Lenovo Ideapad Y510 VS Lenovo Y50-70 for gaming?

This slow loading very high data table shows GPU (Graphics processor) to gaming:
http://www.notebookcheck.net/...849.0.html
Y50-70 (non-USA current model) has the low wattage powerful gaming GTX 860M, sometimes with 4GB Graphics ram and sometimes with 2GB. It ranks #43 (lower is better). Y510 has GTX 750M, GTX 755M, and the optical drive can be swapped out for a 2nd graphics card module in SLI so you need to watch for what it has in the slot. GTX 755M SLI is only #46, so is slightly weaker, 750M SLI #51, 755M #95, 750M #108, and some competing brands of new laptops are using GTX 850M Rank #52.

So, better gaming performance with less lag is Y50-70, easily. The second advantage is far lower power use, running much cooler. It uses a 4 Cell 54 Watt hour battery where the Y510 uses a 6 cell 63 watt hour one, so on batteries, which uses Intel graphics, the Y510 has the longer life. The Y50-70 is lighter in weight. There are Y510 models with only a Core i5 where Y50-70 should all have the high performance quad core i7-4710HQ, where some competitors are using a dual core U suffix i7 as much weaker.
Y510 has some touchpad issues as not sitting tight in the case in some laptops. That is not common, but has been reported. The Y50-70 has various LCD displays available. There are Y510's out there with only a x768 display, and that is not particularly good.
There are some with a 1080p that has poor viewing angles and is a bit washed out for a 1080p display. Some are better. That is a "luck of the draw" as to which you get. There's an ultra-high definition model and a touch-screen model. Some people around the world are buying a new aftermarket IPS 1080p LCD panel with an appropriate connector and replacing their LCD on the Y50. It is not difficult to do. You look up the youtube videos and forums of discussion about ones with the matching connector and size. With a new IPS panel in 1080p, the Lenovo Y50 becomes a fabulous laptop, still at a reasonable price. It is not required to change the LCD, but is a wonderful upgrade after you buy the laptop. You can also use the HDMI of any of them and go to a bigger external display for at-home use.

So, the Y50-70 is much better for gaming, and is above the highest version of Y510. It runs particularly cool and quiet. It is a good weight. 8-cell accessory battery available.

So, the ONLY issue with the Y50-70 is in the screen/display.
Some base models have a relatively low quality 1080p, found on some Acer systems and the contrast is a low and viewing angle tight. Some have a better one. Some have a 4K display. Some have a touch screen, but that is a waste in a clamshell laptop. You can upgrade the screen, but may need to import to India.

http://forum.notebookreview.com/ideapad-essential/755626-y50-replacement-displays-compendium.html
http://www.gaminglaptopsjunky.com/lenovo-y50-review-1080p-get-the-uhd-y50-version/

The Y50-70 is a great laptop for the price and with GTX 860M gets excellent results.

Go with Lenovo Y50