>The end of Dennard scaling was why the Pentium 4 architecture was a dead end and never hit 10Ghz like it was supposed to, why the Cell processor never hit the

>The end of Dennard scaling was why the Pentium 4 architecture was a dead end and never hit 10Ghz like it was supposed to, why the Cell processor never hit the 5Ghz it was supposed to Around that time the PowerPC 970 aka G5 also failed to achieve 3 GHz, breaking the promise Steve Jobs publicly made at one of his keynotes for Apple.