The Thermaltake Toughpower GF A3 850W is the objective winner of this comparison, securing more category wins than its competitor. Its most significant advantage is a 13% higher wattage capacity compared to the be quiet! Pure Power 12 M 750W. While the latter holds a 8% advantage in MSRP, the superior power output of the Thermaltake unit makes it the more robust choice for systems requiring higher energy delivery.

Users building high-performance systems that demand increased power overhead should select the Thermaltake Toughpower GF A3 850W to utilize its greater wattage capacity. Conversely, those prioritizing a lower MSRP for their build should choose the be quiet! Pure Power 12 M 750W. Both units offer comparable performance across the majority of measured specifications, so the final decision rests on whether your specific hardware configuration requires the additional power or the cost savings.