On Mar 28, 2013, at 19:08, John R Pierce wrote:
actually with newer systems, the hardware does allow you to use builtin and pci-express video concurrently. I had 3 monitors briefly on my home (MS Windows 8) system, 2 were on a Nvidia GT640, the 3rd was hot plugged into the onboard (Intel i5-3570k HD4000) and it just came up as another screen without any intervention or even rebooting.
Everything I've googled lead me to believe this wasn't possible. I did stumble across an interesting setting in the BIOS yesterday (which I cannot find today) that implied something along these lines, but it stated that it should only be used for Windows 7 and would have no effect on other operation systems.
When I plug in a monitor to the on-board VGA output and the PIC video card, the BIOS won't let the system boot. I will try the hot-plug trick to see if it works for me.
Alfred