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Thank you again. Everything is working as intended. One last question, how do I know if i'm running x1.1Opt?

Thanks Tech Inferno Fan, disabling my dGPU worked, optimus is functioning correctly, however, I cannot seem to use my intenal LCD display. Where is said option located?

Thank you, I'll buy setup 1.x to disable my dGPU then.

Do I need to disable the dGPU to run optimus? Thanks

In that case I'm not disabling it, it's just not functioning correctly. The thing is I did manage to get everything working everything except optimus...unless I do need to free the pci-e bus to make it work. Thanks for the reply. Edit: I just noticed that all three cards are working and none have any errors, my internal uses Intel HD and my external my 660 Ti.

Thanks for your reply. I did manage to install the eGPU but it only works using an external display and there's no optimus option. My PE4L is set to SW1=3. The problem is that I don't seem the have an optimus option, is it automatic or do I need to enable it in the BIOS? Also, my intel HD remains active on my main display and I can disable my dgpu manually.

Sorry for that, I have a Lenovo y560 with an i5 560m - Intel HD. Also a HD 5730 as a dGPU,

Hello, i'm trying to enable optimus for my 660 ti. The desktop driver installs successfully but i can't find the option to enable nvidia optimus from the control panel. Is there anything i'm missing here? Thanks Edit: I'm using the Windows 8.1 beta driver.