dan

just put the card under load,and look in the gpu-z for the pci-e link,must be gen.2 according to your setup gen2 bandwith gives a real experience on the internal screen...

ok.look if the pcie link is working on x1.2 I am using pe4h v2.4 wich i had try in various notebook,not gen2 compliance,although remember once achieved in a msi with an i7 Sandy bridge to reach gen2 bandwith.

ok. it will work finally,that is my guess..

ok. let me know the news.

you will not see two display in the optimus internal screen,only you wil have a transparent option in the nvidia control panel wich alows to use egpu as a preferred render graphics

try to install Windows 8.1 driver versión for gtx960...

Start thinking that your dgpu interfiere in some way in the optiumus function,i am quite sure that you will have acceleration in an external monitor but the internal display function it is disabled.

ok.it is how it should be.....

and don´t give up....it is not an option,keep trying drivers and search for documentation in this fórum...i can guarantee that it will work sorry,screenshots... windows has a tool that make just that,search "screenshot"in the search box of cortana... http://www.howtogeek.com/226280/how-to-take-screenshots-in-windows-10/

Please make a snapshot of your display manager list and device system list.

are you familiarized with upgrading BIOS procedure ?could unnhide the option to disable the dgpu within your bios . Not recommended if you not have experience with this .....

Try the latest see what hapenning,then try any driver before 372.70 .I am sure you will get the internal screen functionality one way or another. i will take a look inside your bios see what options you have.

I am unaware of optimus functionality lately regarding the drivers,try the last one and let me know please.Also i want to know wich operating system are you running.

Hi,now that you left only the igpu and the egpu,download the driver for the gtx960 from the nvidia website,the last one.let it untouched. try to install it an let me know what is hapenning.

The 740m need to be eradicated from the displays manager list,you have to see only the igpu and the egpu there. There is two ways to do that,disable in bios or use x1setup provided by ******. Sincé none of them is available for you you coud try to disable the pcie that host the gt740m,not the card but the pcie bus that host it in the system device. Works for me few times. i see you are mod the driver,guess there is no need for that,once you achieved that the system not see the dgpu,you could install the egpu driver without mod.anything.