One thing people forget, is that when they run benchmarks, the benchmarks are very demanding to really stress the GPU, so ingame FPS is likely going to be much higher.
That only means that the HD6990 is going to have even higher FPS when playing

http://www.amd.com/UK/PRODUCTS/DESKTOP/GRAPHICS/AMD-RADEON-HD-6000/HD-6990/Pages/amd-radeon-hd-6990-overview.aspx
Funny. You can't click on the "HD6990" when you go to AMD's site as it isn't officially released yet, however the HTML files exist so feel free to take a look
