How can I tell NVIDIA Optimus to always run Google Chrome on my NVIDIA (rather than Intel) card?
The "Run with graphics processor: NVIDIA" option doesn't seem to have any effect, and NVIDIA for some reason seems to disable it in the control panel:
Windows – How to run Google Chrome with NVIDIA card (Optimus)
google-chromenvidia-graphics-cardoptimuswindows 8
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Short answer: It doesn't "switch" and you can't disable the Intel IGP.
Long answer: From a hardware point of view the Intel IGP is always handling image output to the laptop's LCD screen. The NVIDIA GPU copies rendered graphics into the Intel IGP's frame buffer (which resides in system memory) when it is active. The Optimus software makes certain programs use the GPU based on the loaded profiles and user settings. It currently does not support running the OS desktop compositing on the GPU.
See the Optimus White Paper for more details.
The Asus K43SJ does not use the integrated Intel HD graphics (whether it's on the CPU or not), so you're not going to be able to use Optimus.
I came to this conclusion by the fact that the Intel Graphics are mentioned nowhere on the support page for that model, and the fact that they ONLY offer the nVidia driver (where as the K53SC does provide both the Intel and nVidia drivers).
The technology is there in the nVidia card, the CPU and such, but since this was produced right in the time-frame that Optimus was starting to be implemented, I think you just got a model series (the K43) that Asus put out before they had Optimus ready (I don't believe it was introduced until the K53 series).
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Update
It looks like a newer version of the GeForce driver allows the nvidia card to be selected for chrome.exe
You can check GL_RENDERER at chrome://gpu which should then say GeForce.
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According to NVIDIA, chrome and firefox both have been disabled from using the Nvidia GPU by design.
This is a death blow to WebGL in web browsers on optimus laptops and I have no idea why they decided to do this.
source [geforce.com]