Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_142573_1 (clock_rate__mhz_ VARCHAR, bandwidth__mb_s_ VARCHAR)

### Question ###
Name the number of clock rate mhz when bandwidth mb/s is 2400

### Accurate SQL ###

SELECT COUNT(clock_rate__mhz_) FROM table_142573_1 WHERE bandwidth__mb_s_ = 2400