If you google, you will find a lot of people overclocking their 8400M GT on a Vaio and it always worked like a charme, regardless of people saying it will fail, die or is not a good idea at all. Since 2009 I use the following settings while gaming : Core Clock from 450 to 550 Memory Clock from 602 to 770 From XP to Vista, via Win 7 to Win 8.1 Pro Some (like me) just even use a cooling plate below the laptop, without ever breaching the 70°. And some use even higher settings, gaming on around 88°. Now, on Win 8.1, using the inf modded "wonder" 337.50 beta driver, it feels better then ever before, using RivaTuner. (well, it is not just a feeling) I never used benchmarks, but compared the gameplay feeling using Call of Juarez, Entropia Universe or various Emulators like Dolphin, PSP or PS2. And I must say, right now (Win 8.1+beta driver) Im able to put my trust back into the work of software companies. While I often thought they became lazy (mainly because of windows and its libraries), leaving the old hardware behind (mainly android) the "power" of this old laptop finally proved me wrong. ( a bit) And it feels good.