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Windows 8 & dual video

Posted on 2015-01-14
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Last Modified: 2016-11-23
Hi all,
I have a brand new Dell Inspiron PC.  Delivering to client tomorrow.  They have purchased 2 matching monitors and the necessary hardware for a twin head setup.  My problem is that none of the 3 video cards I have installed work.  Or, at least, they don't appear to.  Without the video card in the PC, it boots the video from the motherboard just fine.  When you drop in a new card, no video from any of the 3 ports (2 on card, 1 on mobo).  I've done dozens of these setups in Win 7 or earlier, but I have to be missing something here in Win 8.  Any ideas?
Thanks,
jwhite
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Question by:jwhite273
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LVL 17

Expert Comment

by:pjam
ID: 40549904
Not familiar with Inspirons, but you should check the BIOS to see if there is a way to set video to Auto or deselect mobo video.
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Author Comment

by:jwhite273
ID: 40549912
There was a setting to set Intel multi-display, but it didn't make any change in operation.  I can give it another go.  The Inspiron is Dell's home value stuff.

Thanks
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Expert Comment

by:pjam
ID: 40549981
did you disable that?  Intel is no doubt the on board video
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LVL 5

Expert Comment

by:Aaron
ID: 40549991
Usually it should show video even without the best drivers just using generic but it might be worth it to find and download the drivers directly from the manufacturers site...

Also take a look at what the power supply is rated for. Dell's usually have tiny power supplys and they might not put a lot into the card from the mobo.

Do the cards require an additional pin connector from the PSU to add power? - Sometimes we IT folk forget about the simple things.

You can also make sure that you have drivers for the slots on the mobo (check the device manager for !). And that the slots are enabled in the bios.
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Expert Comment

by:Aaron
ID: 40550001
@pjam - question: If it was set for onboard video and he put in a card... then the port for onboard video (direct plugging into mobo) should still work right? The author said that the video does not work on any (including mobo) when there is a graphics card in. I might be wrong but that is how I always thought it worked.
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Expert Comment

by:rindi
ID: 40550120
Doesn't the onboard video already have multiple outputs? Many PC's with onboard graphics these days have multiple outputs. I'd check that first.
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Author Comment

by:jwhite273
ID: 40550165
Ok, great info.  However, the system only has one video port which is why I need a separate card.  I'll look at the psi and see what may hold.  Thanks.
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Expert Comment

by:rindi
ID: 40550214
If it only has 1 output, make sure that when you add an additional video card that it is compatible, and the powersupply can support it. Also make sure you use the correct PCI-Express slot.
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Author Comment

by:jwhite273
ID: 40550482
There is only 1 PCI-e slot on the mobo.  PSU is 300w, so I'm guessing that the system will support it.  I'm not using a beefy card, no power connection, on card fan or heat sink.
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Author Comment

by:jwhite273
ID: 40550486
More info.
With a card inserted, I get a No DVI-I cable found.  When I attach a DVI-I cable, I get the error that there is no signal from the computer.  Going to try the Intel multi display switch in the BIOS.
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Accepted Solution

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jwhite273 earned 0 total points
ID: 40550517
OK, I resolved it.  I restarted and went into the BIOS, went from UEFI to Legacy.  Also shut off Secure Boot.  Installed the video card and started the machine.  Using the video card for video, when it came up I waited til it did a boot fail and shut it down.  Restarted, went back into BIOS, re-enabled UEFI, and restarted.  Problem solved.
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Author Closing Comment

by:jwhite273
ID: 40557325
Figured it out and got lucky that it worked.  SOmeone I remember said something about UEFI and Win 8.  Just got lucky.  Thanks all.
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