4b0df59f_com___The_Crucial_SSD_glossary__Description
[Title] Speed [Description] 
There are two types of speed: frequency and bandwidth. Frequency refers to how many cycles the data can run per second, typically expressed in the number of MHz per second (1 MHz = 1 million cycles per second). Bandwidth refers to how much data can pump through the system's pipeline. Think of bandwidth like a drainage pipe. The bigger the pipe, the more water you can pour through at once. Bandwidth is generally expressed as the number of gigabytes per second that the system can process.
uk.crucial.com - The Crucial SSD glossary
Description