y580

I am seriously confused on the price tag of lenovo y580 . in some sites its is around 47k and in some around 59 k or 68k ,some please tell a correct price.

I want to to buy lenovo IdeaPad Y580. It has NVIDIA Geforce GTX 660M Intel Core i7-3630QM 2.4GHz, 6GB DDR3, 750GB HDD. Its a gaming laptop at low cost but it is not available in india. No laptop is close to it in this price range in India. The laptops that are close to it in India are Samsung...

I know Lenovo got better graphics and cpu from below links but can anyone tell me difference between i7 3rd generation and i7 3rd fgeneration quad core processor I'm newbie in this all stuffs and I also wanna know the price of ideapad y580 in India particularly in Surat here are links...