I'm having the same prob on my ati 6990 but here's a possible crossfire fix

Rename your crysis 2.exe in you program files (*86)/electronics arts/crytek/crysis 2/bin32 to rift.exe

This fix worked for me thanks to mysteriomp & twisted 89 my game is fully playable

http://tehparadox.com/forum/f18/crysis-2-crossfire-flickering-*fix*-1813331/

rename it to bioshock.exe is faster for me but still not using all my gpu's..

Thats stupid.

This fixed the issue for me. I haven't checked to see how the GPU usage is on my 5870s in Crossfire. I'll try bioshock.exe next.

If you name it PatchthisPOS.exe it will even double your gpu's!

The amd profiles update worked for me. The flickering is 98% gonzo.

These fixes work for me, but my framerate is cut nearly in half. Not what I'd call a fix.

I got the steam version, can't rename the executable.

I was getting same problem with my 4870x2 card, with crossfire enabled and latest ATI drivers. I ran multiple test without any good result until I downloaded "Radeon Pro" at http://www.radeonpro.info

I made a new profile with my crisis 2 game, I've check in advanced Catalyst AI and set it to "normal". After it's done, go into Tweaks tab and force que CrossFireX Profile to Bioshock. Apply your settings by right clicking though your Crysis 2 profile. You can set some other tweaks by auto-disabling Aero and always forcing v-sync off, it help a lot on FPS aswell.

Launch the game by right clicking on your profile. Enjoy your CrossFire enabled and fully functionnal.

I was running at 44 average fps with miminum "high" setting and now i'm able to play on extreme settings at average 75fps.

I got the steam version, can't rename the executable.

I was getting same problem with my 4870x2 card, with crossfire enabled and latest ATI drivers. I ran multiple test without any good result until I downloaded "Radeon Pro" at http://www.radeonpro.info

I made a new profile with my crisis 2 game, I've check in advanced Catalyst AI and set it to "normal". After it's done, go into Tweaks tab and force que CrossFireX Profile to Bioshock. Apply your settings by right clicking though your Crysis 2 profile. You can set some other tweaks by auto-disabling Aero and always forcing v-sync off, it help a lot on FPS aswell.

Launch the game by right clicking on your profile. Enjoy your CrossFire enabled and fully functionnal.

I was running at 44 average fps with miminum "high" setting and now i'm able to play on extreme settings at average 75fps.

^^^^this works for crossfire ppl

Ah, thank you!!

I, too, had the Steam version, so the "rename it to use the Rift profile" trick wouldn't work for me. This should work, at least until they release a patch fix, or ATI releases an updated Crysis2 profile.

i also have steam version, but you can copy the original exe and rename the duplicate whatever you'd like, and it still opens, you might have to launch it as admin though, i think it all comes down to the r_multigpu command not being implemented or even checked against. Hopefully this will have a quick fix, because even with changing the crossfire profile it's using i still get some flickering on maps like skyline, the bioshock did work okay for me on single player though.

The RadeonPro util does not seem to work with the STEAM release of Crysis.

I can confirm the radeon pro solution works with steam version, u just need to launch it from the radeon pro window

i can also confirm that radeon pro works with the steam game

the flickering is gone, all looks normal
HOWEVER ,

the performance increase is only about 50% . (With flickering you'll get almost 100% performance boost) , so it's NOT the perfect sollution.


start level
, no crossfire 40-60 fps
crossfire with flickering 70-100 fps
crossfire with radeon pro 55-75 fps

I just wanna say that I'm also getting the same flickering problem even though I don't use Crossfire. I have ATI Radeon HD 4870 X2 (so the problem is also there with multi-GPU cards) and I have the same flickering problem and fixed it by renaming Crysis2.exe into Rift.exe but with a significant drop in framerate. I'll try the Radeon Pro solution for now but Crytek/ATI need to fix this ASAP.

...I'm also getting the same flickering problem even though I don't use Crossfire. I have ATI Radeon HD 4870 X2...

FYI, that card has a Crossfire chip/circuit built-in, so you are using Crossfire. (I am using that card as well.)

Just for people looking, here is a quick list of the ATI Crossfire flickering workarounds:

1. Disable Crossfire (check the "Disable Catalyst A.I." box in CCC)
- Easiest workaround, but limits performance to a single GPU

2. Rename the "Crysis2.exe" to "rift.exe" or "bioshock.exe"
- Requires the Crossfire Profiles for those games (found at the ati.amd.com site)
- Steam users can't do this

3. Roll back to v1.0 (either copy Crysis2.exe from the disc, or uninstall/reinstall without internet)
- No multiplayer this way

4. Install the RadeonPro tool, and use the Bioshock or Rift profile.

If you name it PatchthisPOS.exe it will even double your gpu's!
Lol nice one dude i second that notion got my spec edition a day early but still can't play it because of a lame bug i mean come on crytek how many peeps have sli/crossfire this is insane.
I can't figure out how disable my second gpu on my 5970 card so i have a game i paid good money for
and it's useless.

Nothing worked. I tried changing the .exe to rift or bioshock and that helped a little but the flickering was still unbearable. I also tried that RadeonPro tool and that didn't help. It's sad that the game that was suppose to showcase the PC's strength doesn't even work with multiple GPU's.

I've got a Radeon 5970 and I've also had the flicker problem, dropping the detail level down and turning v-sync off made it worse!

However I found that running it windowed mode as opposed to full screen (by using alt+enter, trying to use the fullscreen off option in the graphics menu didn't seem to work) worked perfectly with no flicker and both gpu's at 100%. I dropped the resolution down to 1920x1080 from 1920x1200 so the top and bottom are completely on the screen and moved it so that the very edge of the window hangs over to my 2nd monitor (though I'm sure this should have no probs with 1 monitor either).

Until there's an official fix, this is definitely the best option imo.

Using 2 x HD 6870.

Steam copy. Works for me using the Radeon Pro method.

Performance varies between 40-60 fps.

Hi...
I have crossfire With two 4870x2 and one 9800gt for physx with three monitors 3840x1024 and badly badly 15 20 fps

With BBC2 120 fps

Hi

to fix the flickering - here`s a quick fix - ATI Only

go to Catalyst control panel - performance - Gaming ( i think i am at work not on my pc nvidia card here)
Disable AI Catalyst (or something like that)

i bought the game today did not install yet but it worked on my leaked beta.

Say thanks if it works

It's not really a fix since it just disable crossfire

Realy - is that what it does - it worked on my 5970 on the Beta (so it disabled 1 core?)