The AOpen Prima Power AO700-12ALN is a rather plain looking power supply, but one which has the ability to deliver a massive 700W of power and four separate 12V rails! To sweeten things, the AO700-12ALN is also very quiet thanks to the large 120mm fan generating 28.4 dBA at maximum RPM. The most impressive feature of the AOpen Prima Power AO700-12ALN are its quad +12V rails, all four of which have a maximum rating of 15 Amps. The +3.3V, +5V and the four +12V rails can output a maximum of 680W and the total peak output of the power supply is 700W at an internal temperature of 35 degrees Celsius.