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  1. Please, excuse my poor English. My GTX560Ti works fine AGPM(AppleGraphicsPowerManagement) with ONE monitor. GPU core frequencies, voltages work well according to g-state's changes. But, with dual monitors, GPU's frequencies and voltages are no change.. My card always clocks up to its maximum performance even if it's not under load. (core 880MHz, shader 1760MHz, memory 2100MHz, and voltages 1.00V) As soon as I unplugged secondary monitor, it clocked down to 50MHz, within seconds. I've done a lot of testing(changing system identifies, modification info.plist in AGPM, etc), my logs show that GPU switches g-states as it should, however the GPU clock never changes. Of course, under Windows 8, GPU clocks and voltages change very well in dual monitors. My question is: Is it impossible that fermi card controls GPU power management in dual monitors?