When will new semiconduter materials be required? In other words, are we at the boundaries yet of silicon? It seems as Guatam explained it, there will eventually be a limit of how fast the CMOS switches between PMOS and NMOS generating the 1-0 signal neccessary. Yet with AMD recently pushing past 7ghz on "old" technology, it seems like it is more in how effecient the rest of the system is and not neccessarily all on the switching of the signal inside the processor itself?

What did Intel pull off with SB that allowed the discharge of electron to happen quicker at "normal" operating temperature? I.E. 5ghz possible without increasing electron conductivity greatly through temperature?