The Seasonic Prime TX-1300 ATX 3.1 is the objective winner of this comparison, securing more individual specification victories than its competitor. Its most significant advantage is its total power output, which provides 53% more wattage than the be quiet! Straight Power 12 850W. This substantial increase in capacity allows the Seasonic unit to support more demanding hardware configurations, establishing it as the superior choice for users prioritizing raw power delivery and high-end system headroom.

Users who require maximum power for intensive builds should select the Seasonic Prime TX-1300 ATX 3.1 to take advantage of its superior wattage. Conversely, the be quiet! Straight Power 12 850W is the better option for budget-conscious builders, as it offers a 58% better MSRP. Choosing between these two units depends entirely on whether your primary requirement is the increased capacity of the Seasonic model or the significant cost savings provided by the be quiet! alternative.