Hi, I noticed that the one of the two graphic cards (2x ati 4770's in crossfire) after installing catalyst drivers 12.1, 12.2 or 12.3 has workload 0% during gaming or benchmarks although in catalyst control center crossfired is enabled. ( gpu-z saw other times "disabled" and other times "enabled 2 gpu's" about crossfire). I had installed CAP with every version of 12.1, 12.2 and 12.3 catalyst drivers but the issue didn't solve. I tried several times to install 12.1, 12.2 and 12.3 catalyst drivers (clean install using driver sweeper, reinstalling win 7 etc.) but the issue remains testing with msi Combustor Benchmark and a lot of games like pes 2012, fifa 2012, nba 2012 which support crossfire. But when I installed catalyst drivers 11.12 or previous versions issue dissapeared and both cards worked properly (workload on both cards 70-95%). Is there any way to enable "real crossfire" using catalyst drivers 12.1, 12.2 or 12.3? Thank you very much!