The be quiet! Straight Power 12 850W and the Corsair RM1200x SHIFT are evenly matched, resulting in an objective tie across the evaluated specifications. While both units offer comparable performance, they each hold a distinct primary advantage. The be quiet! Straight Power 12 850W is the more cost-effective option, boasting a 38% better MSRP. Conversely, the Corsair RM1200x SHIFT provides significantly higher power capacity, delivering a 41% advantage in total wattage.

Choose the be quiet! Straight Power 12 850W if your primary goal is to minimize your initial investment while maintaining a reliable power supply for your system. If your build requires substantial power headroom for high-end components, the Corsair RM1200x SHIFT is the superior selection. Select your unit based on whether your priority is the 38% better MSRP or the 41% higher wattage capacity provided by these respective power supplies.