question: What's the part number of the model with TDP of 2.9 (max.4.1~5.4) w?
answer: SELECT part_number_s_ FROM table_24096813_15 WHERE tdp = "2.9 (Max.4.1~5.4) W"
context: CREATE TABLE table_24096813_15 (part_number_s_ VARCHAR, tdp VARCHAR)