CREATE TABLE table_24538587_11 (i_o_bus VARCHAR, brand_name__list_ VARCHAR)

What i/o buses are associated with the brand name Core i3-21xxt?
SELECT i_o_bus FROM table_24538587_11 WHERE brand_name__list_ = "Core i3-21xxT"
SELECT "i_o_bus" FROM "table_24538587_11" WHERE "Core i3-21xxT" = "brand_name__list_"