Guide: How to use 2nd GPU for rendering while other GPU + display
Wanted to share how I finally solved a problem I have had trying to use a discrete GPU for processing while having your display connected to the onboard igpu. In my particular case because I couldn't fit my MSI Gaming X 1060GTX in a small HTPC or in my case my Carbide 240 I had to vertically mount it and only had room to expose the hdmi and DP connectors up top such that my Oculus is hooked up on the hdmi connector and my monitor is connected to the back on the onboard Intel 630HD DVI port. The problem here is some apps or games will use the iGpu as opposed to the Nvidia 1060GTX prefered GPU despite even setting a preferred GPU via Windows Display Graphics settings on a app by app basis.
Trying to benchmark using 3dMark would use the iGpu and weirdly enough Heaven benchmark would work with the Windows preferred gpu solution but that was the exception than the rule. This was with Windows 10 Pro Insider preview 18305. So how do we get it to work 100% of the time with every app?
Well your going to need a couple things. 1. A dummy terminal plug hooked up to the discrete gpu (I'm using a displayport adapter) and 2. Display Fusion software. 3. Afterburner for monitoring gpu usage to verify its working.
After the dummy terminal is installed you can merge your main display and the dummy display in Display settings so that both screens are cloned and that your discrete gpu gets activated. Also got to set your iGpu's screen as primary. The dialogues after doing that will get lost. You have to use DisplayFusion to hit 'Winx-Ctrl-X' to bring back the window apps when they get lost on the other screen onto your primary screen.
Now when ever you launch your apps they will use your discrete gpu and output the video onto your primary screen via the iGpu!
Going to clean up this guide later a little more. If anyone has ideas please add comments of your experiences.
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