How to tell if CUDA is enabled?

So, I managed to successfully install the latest CUDA drivers for my newly installed Gigabyte GeForce GTX 760 GPU.
I am not sure how to check they they are working, but the CUDA option appears in my System Preferences, so I'm assuming they do for my system in general, but I see that there are many tutorials on enabling them specifically for Premiere and After Effects. There are, however no tutorials for anything above CS6. I have CC 2014.
I am not sure whether Premiere is using my GPU for it's Mercury Playback Engine or not. There is an option under Project Preferences to choose the rendering: "Mercury Playback Engine GPU Acceleration (CUDA)" acceleration is there, and it's not greyed out and I have selected it, but how can I tell if it is using it. Also, can anyone tell me how to set this as a permanent preference in Premiere?  Not just for this specific project.

Once selected it will work. It should come up selected for any future projects.

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    Subject: How to tell embedded jinitator applet is still running when window closed
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    Subject: Re : How to tell embedded jinitator applet is still running when window closed
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    Subject: Re : How to tell embedded jinitator applet is still running when window closed
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