I have a MBP with the 512 MB NVIDIA 9600M GT. I OC'd the card under Windows to the following specs: Core Speed: 570 MHz. Memory Clock: 1280 MHz. Shader Clock: 800 MHz. Temps are stable at 85 Celsius while running Crysis at High settings at 45 FPS with 1440X900 res. All overclocking was done under Windows 7 with RivaTuner, running the 186 WQHL NVIDIA driver. Normal GT 330M: Core Speed: 575 Mhz. Memory Clock: 1260. Shader Clock: 790. Apple GT 330M After Factory Underclocking: Core Speed: 500 MHz. Memory Clock: 980 MHz. Shader Clock: 600.