Never got this: What is my GPU? an AMD Radeon HD 6770M or an Intel HD Graphics 3000?

Your MacBook Pro has both. Theoretically, applications that require the beefier video card automaticalloy enable it when they open (and switch back when they close). You can download this free app to see when that happens, as well as force the discrete card to be used all the time.

http://codykrieger.com/gfxCardStatus

There is an option in the Energy Saver Sys Pref for Auto Graphic Switching. Turn that off and it will default to the AMD graphic chip all the time.

Also yu can install gfxCardStatus that will allow you to switch it from the Menu bar and set one or the other as the default/constant GPU to use.

Yes, that should be how it works. AMD=discrete. Intel=integrated.

You may also try Shootist007's advice, though I do not see such an option in my Energy Preferences under 10.8 (unless I am totally missing it).

You will only see that option if there are 2 GPUs in the system. All 13" MBPs only have the one integrated GPU so that option does not appear.

You're Welcome.

Really? I have the rMBP and I don't see it at all. 10.8 bug?

It may be in some other part of the Sys Prefs on the Retina models or simple because of the Retina display the built in, integrated, GPU is disabled as it can't power that screen. So essentially you only have one GPU in the Retina systems.

The Intel HD 4000 can power the retina display. In fact, if you use AirPlay, it defaults to the 4000 in order to do so. The NVidia won't even work. Apple would not include a second GPU if it didn't work.

Ars mentioned this in their review:What confirmed this requirement for me was the fact that my Retina

MacBook Pro switched to integrated Intel HD4000 graphics even when otherwise running on the discrete NVIDIA GT 650M GPU.

http://arstechnica.com/apple/2012/07/mountain-lion-airplay-mirroring-v-airparrot -fight/

Well then why don't you have that option?

The Intel GPU is included on all Notebook CPU chips. It is Integrated into the CPU. Nothing Apple can do to remove it. That does not mean it has to be used or that it can power the Retina display. The Airplay mirroring may use it so it doesn't tax the discrete GPU that is powering the Retina display.

I got a question about this; 2 days ago I was gaming to finish my battery for charging cycle, when my computer got %10 battery I guess GPU changed to HD 4000, because all the fps i get started to slow down. Anyway, when I charged my macbook pro retina, I thought that this problem going to be solved, but when I started gaming again, there was no diffrence between with the %10 battery performance and %100 batter performance. I downloaded gfxcardstatus to change GPU manually (to Nvidia), but again nothing has changed 😟 . Actually when I try the games by choosing HD 4000 or Nvidia Card, there is no change at all:( all the fps is same.

Is there a possibility like my computer damaged or something? Or should I install Nvidia's drivers again? (If there is such option) Should I replace this macbook pro retina?

Answers will be appreciated , regards