Thanks to you for being so supportive, I was't expecting to receive so much answers, thank you. Doyle, don't think is the dust since today my PC reaches its 6 month use with 1525 hours of use :o; I will check it just to be sure. Jackster, I use PCWizard to check the temperature yet I will try that software and see the results. DayZPvP, forgot to mention, I live in Argentina (Winter), for example, today we have 17ºC and its raining.