The ASUS ROG THOR 1200W Platinum III and the Corsair HX1200i are objectively tied, as both units share identical specifications across five of the seven measured categories. The ASUS ROG THOR 1200W Platinum III holds a 3% advantage regarding its ATX version, while the Corsair HX1200i maintains a significant 40% lead in MSRP. Because neither unit dominates the overall feature set, the choice depends entirely on whether you prioritize the latest power standard or a more favorable initial cost.

Choose the ASUS ROG THOR 1200W Platinum III if your build requires the specific benefits provided by its superior ATX version rating. Conversely, select the Corsair HX1200i if you prefer to maximize your budget, as its 40% advantage in MSRP makes it the more economical option. Since both power supplies offer equivalent performance across the majority of technical metrics, your decision should be guided strictly by these specific differences in standard compatibility and cost.