CREATE TABLE table_name_71 (voltage VARCHAR2, l2_cache VARCHAR2, turbo VARCHAR2)

What is the voltage when the L2 cache is 2 256 kb and the turbo is 5/8?
SELECT voltage FROM table_name_71 WHERE l2_cache = "2 × 256 kb" AND turbo = "5/8"
SELECT "voltage" FROM "table_name_71" WHERE "2 × 256 kb" = "l2_cache" AND "5/8" = "turbo"