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_48 ( release_date VARCHAR, fpu_width VARCHAR, l2_cache VARCHAR, multi_1 VARCHAR )

### Question ###
What is the release date of the 2x 512 kb L2 cache with a 11x multi 1, and a FPU width of 128-bit?

### Accurate SQL ###

SELECT release_date FROM table_name_48 WHERE l2_cache = "2x 512 kb" AND multi_1 = "11x" AND fpu_width = "128-bit"