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QML, QtQuick2 performance, How to get the best of OpenGL?

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Hi, I have a QML application displayed on 6 HD screens with touch screen capability. My graphic cards are Nvidia Quadro NVS 450. I had some slight latency issues I migrate from Qt4 Quick 1 to Qt5 Qtquick 2.0, and I got some Hudge Latency Issues!!! I read that Quick2 is based on OpenGL 2. How can I be sure to get the best of the OpenGL? Are there some custom drivers for graphic cards which would improve my performances problem, hence solve them?

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