wow, you are very intelligent. Thank you very much. I have a question..........is there a way to disable crossfire mode if I still get these cards? thanksOriginally Posted by 'Tsunami',index.php?page=Thread&postID=162024#post 162024
at this time when you run your video cards in sli or xfire mode only one output is used. e.g. your two video cards may have 4 dvi outputs but only one of them will work. this was a big limitation for people wishing to use multiply monitors, but is a sacrifice you make when linking the two cards. Now nvidea and ati have come out with a patch that allows you to use a second output to run 2d progams. so you can have a 3d game on one monitor and surf the internet on the other. But you cannot output two 3d programs to 2 different monitors. If you want to do that, that don't run the video cards in sli/xfire.
since sli/xfire only allows you to use 1 dvi port, what you do is add all your monitors resolutions together and have that as your screen resolution. e.g. 2x 24" monitors @ 1900x1200= 3800x1200 resolution coming from that one dvi port. than the 2heads2go splits that signal up to the two monitors.
But for the OP, i really don't see any performance benefit you will get between running 2x 4870's or 1x 4870x2, or 2x 4870x2's. there are no programs on your computer that need or will benefit from that much video card horsepower, there is nothing on your computer that is optimized to run with 4 gpu's. If you did have that kind of computing need you would not be posting here, you would already know the answer. My brother owns a digital studio and a has a render farm, he bought one computer setup from toyota america that they used to design their cars.(over 100k new) and has 2 computers with the equivalant of 8 quadcore's rendering one frame of film, takes several hours to process that one frame and it takes 24 frames for 1 second of film. takes a month to render a 30 second commercial. he multiboxes on a single computer with two 260's and 3 monitors. so if there was any performance to be gained from another video setup i'm sure he would use it.
So I can tell you without a doubt that if your intentions are to multibox with the system you described, with only 2 monitors, you will not need 2 4870x2. One is more than enough. Now if you want to use 3 monitors than you will need 2 video cards not in sli or xfire. wow is not a complex program, it is designed to run on a dial up connection, so the video is kept as simple as possible.
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