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Force windows to use CPU integrated graphics

Hi there,
I was wondering if it was possible to force windows to use the CPU graphics (for the operating system) rather than installed graphics cards.

I have an i7 4770k and 2 GTX 680's. The reason this comes about is because I want to have my 680's rendering and still be able to use my computer while they are crunching calculations in the background. At the moment windows operating system is using the one of the 680's for graphics so when I try to do something else it's very laggy because the 680's load is already 100%
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    in the bios set the primany display to ipgpu and under it turn on muilt monitor support to turn on the intel ipgpu. if you set the bios right the onboard video will be the main video output at post you see the bios screen and windows post. this should free up the other 680 for other work.
  2. smorizio said:
    in the bios set the primany display to ipgpu and under it turn on muilt monitor support to turn on the intel ipgpu. if you set the bios right the onboard video will be the main video output at post you see the bios screen and windows post. this should free up the other 680 for other work.


    This is the closest thing I can find, initial display output? I can set that to PCIe slots or igfx. Is that similar to what you're saying?
    I also tried plugging in my display to a video output DVI slot on my motherboard but my screen didn't display anything until windows had loaded
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