The Corsair SF850 and the Thermaltake Toughpower GF A3 850W are objectively tied, as each unit leads in one specific category while matching in five others. The Corsair SF850 holds the primary advantage in efficiency, which is 25% better than its competitor. Conversely, the Thermaltake Toughpower GF A3 850W offers a significant financial benefit, with an MSRP that is 40% better than the alternative. Both power supplies provide equivalent performance across the majority of measured specifications.

Users prioritizing long-term energy efficiency should select the Corsair SF850 for its superior rating in that category. Those who are focused on minimizing initial hardware costs should choose the Thermaltake Toughpower GF A3 850W due to its more favorable MSRP. Because both units share identical performance in five out of seven categories, the final decision rests entirely on whether the buyer values power efficiency or a lower purchase price.