Well the fact of the matter is Apple isn't using discrete graphics in the 2013 rMBP. Furthermore, you cannot add discrete chips without a corresponding loss of battery life. Now the kepler may be efficient, but it's not without 1) obvious additional costs and 2) losses in battery life during certain usage scenarios.
Intel claims that the GT3E is faster than the GT650M. Based on the fact that apple is no longer using discrete, i'm inclined to believe that.
The 2013 rMBP isn't using discrete. Take that for what it's worth. You can argue until you're blue in the face about how mobile discrete isn't dead, and I would agree with that for full size gaming laptops. However, we know this: most ultrabooks already (95%) do not use discrete. The biggest discrete customer was Apple and now THEY aren't using discrete.
The facts here are just very telling. You can either ignore them, or argue until you're blue in the face about hypothetical matters.
Sure I can add a discrete gpu without affecting battery life. I simply don't use it when I don't need it (go to nvidia control panel select "use integrated graphics processor"). There now the dgpu is using no power because its not activated. No battery life hit (or very very very minimal). Considering when on battery I'm usually not doing anything that requires heavy gpu activity it has no effect on me at all.
The edram costs $50 alone; given the additional cost of a gt3 chip vs a gt2 chip it would not be surprising if a 650m costs LESS than a gt3e chip.
I don't know if the 2013 rmbp will use a dgpu or not. All we have is a few rumours (there were rumours that the mba was going to use amd's apu too last year). Its too early to say with certainty.
Second, which 650m? One with DDR3 or GDDR5? One at the reference speeds or at the boost speeds? Apple also uses an overclocked 650m in their machines.
I'll believe intel's claim when I see it confirmed. However, I will say that I doubt that the gt3e will be able to compete with a 650m at boost speeds (basically every single chip runs at boost speeds) with GDDR5 (which is how you usually find the 650m) in the majority of cases. Intel drastically needs to improve their drivers (the hd 4000 performs very similarily to the hd 3000 in certain situations).
2.5x increase.
3840QM gets around 730 points. 730 x 2.5 = 1825 points. The 650m gets around 2200 points (gpu) at 835 mhz and 2000 points at 745 mhz. Either way I see the gt3e more as solid competition for the 640m. Can it compete though with the 650m? Yes. Will is lose most of the time? Probably. (And the 650m has been replaced with the 750m with clocks of 967 mhz + boost).
I agree that for the most part igp will make discrete obsolete in the majority of cases but I wasn't talking about ultrabooks. (Plus anything that can fit a 47 watt tdp cpu in it is probably not an ultrabook).
I guess I bolded some extra text.
Comment was primarily in relation to
Hell, many gaming tablets/laptops actually use GT650M so many gaming devices will probably use GTe3 as well this time around.
Which will definitely be true when space or thermals are an issue. But price? Not necessarily. Performance? Not necessarily.
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