HD 4870 Dual display resolutions

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mathieumg

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May 8, 2006
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Can I use a 1920x1200 and a 1280x1024 displays with this card? (I would only game/watch movies using the 1920 one).

I'm confused because of this: http://ati.amd.com/products/radeonhd4800/specs.html

"Two integrated dual-link DVI display outputs
Each supports 18-, 24-, and 30-bit digital displays at all resolutions up to 1920x1200 (single-link DVI) or 2560x1600 (dual-link DVI)
Each includes a dual-link HDCP encoder with on-chip key storage for high resolution playback of protected content"
 
Tell us more background information. Are you trying to extend your desktop or are you trying to clone your display?

With extending, what your trying to do, should work. Cloning only allows both displays to run the same resolution.
 
I'm trying to extend it. I know it is possible (I'm using 2x19" on my 7600GT at the moment), it is just that this thing on AMD's website put confusion into my head as wether I'll be able to run my 24" @ 1920x1200 and my 19" @ 1280x1024 all at once on only one HD 4870, or not.
 
What that bit means is basically that each port can handle a resolution of either 1920x1200 or 2560x1600, depending on if they're single or dual-link DVI. Since the 4870 has two dual-link ports, you can run two monitors at resolutions of up to 2560x1600 on each. Anything lower such as what you intend to do is obviously possible as well.
 
Now I understand the difference! Thank you very much Zero82z! I am getting a second 4870 in a year from now, I should be able to run 3 monitors at once, once put in Crossfire, right?

Also, should I rather wait for the 4870x2 or the 4870 is good enough? I just dont like the sound of 512mb, sounds low compared to what nVidia has been doing.
 
You can run a maximum of two monitors while using Crossfire. However, you can disable and enable CF through software, so you could run three monitors for general usage and switch on Crossfire while losing the third monitor when you want to play a game.

As for the 4870 vs. 4870X2 debate, that's a different story entirely. I suggest you have a look at some of the other threads in this forum, as to be honest it isn't really worth it for me to reiterate all the points when there's a lot more information floating around here.
 
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