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How to set up two graphics cards

Last response: in Graphics & Displays
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December 4, 2011 3:00:10 AM

Hi Tom,

I have two ATI HD3870 video cards, both have 512 of ram, and my system originally can with Vista. As soon as Win 7 came out I installed Win 7 and got the latest and recommended video drivers for my graphic cards.

When I run a diagnostic on the cards it tells me that One of the cards is a master card and the othe is a slave. I am supposed to be running at 1GB GPU speed, however when I run more benchmarking tests, It tells me that I only have 512 ram installed?

I recently found this out the hard way when I tried to run Battlefield 3, Can you please tell me how I can get these cards to run together.

Thanks for your help in advance!

Regards

John

More about : set graphics cards

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a c 153 U Graphics card
December 4, 2011 3:04:05 AM

When you have two cards in CF (or SLI), the RAM doesn't not get added together like that. You are only supposed to have 512mb of effective ram.
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December 4, 2011 2:12:37 PM

Best answer selected by WarCannibal.
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December 4, 2011 2:12:41 PM

Thanks Guys , is there any way to get the cards to run at 1GB GPU speed? and if it possible, will I get better performance? Thanks in advance!
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