« on: August 27, 2014, 01:55:24 AM »
Using the Nvidia card does make the laptop run hotter, resulting in the fan kicking in faster and louder
That is when getting a laptop that is made for such high performance pays off. Here in Asia Pacific I am nearly always working in hot temperatures, and when I render HD videos and do other stuff that pushes the laptop, it never overheats and I hardly ever hear any noise from the fans (and I still have not cleaned the fans out yet, which will make them even quieter - though I wonder if that is even possible!). It is this amazing build quality, that makes me recommend the Dell Precision range - especially the M6XX - as they are built like tanks and are imho, the best available on the market.
The application or game is recognized by the nvidia software/profiles, and switch to the recommended GPU, but it stays on that GPU until you exit your application.
For example: You start up your computer and the Windows GUI is always using your onboard (intel) GPU! When you decided to start an application or game, and that's were it wil switch to the recommende/preferred GPU when the program is recognized (profiles). When you exit the application or game optimus switch automatically (there you have it!) back to your onboard GPU. Try to run WEI (Windows Experiance Index) it would allways run on your onboard GPU.
Photoshop CS6 and CC does benefit from the much stronger nvidia GPU against the onboard intel. True you won't notice it when painting or fill a color, but more and more actions or plugin's use complex maths (OpenGL/OpenCL/Cuda) and that is were the nvidia GPU really shines!
I hope this clears it up for you... It does not change dynamically/automatically between your onboard or dedicated GPU while in your application or game.
Good explanation, MXM. Thanks.