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_name_64 ( date INTEGER, cores_per_die___dies_per_module VARCHAR, clock VARCHAR )

### Question ###
What is the latest date with Cores per die / Dies per module of 2 / 1, and a Clock of 1.4-1.6ghz?

### Accurate SQL ###

SELECT MAX(date) FROM table_name_64 WHERE cores_per_die___dies_per_module = "2 / 1" AND clock = "1.4-1.6ghz"