Originally posted by Him
One clock cycle persecond. One clock cycle is one calculation that your CPU does. 1 MHz, like Elba said, it mega, or million. Therefor, 6 megahertz would be 6 million cycles per second. Gigahertz would be billion. 6 gigahertz would be 6 billion clock cycles per second, or 6 billion calculations per second.
1 clock cycle is not one calculation per second, this is why AMD performs better with lower clock speeds.
1 clock cycle pushes data through to the next transistor in the CPU. the lower the number of transistors it has to go through, the fewer clock cycles it needs to process an instruction.
1 MHZ = 1,000 KHZ = 1,000,000 HZ or 1,000,000 clock cycles per second