That's a common argument but it isn't necessarily true. Just remember, the basic design on the 13" MacBook Pro originated from the unibody 13" MacBook which probably began design almost three years ago (since the unibody MacBook was introduced in Oct. 2008). I'm not the first to take issue with such claims, note this response by another forum member just yesterday:...Without making the logic board larger, there is physically no room for (a) the processor, (b) the chipset, and (c) a discrete GPU on the 13" MacBook Pro. For this I cite the dozen or so Logic Board transplants I've done on that exact machine. I know what it looks like naked and it doesn't have the goods....
To which I replied:People make this claim as if it were a fact.
Only the Apple motherboard engineers know whether it's possible to include a separate graphics chip (not "card") on the board.
Parts get smaller, more integrated (so you need fewer of them), a port could be removed or moved, the battery could be made slightly smaller (since Sandy Bridge can use less power, this wouldn't necessarily reduce battery life).
Apple's engineers may surprise you.
Lastly, when engineers designed the motherboard for the original unibody MacBook I don't believe that they began by saying that we're going to cram everything possible into this form factor. They look at price targets, manufacturability (for the time when the product will be introduced), battery capacity, heat dissipation, and other factors and then attempt to build a system that can remain competitive for at least a few years without major change (or which has relatively easy upgrade paths). In fact, it would be kind of pointless for them to spend money on any effort to make the motherboard smaller than it actually has to be (that is, include unused space within the enclosure). The flip side or balance to my argument is that they also won't make a motherboard design larger or populate it with more chips simply so that it fits nicely within the enclosure (that is, unless doing so has other significant benefits or if that larger size is required for practical or technical reasons). So, in a sense the motherboard design becomes a balance on cost, manufacturability, target market, form factor (size), and projected product lifetime.fpnc said:...In fact other manufactures have managed discrete graphics in systems similar to the 13" MacBook Pro's form factor. Of course, you're not going to find many systems (or any systems) that are an exact duplicate to either of Apple's full-featured 13" MacBooks. Once you figure in Apple's profit margins and some of the Mac's unique features it's hard to make direct comparisons to determine what may or may not be possible.
Although I've suggested the removal of the optical drive from the MacBook Pros I've never tried to insist that this would be the only way they could fit a discrete graphics chip into the 13" form factor. It might make it easier and cheaper to do so, but it's probably not a requirement given other changes and the march of technology over the last several years.