CREATE TABLE table_name_64 (date INT, cores_per_die___dies_per_module VARCHAR, clock VARCHAR)

What is the latest date with Cores per die / Dies per module of 2 / 1, and a Clock of 1.4-1.6ghz?
SELECT MAX(date) FROM table_name_64 WHERE cores_per_die___dies_per_module = "2 / 1" AND clock = "1.4-1.6ghz"
SELECT MAX("date") FROM "table_name_64" WHERE "1.4-1.6ghz" = "clock" AND "2 / 1" = "cores_per_die___dies_per_module"