CREATE TABLE table_16729930_18 (tdp VARCHAR, release_price___usd__ VARCHAR)

For a release price of $72, what is the TDP of the microprocessor?
SELECT tdp FROM table_16729930_18 WHERE release_price___usd__ = "$72"
SELECT "tdp" FROM "table_16729930_18" WHERE "$72" = "release_price___usd__"