CREATE TABLE table_26573 ("Processor" TEXT, "Brand name" TEXT, "Model  ( list ) " TEXT, "Cores" FLOAT, "L2 Cache" TEXT, "Socket" TEXT, "TDP" TEXT)

What is the brand name associated with the model 4x0?
SELECT "Brand name" FROM table_26573 WHERE "Model (list)" = '4x0'
SELECT "Brand name" FROM "table_26573" WHERE "Model (list)" = '4x0'