nimrod123

i don't have the game running yet (steam wont deliver the activation key), i just saw the crossfire thread title and knew that ULPS is a pain in the ass. Particular in ARMA 2. also a lot of people don't know about the fix so i thought it might help EDIT: i also suspect that the game processes the video info as a single thread of info, meaning that multi GPU cores are actually bad as the computer tries to pass the info back and forth wasting time. Has any one tried 3 or 4 card setups, or does SLI from Nvidia work? Also has anyone got an ATI multi core card (like the 6990?) how does that work?

to get crossfire to use a second card you have to disable a power save feature that makes the CCC think that the two cards are one (I have no idea why). its called ULPS and this page explains how to get rid of the feature, it also stops the second card disabling during the middle of play and screwing the picture http://www.overclock.net/t/667144/crossfire-disabling-ulps EDIT: it does require reg editing because ATI claim its not a broken feature, even though with it off the 2nd card now shows up working in things like CCC and system moniter