I know BS2 is a pretty demanding sim, but at the same time, I'm not sure I'm wringing as much performance out of it as I can. My system:
i5 2500k (4GHz)
2xRadeon HD 6970
16gb RAM
BS2 is installed on a 7200rpm drive. I've verified that the processor is running at full tilt during gameplay with CPU-Z, so I'm not being limited by that. Everything in the Catalyst Control Center profile for DCS.exe is set to performance, using the 12.8 driver. In the free flight instant action mission, I see 30 fps paused at the start--that's at about 300 meters, with no AI or physics calculations going on. Changing graphics settings has bought me about 10 fps (I get five *fewer* FPS with Crossfire enabled than I do with it disabled, and my graphics settings are roughly midrange; tree view distance is 4000m and clutter is off). That said, 30 fps in free flight means about 20 fps in a mission with a moderate number of units, which is on the very low end of the framerates at which I can control a helicopter.
Is anyone else using HD6xxx cards, or Radeon cards at all? Is it a problem with the 12.8 drivers? Are there any other tweaks I can try? I saw the post in the A-10C performance forum about graphics driver tweaks, which I've made, and I saw the tweak thread in the BS problems forum, which mostly focused on multi-monitor setups. Looking at the performance other people report, though, I feel like I'm seriously underperforming compared to how I should be.