after i upgraded EFI on my retina macbook pro the proformence reduced to unusable. under heavy load( under mac os or windows7) the cpu clock drops and as well as cpu clock. this is the screen shot of gpu clock monitoring from windows u can see the gpu clock is running at 270Mhz at most of the time and trying to be back to 725Mhz(yea, not 900Mhz!) when im running a graphic benchmark. cpu will run about 1.1Ghz as well. samething will happen when im playing D3 on Mac OS. Reseting SMC and PRAM did not help! reinstalling windows7 via bootcamp did not help either. i there any one here having the sam trouble? MacBook Pro with Retina display, OS X Mountain Lion (10.8.2) thank you! Update: SMC reseting will fix the low fps problem under Mac OS but not bootcamp Windows! this is still killing me!