OpenGL performance under MacOS seems to be shockingly bad for me and my flashed 4890, at least in Portal… I'm getting about 30 frames a second at best and often in the 20s for 1900x1200 with maxed detail. It should be several times that… …so the question is, why's it happening? Is it just because I'm using a flashed card and QECI enabler? What are those of you with Apple-branded 4870s getting? ATI at fault? Valve? Apple? Us, for using hacked up crap?