If you made rthe mistake of buying a laptop with a Geforce Optimus device, those are no longer a complete dedicated GPU, only the back half of one that requires the Intel chip working to make up for the now-removed front half.
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- I don't think mine is a Optimus device not sure, my laptop is Lenovo IdeaPad y510p
TTBOMK, nVIDIA ceased selling any complete mobile GPUs for laptops such as yours, about three years ago, maybe even longer. If yours is older than that, the Optimus types already existed, but stocks of unspayed GPUs were still available afterward.
http://steamcommunity.com/discussions/forum/11/558752356793395263/
http://en.wikipedia.org/wiki/Nvidia_Optimus
According to that author (s), the class of hardware has been around before 2010.
