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add a second video card

01010101

OSNN Junior Addict
#1
PC: Dell optiplex gx260 / winXP Pro

1. onboard video card - Intel 82845g/gl/ge/pe/gv graphics controller
2. AGP video card - ATI rage 128pro ultra GL

Only the AGP video card is installed after installing XP Pro from a scratch . The onboard card is not even listed under the device manager nor unknown device.
If I pull the AGP out of its slot, the onboard card would be recognized and installed. Put back in the AGP, then the onboard card disappears under the device manager.

I checked the bios and found the following settings that could relate to video card:
- primary video controller..........auto
- video dac snoop ...................off
- onboard video buffer..............8mb

I changed the primary video controller to AGP/onboard but still the same.
 
Last edited:

Shamus MacNoob

Moderator
Political User
#4
No I am not wrong , you can have a card with 2 outputs and you can have 2 cards one AGP and one PCI even .. but you wont get that with on board as soon as you add a card it cuts off the signal to the on board ..
 

fitz

Woah.. I'm still here?
Staff member
Political User
#5
i'd have to agree.. I don't believe you can use use the onboard as a 2nd video card.
 

Aprox

Moderator
Political User
#6
I will reiterate as well, you cant use both onboard video and a video card at the same time. Regardless if its PCI, AGP, PCI-E. Your best bet is to just buy a video card that works with your system that has dual heads.
 

01010101

OSNN Junior Addict
#7
No I am not wrong , you can have a card with 2 outputs and you can have 2 cards one AGP and one PCI even .. but you wont get that with on board as soon as you add a card it cuts off the signal to the on board ..
My bad, that was it :laugh:...my friend have PCI & AGP video cards installed not onboard.
thank you McNb

i'd have to agree.. I don't believe you can use use the onboard as a 2nd video card.
you think you know everything?????? I don't believe you.
 
Last edited by a moderator:

Racer_600

OSNN Junior Addict
#12
Then how did I use the onboard and PCI video card at the same time?
It was an old IBM Aptiva, 350 mhz. I put a 16 meg Voodoo card in it as an upgrade and then took it to work where we had a few monitors on the desks so I had the idea of plugging on both to see what happened and it worked. I'v been using multiple monitors since then. Although I got rid of that IBM many years ago.
Maybe things have changed since.
Matt
 

Shamus MacNoob

Moderator
Political User
#13
Not sure how you did that, but my personal experience has been that as soon as we add a card the onboard cuts out, but something old like that IBM maybe that was an option back then ...but they figured hey lets make them pay for a second card :laugh:
 
#14
The newer MB's autodetect and default to the Bios settings. I have not seen one that allows "both". It's usually auto, MB, or AGP.

Using a "PCI" on board and a "PCI add in" might work. It's just a question of if the Bios and drivers can handle the interrupts. Having a common vendor would help (intell/intel, ati/ati).

I don't think AGP supports two GPU's so if the MB is AGP, a PCI card might work.

I have a pcchips MB with built in video and a spare video card sitting here in front of me, but man that sounds like work... Maybe latter.

Update:
The PC CHips MB would not recognize the on board video (AGP) if a PCI was plugged in and the bios offered no options for video source selection.
 
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