I have the most inconsistent activity from my crossfire setup, and I cannot figure out what is causing the issues. I have been searching all over the internet for an answer to my problem, and thus far cannot find anything (I'm sure there is one out there). I have two monitors setup using extended desktop, and when I open a game I run it full screen in 1920x1080 on the main monitor. The side monitor has GPU-Z and Trixx running to check activity on video cards. I have tested using just the main monitor and it does not make a difference in the inconsistency. When I load a game, sometimes both cards are active and it works just fine, and other times only the primary card is active with the second card showing 0% activity and running at 157/300mhz. It seems if I alt-tab out of a game, while actually playing (meaning not in menu, but actual gameplay), and then switch back to the game the second card will SOMETIMES become active, kicking on to 725/1000mhz. Anyone know what the cause of this inconsistency could be? In Trixx I have Disable ULPS selected, and I have also edited the registry for each EnableULPS to a value of 0. In Furmark tests the card automatically kicks in and there is never an issue.
System:
MB: Biostar TA890FXE
CPU: AMD Phenom II B55 (unlocked to quad core OC to 3.6ghz - prime95 stable) w/ spire thermax eclipse ii cooler
Memory: 12 GB G-skill Eco Series 1333mhz 7-7-7-21 1.35v
Graphics: Primary: Sapphire HD5850 Reference Card, Secondary: XFX HD5850 ZAFC Non Reference. Both stock speeds 725/1000
Drivers: AMD Catalyst 11.12
OS: Win 7 - 64bit
PSU: Corsair GS800
Games: BF3, NFS Hot Pursuit, NFS The Run, Hawx
System:
MB: Biostar TA890FXE
CPU: AMD Phenom II B55 (unlocked to quad core OC to 3.6ghz - prime95 stable) w/ spire thermax eclipse ii cooler
Memory: 12 GB G-skill Eco Series 1333mhz 7-7-7-21 1.35v
Graphics: Primary: Sapphire HD5850 Reference Card, Secondary: XFX HD5850 ZAFC Non Reference. Both stock speeds 725/1000
Drivers: AMD Catalyst 11.12
OS: Win 7 - 64bit
PSU: Corsair GS800
Games: BF3, NFS Hot Pursuit, NFS The Run, Hawx