The three most efficient power supplies are the Seasonic Prime Titanium, Enermax Platimax DF 600W and the Be quiet! Dark Power Pro 11 650W, with an average efficiency of 92.9%, 91.9% and 91.1% respectively. Note that the Silverstone Strider Titanium 600W with 90.8% efficiency ends up in fourth place behind the Platinum-power supplies of Enermax and Be quiet! This shows that a certificate does not necessarily mean anything. The Seasonic and the Silverstone power supply do not reach 96% efficiency that Titanium imposes at 50%. However this is presumably caused by the fact that our test structures the load differently (and more realistically) than the 80Plus group.