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2 4870s in Xfire and Crappy GPu Possible?

Last response: in Graphics & Displays
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June 15, 2010 12:28:08 AM

Hello, I am trying to create a triple monitor setup using ATI cards while still having crossfire enabled. I was hoping it would be possible for me to have my two 4870s in Xfire (supporting 2 monitors) and a random Gpu (most likely crappy) supporting the 3rd. Is this possible? If not, any other suggestions?

More about : 4870s xfire crappy gpu

a c 202 U Graphics card
a b C Monitor
June 15, 2010 12:35:04 AM

What motherboard do you have? Do you already have both 4870s? You can use a third GPU to support additional monitors, but you need to make sure that your motherboard can accommodate 3 GPU.

If your motherboard cant, you can switch it for 2 5770s in CF or a 5870, they will perform about the same but will allow you to use 3 monitors, but one of them will need to be display port or you will need an active adapter.
June 15, 2010 7:19:01 AM

hunter315 said:
What motherboard do you have? Do you already have both 4870s? You can use a third GPU to support additional monitors, but you need to make sure that your motherboard can accommodate 3 GPU.

If your motherboard cant, you can switch it for 2 5770s in CF or a 5870, they will perform about the same but will allow you to use 3 monitors, but one of them will need to be display port or you will need an active adapter.


I have a Gigabyte that has 2 PCIe 2.0 x16 slot, one PCIe 2.0 x8 slot. I have the 4870s two running at 16 (currently) but with 3 they would all run at 8x.
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a b U Graphics card
June 15, 2010 9:02:45 AM

8x is plenty of bandwidth for a 4870, no worries there.



As you can see a 5870 doesn't get too significant of a performance hit from even x4!

June 15, 2010 5:49:14 PM

Maybe I'm missing something here, but why can't you just connect 2 monitors to 1 card, and 1 monitor to the other?

I had a dual card Crossfire setup with 1 monitor on each card and it worked fine. Is there some Catalyst restriction on Crossfire and two monitors?
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