The DeepCool PX850G and the Thermaltake Toughpower GF A3 850W are tied in this objective comparison, as both units share identical specifications across five of the seven evaluated categories. The DeepCool PX850G holds a slight edge in MSRP, offering an 8% advantage in that specific metric. Conversely, the Thermaltake Toughpower GF A3 850W provides a 3% advantage regarding its ATX version, which stands as its most significant technical improvement over the competitor.

Users prioritizing cost efficiency should select the DeepCool PX850G, as it offers a superior MSRP. Those who place a higher priority on the latest power supply standards should choose the Thermaltake Toughpower GF A3 850W for its more advanced ATX version. Because both power supplies are otherwise equivalent across the majority of measured specifications, the final decision rests entirely on whether the buyer values a lower initial cost or the updated ATX standard.