CUDA on battery power

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http://forums.anandtech.com – When the power cable is unplugged the nvidia dedicated card in the laptop is disabled. Can I still use the nvidia gpu for CUDA computations. The display can run from the Integrated Intel GPU. I just need the Nvidia gpu for doing cuda computations and not visualizations. If not is there a way to tell it to never disable the nvidia GPU via some option in the Nvidia control panel? (Hardware)