According to PC Week, Cyrix Corp is so keen to get 166MHz 6×86 processors out into the market in quantity that when it receives the parts from IBM for testing and grading as 166MHz or 150MHz parts, it sounds as if it runs the chip at 166MHz, turns the lights out, and if the part doesn’t actually glow in the dark, it gets classified as a P166+. According to the paper, this means it has to attach a large heat sink, a fan that runs three times as fast as most CPU fans, and its customers still have to design their machines like wind tunnels. One analyst told the paper the heat sink gets so hot you could brand cattle with it.