What are Microprocessor speeds are rated in?

The answer is Mega Hertz. Check it out on the Web : -)

My Two Cents Edit: How do people who give bad answers get trust? Hertz measures the REFRESH RATE OF A PROCESSOR. IPC, MIPS, and MFLOPS measure performance / speed with a great deal of accuracy over clock speed. An intel i7 with all its cores but one disabled will crush a single-core Pentium 4 in tests, even if you set the single-core i7 to 2.0GHz and the Pentium 4 to 4.0GHz