My friend gave me a system once and said that it doesn't work. He got it from someone else that had built it. I opened it up and there was dust caked to every thing inside. There was dust in the video card fan, in a motherboard fan, an exhaust fan and all inside the power supply. I found out why it wouldn't work. The power supply was fried. It kills me, people pay gobs of money for systems and not even keep them clean.