums.developer.nvidia.com/u/agokhale)\
**Post date:** [July 20, 2023, 8:34am UTC](https://forums.developer.nvidia.com/t/how-is-the-nvapi-id-determined/260495/2 "2023-07-20T08:34:00Z")

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Dear @steffen.kirres

Thank you for contacting NVIDIA developer forum.  
Our technical team has received your query and we will get back to you after initial investigation.

Thanks,  
NVAPI Forum Moderator