I play ut3 EXCLUSIVELY. I run a 6990 now with a simple w2252 LG (1680x1050). (I really like this TN) I plan to upgrade with 2 more thin bezels soon. Maybe to 5. I really need to see about the bezels thing first. I see zero issues, as I think I can deal with it.
My saph 6990 CANNOT do max everything with UT3. I get artifacts. Now it does play very smooth and awesome, until it gets VERY busy. Especially on big maps. UT3 is VERY fast.
The other games with fancy leaves, and, fancy details, well you can have fun with that. I LOVE fast paced FSP games. UT3 is king. But with an OCed 930 4.2, MSI bg bang, Mushkin @ 1600, Intel SSD, Corsair 1000w, MS win 7 machine, MY HD6990 cannot do it, full everything. Period.
Maybe, with the extra LCDs, especially at other resolutions, I don't know. My machine rocks. Dont get me wrong. Just not at very high settings.
All of my reports from 3Dmark etc report very good results, all around. If anyone has any input as per my setup. Or, Qs, Please, feel free to ask. Input will always be taken with best thoughts.