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3 Posts

43983

June 5th, 2013 06:00

Dual Monitor on Optiplex 990 SF

Hello all, 

I need to use an extended display on an Optiplex 990 SF, so I installed an AMD Radeon HD6410 and connected one monitor via DVI and one via the integrated VGA. I enabled multiple monitors in the BIOS, I installed the drivers and Catalyst but I can't make it work. What happens is that I can use only one monitor at a time, if I boot with the DVI connection I can use the DVI, if I boot with the VGA, I can use that, but I can't use them together, they are not even detected. 

Any ideas why this is happening? 

BTW, I am running BIOS version A10.

Thanks a lot

4 Apprentice

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953 Posts

June 5th, 2013 07:00

Hi,

The OptiPlex 990 support either integrated graphics or add-in graphics card:

  1. add-in PCIe x16: 1GB dedicated on-board graphics frame buffer DDR3 memory with DP and DVI outputs - ATI Radeon HD6450 (OPGA8)
  2. add-in PCIe x16: 512MB local frame buffer with dual VGA or dual DVI - ATI Radeon HD6350 (OUGA8)
  3. add-in PCIe x16: 1GB dedicated on-board graphics frame buffer GDDR5 memory with VGA, DVI and DP outputs - AMD Radeon HD6670 (OHGA2)

You have mentioned you have AMD Radeon HD 6410, please check AMD Support site for specifications and dual monitor configuration of this card.

3 Posts

June 5th, 2013 08:00

Thanks for your answer, I am sorry I meant HD6450.

I have another Optiplex 990SF which uses both a Radeon HD6450 and the integrated Intel, and I can use the two monitors together. The problem is that it was not configured by me, and I can't figure out what the difference is.

8 Professor

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8.8K Posts

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35.3K Points

June 5th, 2013 19:00

I suggest the Sapphire 6450, which will support two, maybe three, monitors simultaneously.

4 Apprentice

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953 Posts

June 6th, 2013 05:00

Hi YIT,

Set up seems to be correct. Check this article from Microsoft on Dual Monitor Setup and see if this helps.

3 Posts

June 10th, 2013 02:00

Thanks I'll try to have a look and post a solution if I find one...

4 Apprentice

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953 Posts

June 10th, 2013 06:00

Hi YIT,

Please feel free to contact us if you have any further queries. We will await your response after trying the steps.

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