[Open] Illustrator and Photoshop lagging in i5+6GB RAM


I own Lenovo Z510 laptop with configuration - i5 4th gen, 6GB RAM, 8GB SSD(hybrid). and Nvidia GeForce 740M. Even in this configuration Illustrator and Photoshop CS5 is lagging (Even when working without textures, just plain colors). How can I optimize the settings? In Photoshop for hardware acceleration it uses onboard Intel 4000 graphics. Is that the reason? I am not getting Nvidia on drop down (switchable graphhics?).

Please help. Its painfully slow!


Computer Addict
I have used both at a time on a machine with similar configuration. Make sure that there are no resource hungry software running in background.
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