StarTech.com ATXPOW250PRO, 250 W, 65%, Non-Modular, 32.6 dB, 100000 h, 0 - 50 °C StarTech.com ATXPOW250PRO. Total power: 250 W, Efficiency: 65%. Cabling type: Non-Modular. Noise level: 32.6 dB, Mean time between failures (MTBF): 100000 h. Weight: 3.44 lbs (1.56 kg). Package weight: 4.17 lbs (1.89 kg)