https://goo.gl/4YWZ17 tomshardware已经测过the PCI-SIG standard defines a maximum currentof 5.5A to the 12V motherboard portfirst to 5.9A (heated; cold it drops to 5.7A).Then it drops even more to 5.6A 未开超5.5A一点only by activating the compatibility switch(cold it registers 5.4A)测Metro Last Light 4K