i'm experiencing heavy lag during gameplay...not all the time..but when it happens it lasts for a while and it makes the game unplayable..
PC Specs:
AMD 6870
Core i5 3470
8GB Ram
1.5 TB HDD
and to be informed...i play Crysis 2 multiplayer at Extreme settings without a single lag

When you load the game after the opening credits and the login and password from the originals, see the main menu of the game and all ...
Game freezes after a while (about 15 seconds), the screen flickers and is a black screen. Background music playing, the mouse moves, but the game menu, and something no other.
Reinstall drivers for the video card 12.10, does not help: (

PC Specs:
AMD Phenom II x2 555BE 3.2 GHz
Asus M5A97 Pro
8 Gb RAM
HD 6930 2Gb
HDD WD 500 Gb
OC Win7 sp1 x64