Two little words, switchable graphics. The laptop uses the integrated Intel graphics (integrated into the CPU) for low power or normal use, and uses the dedicated AMD graphics for anything that requires more graphical power (games, etc).
Same thing applies if it has an Intel CPU/GPU (most of the newer i3/i5 and some of the i7's) and Nvidia graphics. Nvidia likes to call their version "Optimus Technology", and despite the fancy name is and works exactly the same as an Intel/AMD combo. Nvidia like AMD also has their own laptop driver version for use with their mobility version GPU's, NVIDIA DRIVERS 285.62 WHQL
and just like the AMD driver doesn't work the switchable graphics,
- Notebooks supporting Hybrid Power technology with Intel chipsets are not supported by this release.
- The following Sony VAIO notebooks are supported: Sony VAIO F Series with NVIDIA GeForce 310M, GeForce GT 330M, GeForce GT 425M, GeForce GT 520M or GeForce GT 540M. Other Sony VAIO notebooks are not supported at this time (please contact Sony for driver support).
- Fujitsu notebooks are not supported by this release (Fujitsu Siemens notebooks are supported).
and requires both drivers from the laptop manufacturer.