Lenovo IdeaPad Z50-70 or G510?

I'm going to get a new laptop but can't decide between these two.

The Lenovo Z50-70 looks like a great laptop for what I want which is to be able to do my uni work and also be able to do some moderate gaming.

The Lenovo G510 however is only slightly more expensive but it comes with and I7 core processor rather than an I5 core processor and a different graphics card and lower resolution. Apart from that these laptops are pretty much identical from what I can tell.

My concern is, from the descriptions of the laptops on the website, I can't determine if the G510 comes with the dedicated graphics card or just that it is able to be upgraded.

I'm not sure which laptop to go for and if i really need and Intel Core I7 processor or not.

What are people's thoughts? Which would you go for out of the two?

Thanks.

Lenovo Z50-70 - http://www.ebuyer.com/624118-lenovo-z50-70-laptop-59416331

Lenovo G510 - http://www.ebuyer.com/614840-lenovo-ideapad-g510-laptop-59406131

Added (1). Also, do you think i will need a cooling pad for it? If so what would you recommend?

What do I do without an OS?

I have bought a lenovo ideapad z510 laptop. When I started using it, a black page with some writings came. I wanna boot my device and install a windows. What do I do? ( Don't say how to install the windows I wanna know how to boot it.)

Is it safe to buy a Laptop off of Amazon?

Ok I just wanted to know if it's safe to buy off of amazon and more importantly a somewhat expensive gaming computer along with a cheap headset.

Lenovo Idea Pad y510p: http://amzn.to/...to/1qeS0XE

Turtle Beach Ear Force Z11: http://amzn.to/...to/1rZtZIT

Is this a good Combination?
and is it safe to buy this much off of amazon at ones?

Anyone have experience I have never bought anything online.

10 Points and 5 stars to best answer.

Added (1). One more thing how should I buy this with an Amazon gift card or with a Prepaid Credit card I'm only 17 year old so Don;t have a Credit card.

What do you guys think about the specs on this laptop? - 1

http://shop.lenovo.com/...ies/y510p/" class='ext_link'>http://shop.lenovo.com/...ies/y510p/

(Referring to the one that is $899)

I want to use this laptop for gaming and for personal use. Will this laptop be able to play some of the new gen games? Like Watch Dogs, Batman Arkham Knight, GTA 5 (potentially). For how long will this laptop be relevant before the gaming market gets too good for its video card, processor etc. I do realize that some of the spec details for these games haven't been realized yet, but what are the chances that this laptop could run them at a sufficient level.

I would like for the games to run at least medium settings.

Should I format or just take it to an expert?

I have two laptops a Lenovo and a Toshiba. I don't use either very much however the people that do use them use them to watch things online which has a lot of pop ups and to browse. Both are windows 8 and the Lenovo is about a little less than 2 years old and the Toshiba is a little under than 1 year old. The Lenovo is very slow, has no anti virus or anything and google chrome (my preferred browser) doesn't open although it is installed. The Toshiba works fine a lot of the time but sometimes when I move it and its not on a flat surface (I usally keep it in one place) the screen just blacks out at certain angles until I move it to the original angle. I do not have the patience to endure this anymore. I have never formatted a laptop but it seems pretty easy from what I've read online or should I take it to a professional.

Added (1). And what is the worse that could happen if something goes wrong with the formatting?

Can my laptop run league of legends smoothly?

I recently got a Lenovo IdeaPad G510.

Specs:
Intel Core i5 4200M (2.5GHz)
4GB Memory 500GB HDD
Intel HD Graphics 4600
1366 x 768
Windows 8.1

I want to run it but i'd rather not if it will slow down my computer a lot. I don't mind running it on a lower setting, as long as it runs smoothly. Do you think my set up would work?

Why can I not find a new lenovo yoga 11s clementine orange laptop?

I've looked at best buy and they said that they only had the silver version which is good but I like the clementine orange color. Then I looked on Lenovo's website and it said that it was sold out but only in that color and I can't find it anywhere else new. I've found a few refurbished but i'm hesitant to get them, any ideas/ places I overlooked?

Is this a good laptop for Runescape max high settings?

I'm going to go to college for Graphic Design so I need a good laptop to work on homework, etc but I also want a laptop that will be able to play Runescape in max settings without lag. I was wondering if these were good laptops/which one is better/are there better ones? :

Lenovo - IdeaPad 15.6" Touch-Screen Laptop - 4GB Memory - 500GB Hard Drive

and

Toshiba - Satellite 15.6" Laptop - Intel Core i5 - 6GB Memory - 750GB Hard Drive - Smart Silver

I looked them up on Best Buy and their both around $550 and I'm shooting for $500-$700

What gpus can go inside a Lenovo Y510p?

I talk to multiple representatives and they know it can be upgraded but they don't know to which ones so does anyone know?!
http://shop.lenovo.com/us/en/laptops/lenovo/y-series/y510p/