OK, so now we know who is responsible - it is evil Ubisoft! But this epilepsy explanation doesn't solve this:

If you are installing from CD spilled some mistakes, but Steam still installed and put the game by downloading something else from the network. Folder with the game weighs 3.95 GB. Version 1.00.13716

System:
CPU: Core i5-2500K 3.3@4.5GHz
MB: ASUS P8P67 PRO
Memory: 2*2 Gb DDR3 Kingston "Hyper X" KHX1600C7D3K2/4GX
Video: CrossFireX 2*ATI R5850 1024Mb 256bit DDR5
SSD: Intel X25-M SSDSA2MH080G2C1
Audio: Creative Sound Blaster X-Fi Titanium SB0880
OS: Win7 64bit

NOT PLAYABLE

Profile video settings - average. Smoothing is "On." How to turn off completely - do not understand. Average FPS about 21-25 in a single mission over England, not in the city, as well - villages, woods in some places, grass ... Frequent dropdowns of 10-15, maximum 41. In a collision with the ground subsidence FPS to 3-4 for a few seconds. Friezes, jerks - not comfortable. On trees plane not beating, setting realistic. Significantly slows the cursor on the screen, move it is not convenient.

Processor almost doesn't run! Maximum load up to 25%!

Memory usage 70-80%

CrossFireX - does not work!

If you select the pilot was a flight no longer went there.
When you configure the video was freeze for 15-20 seconds.
Mission training takeoff not started
Steam annoying, press shift + tab, to record the FPS, and the windows of stim ...
Alt + tab does not work correctly, the full switch to Windows does not happen and the game is not minimized.

Disappointed very much. I hope to optimize the game and drivers

Sound by the way is NOT from IL2 - liked it.

original in russian here - http://www.sukhoi.ru/forum/showthrea...t=67803&page=6