So, I'm a bit confused regarding the graphics card situation. Maybe you guys can help me out. From what I understand, the current chip in the 15" retina macbook pros is a tricked out GT 650M, with higher clock speeds such that it actually performs better than higher-end chips like the GTX 660M. (
https://forums.macrumors.com/threads/1393606/)
it actually performs the same as the 660m, since they have the same clocks with boost
Now, from what I understand, the 750M is just a rebrand of the 650M, but Nvidia is adding some GPU Boost 2.0 magic which (from my limited understanding) means the chip can dynamically ramp up the clock speed as high as possible without running into thermal or power issues.
the 750m is just a rebranded 660m, the 640m/650m/660m are the same gpus, with the difference being clocks and up to the 650m the use of GDDR5 or DDR3 with clocks adjust accordingly to the choice
GPU boost 2.0 is nothing more than a crippling feature:
1) it has some levels on how much the clocks can go up
2) it adjust those levels according to the cooling
3) the lower base clocks of the "new" gpus are actually lower than past year 650m, non apple
So if your cooling can handle it will go up to 1060mhz if Im not mistaken on the core, however it depends a lot on the cooling, if you skimp on it, it will be at the base which is a whole lot below that, cant remember how much.
If Apple's already boosting the 650M clock speeds way up, will upgrading to the 750M really help? Sounds like they'd just be squeezing every last drop of performance out of what is essentially the same GPU.
they are trying to do exactly that, squeeze out everything that kepler can offer. its a rebrand after all.
however given that we are dealing with apple and the higher cpus skus already throttled it, you can guess that we dont have much leeway in terms of how much that gpu can boost
I mainly ask this because I do fairly heavy gaming, and I see the GPU of this machine as the main potential bottleneck for me. Everything else about the rMBP seems amazing and really fast. I realize this isn't a gaming laptop but I don't want a "real" gaming laptop because that would mean no OS X (which I need for my iOS programming job, and I just prefer in general.) I just hope Apple throws in a more significant GPU upgrade as a nice bonus.
gpu options are the gk106 760m, the gk 107 750m or the 8870m
since you want OSX thats the best that you can get on their mobile.
but if nvidia is to be believed they have sprinkled unicorn horns in form of powder, since this gpu will have 75% better performance than the 650m