Not at again....
"It's quite possible the Core processor could keep its built-in Intel GPU, activating the beefier AMD Radeon part as needed"
Let's hope not, Optimus was shit. Lots of games would detect both cards and insist you pick one, but picking the Nvidia resulted in no display. Or they simply couldn't detect the Nvidia at all.
Even when it did work and the Nvidia chip did the graphics work, it did it poorly compared to systems with just the Nvidia graphics chip without Optimus.
Biting the hand that feeds IT
