Current Steam IL-2: COD release is generally stable and Crossfire runs well with good frame-rates on my machine. However, since installing the 15866 beta-2 (and core patch) when I ALT-TAB out and then go back into the game, Crossfire performance is affected with second card subsequently showing only half the utilization of the first and very significantly degraded graphics performance... so far only a full restart of Windows will fix this, restarting the game won't.
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