lau1406

Uninstall existing NVidia drivers, then use DDU to clear out any driver remnants. Install latest NVidia desktop driver ensuring you check the 'clean install' option.

Thanks for the reply. Unfortunately that didn't work. I uninstalled using DDU while in safe mode and installed version 347.25 after reboot again in safe mode.

Don't think its going to work in combination with the eGpu

Hmm so the 650m is no longer running. In 3D options in the nvidia control panel there is an option towards the top for GPU selection. Make sure it is set to "high performance Nvidia".

I already tried that, and thats whem I found that I cannot open Nvidia control panel because it gives the error message saying that there is no monitor connected to the gpu

This is an odd situation that is hard to answer, but I do not think you can have both cards render at the same time. Windows will ask you to select a primary display, and the gpu associated with that display will be the one that renders. With the internal screen set as primary the 650m should render both screens, and with the external screen as primary the 6850 should render both screens.

Your error in the Nvidia control panel is normal. Technically the HD 4000 is running the internal screen, but the 650m is feeding it all of its data and thus is doing the real work.

To switch between which card your system will use though, all you have to do is change the primary display. Both screens will always be displaying an image unless you set otherwise.

You may be able to set one screen as primary, launch a game, then switch to the other screen as primary, then launch another, and I think then that both cards will be running simultaneously. The first game might just crash though.

Thanks for your answer.

The weird thing is that when I have my LCD set as primary screen in windows and I run the Bioshock Infinite build-in benchmark, low preset full-hd, I get around 15 fps average, while before with the 650m, before I installed the eGpu, I got around 40 fps. And msi afterburner say that my iGpu is at 100% load. edit: Same for BF4

I'm new to the whole eGPU stuff. I recently bought a EXP GDC Beast for my laptop.

Now I have it all connected and all working. But I still have 1 question and cannot seem to find anything on it specifically. Is it possible to still use the Nvidia dGpu for the LCD monitor of my laptop and the AMD eGpu for the external monitor? Currently only my Intel HD graphics is driving the LCD and when I open the Nvidia control panel I get an error saying I need to connect a monitor to the gpu. All Gpu's are enabled in device manager and MSI afterburner also recognizes them all.

Specs:

Acer aspire V3-771G

Intel i5 3210m

iGpu: HD 4000

dGpu: GT 650m

eGpu: HD 6850, connected with a EXP GDC Beast and according to Gpu-Z and CCC a 1x 2.0 link.

Thanks in advance for an answer.

(sorry for any spelling mistakes, English is not my first language)