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Ati crossfire can u use 3 monitors with dual cards

Last response: in Graphics & Displays
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August 14, 2012 10:21:49 PM

hi iv got to 2 sapphire 4870 1gb with ati crossfire and 3 lg 23in monitors they work find on desktop
but cannot get them to work on cod4 i known that u can run 3 monitors on cod4 :( 
August 15, 2012 7:01:58 AM

Eyefinity is kind of goofy. You can run 2 monitors off any port you want but when you get into 3+ monitors, it gets weird. You can plug the first 2 into any port you want, but all the rest have to be plugged into a DisplayPort port. Now, after some Googling, I have found out that your card's connectors are 2 DVI's and 1 S-Video, and that your cards aren't Eyefinity capable, so they can only run 2 monitors at the same time. You are right in that COD4 can utilize 3 monitors, but your cards cannot.

Sorry! If you want to use them both, you'll have to uprgade your cards.
a c 191 U Graphics card
a b C Monitor
August 15, 2012 7:04:47 AM

Not sure if the 4870's support Eyefinity.
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a b U Graphics card
a b C Monitor
August 15, 2012 7:30:30 AM

HD4xxx series cards do NOT support eyefinity. The only way you're going to be able to run 3 monitors with those cards is to disable xfire. Eyefinity supported cards are from HD5xxx series up.
August 15, 2012 11:42:48 AM

chunky-1 said:
hi iv got to 2 sapphire 4870 1gb with ati crossfire and 3 lg 23in monitors they work find on desktop
but cannot get them to work on cod4 i known that u can run 3 monitors on cod4 :( 

hi again thank you for the help iv desided go get newer card xfx radeon hd 6790 which has eyefinity and xfire so i can do it what i wanted do hopfully :non: 
a c 191 U Graphics card
a b C Monitor
August 15, 2012 4:57:33 PM

I wouldn't buy the 6790, there are much better cards to buy out there on that budget, like the 6850 which would perform better in Eyefinity.
August 16, 2012 11:17:54 PM

thank you all who has had there say i had get xfx radeon hd 6790 just set it up no two
montors eyefinty that moment just waiting for adapter for display port to come then il setup on 3monitor id bought the card it before you posted deemo 13 hank s all
a b U Graphics card
a b C Monitor
August 17, 2012 8:42:26 AM

chunky-1 said:
thank you all who has had there say i had get xfx radeon hd 6790 just set it up no two
montors eyefinty that moment just waiting for adapter for display port to come then il setup on 3monitor id bought the card it before you posted deemo 13 hank s all

Make sure that the displayport adapter is ACTIVE. Passive adapters do not work with eyefinity.
August 17, 2012 9:28:30 AM

hi yes it is active thank you
a c 191 U Graphics card
a b C Monitor
August 17, 2012 9:45:49 AM

Good.
a b U Graphics card
a b C Monitor
August 17, 2012 1:24:36 PM

While you already have ordered the new cards so its kinda to late, but technically you could have run all 3 monitors on your 4870's. Before EyeFinity was official I was doing the same thing. I had 2 4850's. While they dont support EyeFinity or more than two monitors each, if you disable crossfire you can run 3 monitors. If you want to game on all 3 screens you then use software called SoftH (google it). It basically lets you do the same thing as EyeFinity but across multiple cards. While its nowhere as good as Eyefinity in terms of setup and ease of use, it does work.
August 21, 2012 1:10:54 PM

Deemo13 said:
I wouldn't buy the 6790, there are much better cards to buy out there on that budget, like the 6850 which would perform better in Eyefinity.

i again you was right about :cry:  6750 it had to go back wast of time now im getting sapphire 7850 2gb gddr5 :) 
August 31, 2012 12:00:19 PM

:bounce:  sapphire 7850 2gb gddr5 daul x what a card i cannot hear it a all great card running 3 monitor with no pro very happy with it :bounce: 
!