CREATE TABLE table_6313 ("Model" CLOB, "Codename" CLOB, "Capacities  ( GB ) " CLOB, "NAND type" CLOB, "Interface" CLOB, "Form factor" CLOB, "Controller" CLOB, "Seq. read/write MB/s" CLOB, "Rnd 4KB read/write IOPS  ( K ) " CLOB, "Introduced" CLOB)

Which controller has an interface of pcie 2.0 8?
SELECT "Controller" FROM table_6313 WHERE "Interface" = 'pcie 2.0 × 8'
SELECT "Controller" FROM "table_6313" WHERE "Interface" = 'pcie 2.0 × 8'