I had the same problem as you, but I finally found a fix for it through the Nvidia Control Panel. I have an integrated Intel HD Graphics 4600 and an Nvidia Geforce GT 750M
Right click on the desktop and open nvidia control panel.
Then head to the "manage 3D settings" drop down under 3D settings.
Then under the global settings tab, underneath preferred graphics processor, change it from auto detect to high performance graphics processor.
Now your laptop should be using your Nvidia GT 630M for almost everything, including your steam games.
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^What this guy said.
Some games require you to select the games' .exe from a browse for programs thing and then it lets you force the nVidia card to be used when that .exe is run.
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Then follow the same method as I mentioned, but instead go to the program settings tab instead of global settings, select the .exe for Sleeping Dogs, and for the preferred graphics processor, change it to high performance graphic processor.
If that doesn't work, then maybe try disabling the integrated graphics card through device manager
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For games that use DX9 you can also try the optimus fix : http://skyrim.nexusmods.com/mods/33227//?
I'm not sure you can run Sleeping Dogs in DX9 though
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Go to BIOS settings and disable the integrated card.
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I'm currently using a laptop which has an integrated Intel 4000 HD card and a Nvidia GT 630M. But the problem is, when I run the Sleeping Dogs benchmark test, it claims I'm using the Intel card, not the Nvidia one. I'm also starting to suspect that my computer isn't using the Nvidia card at all. By the way, this is after I went into the Nvidia control panel and set Sleeping Dogs to use the Nvidia card. Any idea how I can fix this and make the Nvidia card default for all Steam games?
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