Just read this over at the Apple official forum: "The belief that iMacs use mobile chips is completely dumbfounded. All the intel iMacs at least use desktop variants, hence the close performance between the iMac's 8800GS and the Mac Pro's 8800GT (The iMac actually has the same card as the Mac Pro, just underclocked to GS frequencies, hence the 512MB config, the GS coming in 384 and 640MB configs). Also, there is no 8800M GS available." (thread here) Can someone shed some light on this? Could my Nvidia 8800GS really be a underclocked 8800 GT? Here´s the specs for the 8800 GS: Core Clock (MHz) 550 MHz Shader Clock (MHz) 1375 MHz Memory Clock (MHz) 800 MHz Memory Amount 384MB Memory Interface 192-bit-bit Memory Bandwidth (GB/sec) 38.4 Texture Fill Rate (billion/sec) 26.4 And here´s specs for the 8800 GT: Core Clock (MHz) 600 MHz Shader Clock (MHz) 1500 MHz Memory Clock (MHz) 900 MHz Memory Amount 512MB Memory Interface 256-bit Memory Bandwidth (GB/sec) 57.6 Texture Fill Rate (billion/sec) 33.6 And here´s info for the 8800GTS: Core Clock (MHz) 650 MHz Shader Clock (MHz) 1625MHz Memory Clock (MHz) 970 MHz Memory Amount 512MB Memory Interface 256-bit-bit Memory Bandwidth (GB/sec) 64 Texture Fill Rate (billion/sec) 41.6 Since we know for sure that we don´t have the official 8800 GS (because of the 512MB mem and 256 bit memory interface in the iMacs "8800GS"), I guess it´s only logical that this is an underclocked version of the GT or the GTS. Either way, this would mean that it´s a perfect candidate for overclocking, only that so far it seems no one has managed to (even with drivers from laptopvideo2go, specificially these: 169.12). As somebody said on another forum there was very little difference in graphical performance between the iMac and the Mac Pro, after updating the iMac with drivers from Laptopvideo2go. But isn´t it necessary to flash the firmware or softmod it in order to up the memory speed? Or is it enough just to install different drivers in order to get higher clocking speeds? And if the only solution is to flash the firmware, does anyone know if doing this would create a problem with the Leopard system?