picking a laptop and gpu question

[ChaseDown26]

I am looking at 3 differnt laptops atm and having a hard time picking between them.
Acer E5-551G-T0JN with a A10-7300 and R7-265m.....$589.99 8gb ram win 8.1

Lenovo? Z50 with just the A10-7300
$499.99. 6Gb ram win 8.1
Or
HP Probook 450 G1 ,with a i5-4200u and a Hd 8750m ,$599.99 8gm ram win 7 pro with win 8.1 license


I know the Z50 is the weakest graphics wise.. but being the cheapest helps. My gpu or apu question is can the acer run dual graphics... amd website says the a10-7300 and R7 265m support it but on acer site they talk about dual graphics not available on any laptop..., maybe that tech is just dumb? or maybe acer implemented hardware that prevents it.
If Not Then the main decision will be how much better is the R7 265m... i read that its bassically a newer faster 8750, and the z50 being system based for performance i have concerns. Which would be good for the following type of games?

I am mainly going to use this laptop for mobile gaming... nothing to.serious ... league of legends, robocraft, team fortress 2, starcraft 2, and any free games from steam and.amd evolved. I have a desktop with a 7770 oc edition for better gaming but my simpler games.i would like to plahyaway from the desk. Btw this is posted from my phone so.sorry for errors.. touch keys to small lol thanks guys. Oh ive never used win8 Or 8.1 Not opposed to it but just not sure.

Edited to add ram ammounts and operating system.

 

[Elion11]

r7 m265 is good for these games but cpu im afraid not ... i5 u version isnt good unless u care for battery life , a1o is also weak

 

[ChaseDown26]

Is the i5-4200u better than the a10-7300? I see acer also has a i5-4200 with the r7 265m on thier website for $40 less but it only has 6gb ram

 

[ChaseDown26]

Also is the r7 265m noticeably faster/better than an HD 8750m? or should i look for a gt840m

 

[ChaseDown26]

Oh and i was wrong about the hp computer it has a i5-4200m. Is that betrer than a i5-4200u? which should i go With the one with the HD 8750m And i5 ... or the R7 265m with the A10-7300?

 

[velo3100]

The i5 - 4200m is better than the 4200 u cpu but the type of games you play will not be as affected unless you are playing at more than med settings. The gpu is the most important thing for the type of games you play. I would get the one with the R7 gpu out of the 3 laptops you have chosen provided you play at low settings.

 

[ChaseDown26]

Thanks for youe answers it looks like im leaning towards the acer then. If the then i see vids of people playing lol and such at pretty high settings fine... maybe its because ita on 720p But that is ok cause The screens are max 720p anyways. Also do does anyone know if i could run th. Apu in mantle and use the r7 as my sole graphics option or is that sorta how the apu will work anyways? ,ive never had an apu before sorry if the question is dumb.