Posted by The.Scotsman on Oct 19, 2013; 12:03am
URL: https://forum.jogamp.org/GTX-Titan-tp4030242p4030309.html

Solved.
Changed CLPlatform.getDefault().listCLDevices() to CLPlatform.listCLPlatforms(), then collected all platform.listCLDevices(CLDevice.Type.GPU)

While I removed the ATI graphics card, I did not uninstall the drivers.
I guess something in CLPlatform.getDefault().listCLDevices() is still getting the previous default platform (cached?)
(Windows device manager only shows the Nvidia)