Which graphics card is better? Gt 750m sli or the new GTX 860m?

I have been looking to buy a new laptop for gaming and the Lenovo y510p has had my attention for a while due to the dual GT 750m in it. Then recently the 800 line of mobile cards have been released, so I was wondering if anyone can give me answer on which would be a better choice.

I'm not an expert but after searching around on the Internet for a while (I'm also going to buy a new laptop) I would say go for the new 800M GPUs. They are more powerful and much more efficient. Have you seen the new Lenovo Y50? (upgrade from the Y510p)

Obviously GTX 860m is better…

Hey get The GTX 690m for better results.it gives the maxed performance.Ofcourse GTX860m is better than a gt750m. Hope i helped.