CREATE TABLE table_26559 ("Model number" TEXT, "Frequency" TEXT, "L1 Cache" TEXT, "FSB" TEXT, "Mult." TEXT, "Voltage" TEXT, "TDP" TEXT, "Socket" TEXT, "Release date" TEXT, "Part number ( s ) " TEXT, "sSpec number" TEXT)

What's the part number of the model with TDP of 2.9 (max.4.1~5.4) w?
SELECT "Part number(s)" FROM table_26559 WHERE "TDP" = '2.9 (Max.4.1~5.4) W'
SELECT "Part number(s)" FROM "table_26559" WHERE "TDP" = '2.9 (Max.4.1~5.4) W'