Am facing weird lag issue after playing the game for 5-10mins and this happens on all graphics presets high,very high and extreme

video:

1440x900 @ extreme getting 28-30fps(after 5-10mins of gameplay)



same 1440x900 @ extreme getting 28-30fps (this time restarted the game)



u can see the gun ship to notice the lag.Its really weird because in the second video am playing on same settings,getting same fps but dosent lag.Y is the game stuttering after 5-10mins of gameplay?? pls help

intel core 2 duo e8400
8800gt 1gb gddr5
3gb ram

p.s. This lag problem persists even on 800x600 high settings @79fps

hi, i didnt play final game but i had the same problem with crysis2 demo, i was playing on 1440x900 resolution too, vsync off, the problem was there when i was playing on hardcoe and advanced, but it disappeared when i played on gamer, it looked exactly the same, it looks like game slows down every 1-2 seconds then speeds up, this problem was present even when i had 60 fps on advanced settings, but in more complicated scene on gamer when i had less fps: 45-50 the problem was gone so it's not related to fps, i didnt manage to fix it and have no idea why it is like this, maybe more people have this bug but dont notice it, firstly i thought there is something wrong with game, it just played strange, not smooth, it's easily noticeable when strafing and looking how everything else moves around - it doesnt look smooth and playing with this strange lag is just ruining experience, if i remember correctly i had this lag just after starting game, i didnt need to wait a few minutes, but as i said before on gamer there wasnt lag even after some time playing

pc:
q6600@2.4ghz
gtx260
4gb ram
win7 64bit

sys_maxfps = 40


copy and paste that to system.cfg file!!!! imma effing genious! believe it or not am playing on EXTREME baby!!! steady 40fps frame rate.wooohooo am soo happy crytek needs to add this to their patch