Windows 10: Why do Nvidia carsds only start a 2nd monitor after Win10 loads?

With 2 monitors connected to a 'dual-head' Radeon graphics card BOTH monitors turn on when the computer boots and I'll even get 2x motherboard BIOS setup menus mirrored on both monitors. When Windows loads they then display the extended desktop as per my Win10 setup.

With 2 monitors connected to a 'dual-head' Nvidea graphics card ONLY ONE monitor turns on when the computer boots and I get a motherboard BIOS setup menu on only that one monitor. The other monitor remains off until Windows 10 loads and will then display the extended desktop as per my Win10 setup.

I'm assuming this is normal behaviour for their respective architectures. But is there some setting on Nvidia cards that will enable both monitors in a mirroring mode at startup like Radeon cards do?

Sorry if this isn't a 100% Windows 10 graphics question. But I am running windows 10 Just thought there might be a knowledgeable person here with the right answer to this question that's nagged me for quite a while.

:)

 

windows 10 2nd display not detected

We have upgraded from Win7 system running with 2 VGA monitors to Win10 (Dutch) without any real problems. After the upgrade only one monitor was identified and the system did not detect the 2nd monitor.

We then upgraded the video card drivers to version win10/64 bits but still not detecting 2 monitors. The general message is that the hardware is not working correctly and for this reason disabled (code 43).

The video cart is an Nvidia Geforce GT430 SW version 10.18.13.5362, windows10 home, processor i5-2400, 64 bits system, 64 bits processor.

 

I am getting BSOD System Service Exception dxgmms2.sys when adding webcams to vMix software.

HOW MANY DISPLAYS DO YOU GUYS HAVE ATTACHED TO YOUR GPU? people in nvidia forums claim that their computers starts getting BSODs when they attach 2nd monitor and don't have problem with only 1 monitor.

https://forums.geforce.com/default/topic/895902/geforce-drivers/blue-screen-dxgmms2-sys/2/

 

I have on board AMD, but I use an Nvidia card. When I take my Nvidia card out, I experience the same behavior, two monitors showing identical displays. I always found that rather annoying. Personally, I do not need more than one monitor until I sign in to Windows, then I see all three of mine.

 

What I've seen/experienced with dual monitors it is a driver/program issue that the OS/Operating System controls. The OS has to finish loading before everything is set up for use. While the OS is booting the second monitor can only see what the first monitor shows, drivers not yet loaded.

 

So it seems it's just an AMD 'feature'. Both brands behave the same once the OS has loaded. fwiw I prefer the AMD behaviour as it confirms that both monitors are on and working a bootup. But it's really no problem.

I just came fishing to see if there's some hidden graphics card bios setting (or whatever) on the Nvidia that would enable/disable that feature on their cards.

 

In my Nvidia gt 730, only the HDMI connected monitor gets signal at POST. The VGA one doesn't.

 

AMD R7 260 I have turns on displays on all 3 monitors in BIOS and windows.