Environment mapping is not something everyone should use in combat anyway, but I think AF is since it could make the difference between seeing a fight in the distance or the dots being obscured in shimmering tree lines. For that matter there are a lot of graphic options that are nice to be able to use, but that don't mean anything in combat.
Do you know specifically which motherboard Bodhi is talking about? I ask because it could make a much bigger difference than which graphics card he chooses.
As far as EM goes along w/ combat is in terms of wanting "realistic" environment mapping of an object's surface (a plane in this case) to the visual eye (surface detail, resolution & light reflection, etc). The only "advantage" of this mapping during combat will come w/ planes that were historically used w/o a painted surface as those planes are MUCH harder to detect relative to painted planes when they are attacking from a realistic position....like coming out of the sun. The "disadvantage" of this is when a plane w/o a painted surface is trying to fly NOE as the EM will give this plane's position away due to the light reflection being mapped thus making the plane visable on the deck to anyone who is using EM & is within the maximum viewing distance range........................

But for this to be relavent you DO have to have EM enabled & in use..........................
......& the necessary hardware to use it & still maintain decent FPS to maintain good gameplay. Just remember when you cry for graphical realism you might get it........

Just thought I'd mention this. Now back on topic........................
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I also agree w/ Chalenge that the mobo itself may have as much to do w/ SLI/Crossfire issues as the cards being used & recommend looking into that side of the issue to make sure that all is adequate to properly perform in SLI/Crossfire w/ your current cards before looking at other vid cards. Just to mention a couple of items, 1.) is memory/memory bus configured for dual channel instead of single channel, or 2.) the latest mobo BIOS that may contain some improvements/fixes for SLI/Crossfire performance or compatability................
..just saying...........
FWIW I also would suggest to go w/ the best single video card setup you want/can afford. Anything from a 280/770 up should get you where you want to go......depending on what you deem as important to you in terms of graphics & system performance.
Hope this helps you out.
