Seasonic's S12D 850
power supply is compatible with ATX 2.2 spec standard and supports the 24 pin
ATX power connector by default. Seasonic rates the the +3.3V and +5V rails for
24 Amps and 30 Amps respectively, for a total combined output of 150W. There
are two +12V lines, each can output 70 Amps for a combined output of 840W. @ PCSTATS