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Setting up two graphics cards on a Dell Vostro 430 (Windows 7)

This has been done on other Vostro 430's before and I was able to get it working on a Vostro 430 running WIndows 10 before starting on the Windows 7 machine...but now it won't work!

The PC is a Dell Vostro 430 with an NVIDIA GTS 240 installed. The user wanted another display added so I chose a spare ZOTEC NVIDIA GT 610 card which has a PCIe x1 connector.

Plugged in the card and as expected the drivers weren't working (Code 43), so I uninstalled all the drivers and started fresh.
I have the install files for these two cards which were used on another Vostro 430 with the same configuration and thought it would work.

But now, no matter what order I install these drivers in, Windows is not installing the GTS 240, which is the original card it had in the first place! It is only seeing the newly added GT 610.

Unfortunately, at this point the user needed his PC back so i couldn't continue troubleshooting.
My next step was going to be to try finding an NVIDIA uninstaller software to completely clean out all drivers and then try the two driver installs which I have.

Anything else which I should check?
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SeeDk
Asked:
SeeDk
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1 Solution
 
Scott CSenior Systems EnginerCommented:
I've always found out when using multiple video cards, everything works better if both cards are identical.

Can you get another NVIDIA GT 610 card ?
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SeeDkAuthor Commented:
Not an exact one, since the Vostro doesn't have another PCIe x1 slot.
If a PCIe x16 one would work better together with PCIe x1 card, I could purchase one.
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SeeDkAuthor Commented:
It's fine now. I removed all drivers, installed a confirmed working one, and booted the PC with only the old card. It worked.
Then put in the new card together, it booted only to the new card.
Then booted again but this time with having the displays connected only to the original card.
It boots from the original card, and then I plug in the 3rd monitor to the new card, it works.

I'm guessing this is something wrong with how the BIOS is seeing the cards. I saw this before on another PC and flashing the BIOS took care of the problem but I'm reluctant to do that now due to the potential problems it could cause.
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Scott CSenior Systems EnginerCommented:
Glad you found your answer.  Thank you for posting the solution.
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SeeDkAuthor Commented:
Found solution on my own.
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