I have a Dell Vostro 1510 running Vista Home Premium. I started noticing that when playing games sometimes performance would go down considerably which coincided with the laptop being considerably hotter to the touch. I installed speedfan to check if this was true and as it turns out the gpu can reach up to 95°C without the fan going full speed (I can hear it run but not full speed). The fan might reach full speed but not necessarily when the temperature is at is highest which means that the laptop usually overheats when playing videogames. I'm not sure if this has happened since I purchased the laptop or after upgrading BIOS. I currently have the latest BIOS from Dell (A15), and the latest reference drivers from Nvidia for the videocard which is a geforce 8400M. Can it be that the overheating is due to using the reference drivers and not the manufacturers? I used the reference drivers because Dell hasn't updated videocard drivers for almost a year.