Overall, the performance isn't bad, but needs to be more optimized.
OpenCL enabled and working: ~580FPS with OpenCL OceanWave.
This is the problem:
after using a benchmark tool (and the temperature of my card went obviously up) the card stays at 50°C, and it's too hot for me.
also, when OS X puts the monitor off the temperature goes up (from 39 to 50°C).
(see Core GPU on temperature)
I know that this problem is related to the AppleGraphicsPowerManagement kext. I read the thread to unleash the power of my card but it didn't help. I tried the 'High Performance' edits but it decreased the performance!