# How to install 2 8800 GTX cards?

**URL:** <https://forums.developer.nvidia.com/t/how-to-install-2-8800-gtx-cards/559>\
**Category:** CUDA Programming and Performance\
**Created:** [April 11, 2007, 9:22am UTC](https://forums.developer.nvidia.com/t/how-to-install-2-8800-gtx-cards/559 "2007-04-11T09:22:10Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![UsagiKoneko](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@UsagiKoneko](https://forums.developer.nvidia.com/u/UsagiKoneko)\
**Post date:** [April 11, 2007, 9:22am UTC](https://forums.developer.nvidia.com/t/how-to-install-2-8800-gtx-cards/559/1 "2007-04-11T09:22:10Z")

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I have 2 8800 GTX cards installed and I have no problem running CUDA on one of them. The problem I have is when I call cudaGetDeviceCount() it returns 1. Both cards can be seen by the Windows device manager.

Any ideas how I can fix this?