Originally Posted by 'Xar',index.php?page=Thread&postID=208070#post2080 70
Sorry, been a while since I've seen this thread so didn't see your reply Lax. What I mean is XP has a "span" mode where it makes one big desktop based on width of monitor 1 + width of monitor 2. So windows has just 1 huge virtual display, the taskbar spans across both monitors and it's highly annoying when alt-tabbing because the alt-tab box is right in between both monitors. The span mode works best with 2 monitors of the same resolution.
In XP dualview (as opposed to span), where each monitor can have it's own resolution, xp falls down and the framerates are horrible.
In Vista there is no span mode but dualview was fixed...until adding another of the same card and going to 3 monitors.
I believe someone said that they were able to run 3 monitors on 2 cards without lag but only when one card was from Nvidia and one from ATI.