A turbine rotor blade with low cooling flow includes a first forward flowing 5-pass serpentine flow cooling circuit that provides cooling air to a trailing edge row of exit holes and a second forward flowing 3-pass serpentine flow cooling circuit that provides cooling air to a leading edge showerhead arrangement of film cooling holes and to a blade tip cooling channel. The blade tip cooling channel includes a film cooling holes for the blade tip. The low flow cooing circuit provides for cooling of the blade without the need for impingement cooling of the leading edge and trailing edge regions.