Problem
-after starting up the game, it's smooth as can be, sitting at 60fps (somewhere is capping it there) and everything is dandy (except multiplayer which is it's own problem lolol). After about 5minutes the fps drops a bit, and around 10 minutes it is nearly unplayable, sitting around 2-10 fps. I am not experiencing a "flicker" problem, like that 22 page thread refers to, but I have followed almost everything in there to try to fix my issue.
-stats during problem, roughly 10 fps (about 8 minutes in)
#0 Core ROP 626 MHz
#0 Core 1350 MHz
#0 Mem 1053
(exact for core #1)
#0 temp 70'C
#0 ambient 64'C
#1 temp 61'C
#1 ambient 57'C

Edited Note:
It's input lag, I can sit there and watch flames burn, enemies fire, planes fly around just fine. But moving my gun is choppy as all hell (the longer it's on). Anything I do, it shows as choppy, but anything I see is fine. If anybody else has input, even just more reassurance of, "It's the game; needs patching" would be great.

Things I've tried
-Installed Nvidia profile update 7
-" " EVGA profile update that lists Crysis2.exe
-latest beta driver from nvidia site
-earlier driver version supported by evga's profile update
-custom profile for global settings changing sli rendering mode to FAFR2
-widowed mode simply disabling SLi

(All of these showed little to no change in length of time it takes to massively drop fps and force me to restart the program.)

System
-Win7 Ultimate 64x
-Intel i7 920 @ 2.67GHz (factory) running around 60-65'C
-Dual Nvidia GeForce 448bit GTX260 896MB DDR3 running average of 65-70'C(under load) (factory)
-6 Gigs ram

Bottom Line

I've tried all different drivers, profile updates, trying to get SLi to work (still not 100% on how to tell if it is functioning, I am running RivaTuner and a Windows GPU Gadget and #1core is always 626ROP while #0 is 301ROP, not sure why one gpu is fully loaded on the desktop ?_?) and nothing seems to change this issue. Again, no flickering, just overtime fps drop.

I originally assumed it was heat, I have a new CPU fan / heatsink on route, but other games, on high settings, running all day, in this hot room, never cause an issue. From what people have recommended, something with Crysis 2, is overstressing my rig, when it shouldn't. Anything else I should try or just sit in the corner aboard the, "waiting for patch kthxbai" boat.

Sounds like a VRAM leak / RAM leak to me.

If it is, there's no way to fix it without a patch

Edited main post. Updated with a more specific description of the problem.

Can anybody give some more feedback? Anything that may help a memleak if that's the cause? I haven't found anybody else with this sort of problem. : (

Thanks!

Had same problem a day ago. Game runs smooth on Extreme settings with Advanced config and everything on max, then it freezes for 0.5 sec and I gt only 20 FPS untel I reboot infact cooling is nice.
The problem comes from past and for me it was the infamous "Display driver nvlddmkm stopped responding, and has succesfully recovered" which terrorize nVidia card users for like 4 years straight. However I fixed it myself by deleting all nVidia tools (autoupdate, OC panel and drivers itself) then rebooted and let Windows instal it's defaul driver complitelly, then I rebooted again and reapplied latest driver again. That fixed it for me. Also make sure to reset driver setings to defalut then promted during installation.

Memory leak is less likelly because graphics were dumded down greantly compared to Crysis 1 and there is simply no way to overload memory. On my x64 Vista Crysis uses just 1.5GB of 6GB of RAM avalible to it.

I know if I have a web browser open with flash content (was using video guide for locations), the fps drops quiet a bit. So make sure you do not have a web browser open. I was scratching my head to trying to figure it out. Not saying this is what is happening to you but it is a possibility.

I know if I have a web browser open with flash content (was using video guide for locations), the fps drops quiet a bit. So make sure you do not have a web browser open. I was scratching my head to trying to figure it out. Not saying this is what is happening to you but it is a possibility.
Current version of Adobe Flash player may downclock your GPU to 400Mhz while you use flash player. To prevent such behavior just disable "Hardware acceleration" in Flash settings.

That's the first thing I tried. I must of not did it correctly, because my FPS still dropped with hardware acceleration disabled. This is in Chrome where flash is built in.

I've had driver failure / crashes a lot in different games. this isn't a one-action issue, it's a gradual decrease in input smoothness, then overall fps loss, then once fps starts dropping there is less then a minute to exit the game before it gets too unresponsive to really do anything. I'll try to clear out my drivers and get the latest, since it seems the new / beta drivers / profiles only fix SLi issues, and this isn't an SLi issue from the best I can tell SLi is working. (SAME exact problem when I try in windowed mode)

Very frustrating, I just reinstalled and same problem persists. I can't find anybody else with this issue. Just about 5-10 minutes in the FPS drops dramatically, with cooling not seeming to be an issue at all. Sigh. Anybody else have any ideas?

Have u sweep ur driver after u use the beta version? And ur vsync on or off?

I have the exact same problem you have. SP runs smoohly at extreme 1920x1080 on my modest PC but MP starts lagging after 5 min. Someone please help.
PC config:
Core2Duo 2.2Ghz
4GB DDR2 RAM
ATI 4770HD 512MB

Same problem, SP smooth 1920x1200 on Extreme, MP most likely leaks memory and starts lagging after 1st game.

My PC config:
Amd Phenon X4 965+ 3,4Ghz
Nvidia Geforce GTX470, drivers both 266.58 270.51 tested, no reaction
4GB DDR2 Ram
Running on Win XP.

My thread about this issue:

http://www.gamesas.com/forums/viewtopic.php?f=40&t=21279

bump?

Very frustrating, I just reinstalled and same problem persists. I can't find anybody else with this issue. Just about 5-10 minutes in the FPS drops dramatically, with cooling not seeming to be an issue at all. Sigh. Anybody else have any ideas?

Even though it's been dumbed down, the extreme settings thrashed my gtx580 gpu, the vram usage was about 800mb(this was before the latest nvidia driver), it was fine when overclocked, - i imagine the first few mins are not very graphic intensive, not much happening which is why your setup can take it fine, 260s, although classic(i have one too) are getting on in years, even SLIed.
I'd rather two 560s.

Thank you for your input but this problem happens around the same time frame no matter what, I can be creating a kit for multiplayer, or staring at a wall in campaign and within 10 minutes it all gets too choppy to work with. : /

I had problems of the game crashing then framerate dropping drastically and found a really good solution.

I lowered the maximum pre-rendered frames for specifically this game (through the NVIDIA control Panel) from 3 to 2. Since last night, the game hasn't crashed and my PCI-E bus stopped slowing down from v2.0 to 1.1

Using GPU-Z check if your PCI-E bus is running @16x 2.0 not just 16x. If it slowed down, then you have the same problem as me.

Yeah the problem is real, is a memory leak, it reminds me of dragon age origins memory leak.

The only way to fix this:

-make more threads about this issue, and fill the thread pages, to let the mods see the problem
- more and more complains, make this issue popular