[Solved] Weird CF Issue. Radeon 6850

I noticed when playing Bf3 the huge lag spikes, i'm sitting there thinking to myself.. "why the hell is it acting like this when I have two 6850's oc'd to 800mhz?!" The bottom image verifies that they are both recognized, device manager also recognizes them.


Here are two images that show one card being used and the other not...


Here is the second image showing one card using 3/4, and the other 1/4.



Drivers are updated to 12.1, and Cap3? Was a beta application profile If I remember correctly, before they released Cap1.

I'm at a complete loss here guys, the cards are seated (obviously) the cf bridge is fine (far as I know), drivers were installed correctly, and i'm running the cap profile stuff. I seriously don't see why i shouldn't be getting a consistent 40 - 50 fps under heavy load in bf3 and an avg of 60-70 under light load (staring at the ground.) Running everything in BF3 as high as possible.

I think it's just BF3, I'm running HD6870's in CF and have had similar problems in singleplayer and multiplayer before I upgraded my CPU.

Earnie is close, imo.

But for me, just reinstalling ccc, and sometimes the game itself does the trick. Also try putting catalyst ai on "standard" you wont notice a difference.

edit: "notice a difference in image quality"

This did not work. Both of the cards work fine when by them selves, but when in cf, one card is always idle. I'd also like to note that when uninstalling drivers the screen size did not change as it usually does when I uninstall the driver from device manager as well (skipped that for the sake of a control). Would also like to note that the first time uninstalling resulted in a crash, and a system reboot.

Lol, okay fixed that. Now cf seems to work. Any idea about the spikes down to 15 fps?

I'd suggest running 2xMSAA or none (with post processing at High). I'm running a pair of overclocked 5850s and they get some FPS drops occasionally, which was reduced by lowering the AA level. Might be a VRAM issue. If not that, probably CPU related.