I'm talking about chipsets. You are mixing up graphics & chipsets.It affects every portable mac. Currently they all use an nvidia chipset. No current portable macs use intel chipsets. Currently there are only Intel chipsets for Core i5 & i7 processors.
For a computer to use a Core i5 or i7 it will need to run on either:
A 2 chip system with an intel CPU & intel chipset/GPU or
A 3 chip system with an intel CPU, intel chipset & AMD or Nvidia GPU.
All the current portables...