Is that 17W full tilt? The 7900 GO GS is 20W full tilt.
That'd be the 7900GS, not the GTX.
I've seen that figure for the GS around, but I'm skeptical. Compare the hardware to its bigger brothers in the 7900 range and it appears to be quite a lot more than half of a GTX yet is being quoted as having less than half the power usage.
Given there's no process advantage or the like, this seems unlikely, since normally doubling a design doesn't double the power requirements...
Of course, it could just be like the Intel vs AMD method of measuring TDP -- AMD's is peak, Intel's is average draw. Apples to oranges, and all that...
With power profiles I don't know why Apple couldn't stick a 7950GTX in the MBP. By the time you get to full tilt power wise your fans are probably already going full speed. I am pretty sure the GPU runs at 100mhz when on battery savings profile. So your wattage shouldn't be too different from the X1600.
Bear in mind the X1600 already does this and yet in the 15" MBP, Apple still underclocks it.
Oh and you guys should want Nvidia GPU's in your systems. Nvidia has had a history of better OpenGL support. The biggest grip with OpenGL that I have heard is not knowing when using a certain feature throws you back into compatibility mode (ie using CPU to draw stuff).
That's pretty much down to drivers. It'd be interesting to know if Apple lets the IHV write the opengl drivers or if they write their own.
I'm still hardware agnostic.
On a totally different note, I do wonder if the LCD backlights come to fruition, will that allow a much better GPU due to a) much lower LCD power draw and b) LED-backlit displays are MUCH thinner.
That might make things more viable.
Even then, I would hope a Go 8xxx or X2xxx HD part would show up in time. I know ATI supposedly has a May date on delivery, but hitting ship dates appears to not be ATI's strong point these days...