The Seasonic Prime TX-1300 ATX 3.1 is the objective winner of this comparison, securing a lead in four out of seven measured specifications. Its most impactful advantage is its superior efficiency, which outperforms the ASUS ROG THOR 1200W Platinum III by 20 percent. By excelling in the majority of categories, the Seasonic unit establishes itself as the more technically robust option for users prioritizing high-level power delivery and operational optimization.

Users who require maximum power capacity and efficiency should choose the Seasonic Prime TX-1300 ATX 3.1 for their high-demand builds. Conversely, the ASUS ROG THOR 1200W Platinum III remains a viable alternative for systems that do not necessitate the additional wattage or the efficiency gains provided by its competitor. Selecting between these two power supplies depends entirely on whether your specific hardware configuration demands the higher output and efficiency profile offered by the Seasonic model.