Possible cause for concern for AMD/ATI Crossfire users.

[TonyD]

ICDP: +1 (bit of an inane comment, that ). Before this turns into another Ati/nVidia flame war; I build game stations as a hobby, and have never found an appreciable difference between the two. It takes nit-pickers like THG to examine the finer details of AA performance or image quality that 99% of users would never notice.

I personally have not had any difficulty in running this game after the first beta patch release, but then maybe I’m just lucky. Not using multi gpu’s is a benefit at the moment, but this issue is likely to be addressed sooner or later. I haven’t had the chance to try the latest patch yet, but will post my findings when I do.

[W0ef]

Did Anyone try RadeonPro yet?

http://www.radeonpro.info/en-US/

Featuring basic 3D controls for everybody's use and advanced controls like Scripting, Driver Compatibility feature, Compabitility profiles for Anti-Aliasing and CrossfireX, allowing advanced users to automate tasks like overclocking before gaming, and things not possible before like forcing Anti-Aliasing on games not yet supported by the Catalyst driver. RadeonPro can also help CrossfireX users to force multi-GPU utilization in games not supported by the driver, improving your games performance with a few clicks.

Basically what it does is let you apply CrossfireX profiles made for other games and use them for CoD.

If you check the site for the latest 11.4 WHQL drivers ( http://sites.amd.com/us/game/downloa...win7-64.aspx#1 ) you can see several CrossfireX profiles have been added which resolve Negative Crossfire Scaling for several games like Test Drive and stuff, I wonder if applying one of those to CoD would help but I don´t run Crossfire myself so Im not able to test it

[Kankkis]

Thats true you can get some more fps when use gameprofiles, but at this state there is something really broken on In clod code, i got good fps but it stutters like hell, gameprofile cannot cure that, that problems in in clod code itself.

I think there is some good news too, now clod see both of my gpu's before it working without large stutter but only find 1gpu, so now start sli/crossfire optimisation.

[FS~Phat]

I get amazing scaling in the latest beta by forcing AFRfriendly d3d in radeon pro but have massive flickering problems.

The graphics scrolling and rendering is really really smooth though and I get 90 to 130FPS on black death track. There's lots of potential now for great crossfire scaling but the latest beta is unplayable for me as I have a 5970 and 2 x 5870s (quad GPU) and it stutters along at 10fps totally unplayable. If I force AFR with radeonpro I get an amazing smooth high frame rate but then I have flickering and missing textures which is just as unplayable! Back to the last formal patch release for me as the previous beta1 was crap too.

i7 950 @ 4.6Ghz
6GB Ram @ 2000Mhz
4 x 5870 @ 1000/1300
Win 7 ult 64bit
1920x1080 res

[W0ef]

Hi Kankkis,

What Radeonpro lets you do is use CrossfireX Profiles made by AMD for other games that suffered from similar problems and try them on Cliffs of Dover.

So you could try a profile that solved Negative Crossfire Scaling for another game and try it for CoD. I will not say this helps but you never know, it seems to do the trick in other cases where they used profiles originally designed by AMD to resolve issues with a different game and manage to solve bad Crossfire performance in their game that way.

(Someone in another thread suggested using the Lost Planet DX10 Crossfire profile for instance but there are many different ones)

@Phat

Disabling Catalyst A.I. seems to have solved the flickering problem for some. You could try it out and just turn it back on should it not work.

• Disable CATALYST A.I - You must follow instructions below to disable Cat A.I. The slider settings are for enabled only, they've made it harder to disable it but here is how with latest drivers:

* Close down CCC.exe and MOM.exe via Taskmanager
* Navigate to <username> \AppData\Local\ATI\ACE\Profiles
* Open Profiles.xml with Notepad
* Alt + F and search for "Catalyst"
* Change Value Enable to Disable for Catalyst A.I
* Save
* Restart

[FS~Phat]

Ive tried just about every profile combination possible in radeonpro including scissors, tiling and AFR and none of them fixed the crossfire problem totally.

The best result was with the generic AFRfriendly D3D gaining a massive 130FPS and silky smooth Black death, but then it has flickering textures and some black/missing textures too.

I updated from 11.4 w/Cap5 11.3 to Cap1 11.4 profile too with zero improvement.

We need a new AMD CAP and possibly some more optimisations from 1C to fix the crossfire stuttering.