The Pace Of Computing
	v Think of the clock rate of a computer as the rate it executes instructions, that is, how many Fetch/Execute cycles it can complete in a second (modern computers are very complex and can complete more than one instruction per cycle) v hertz measures “cycles per second” v 100MHz, specifies “100 million cycles per second”
			A higher clock rate may not result in a faster running program, because the speed may be limited by other parts of the computer besides instruction execution rate; the speed of getting an instruction’s data is often a limitation that worsens with a faster clock