In this work, we use an upgraded version of the National High Magnetic Field Laboratory (NHMFL) HiPER instrument . In addition, the improved understanding of the spin dynamics of chirped pulsed DNP permits an optimization of the DNP efficiency, leading to an enhancement of ℇ∼ 496 with ∼250-300 W of microwave power. This is a significant improvement in the efficiency of the DNP process, even with only about ¼ of the µw power available in the previously reported experiment. The lower µw power is due to the limited AWG output power and aging of the EIK.