A Detailed Look

The Seasonic S12G-750 power supply features a black matte finish and measures only 140mm (5.5”) deep. It uses a single 120mm fan on the bottom for cooling.

The backside panel features an open grill and includes a power receptacle and master On-Off switch.  The honey comb grill allows air to exhaust out of the power supply for cooling the internal components with minimal turbulence and noise.

The S12G-750 uses a very capable 120mm ADDA fan (AD1212HB-A70GL) that incorporates dual ball bearings and is rated for up to 2,200 rpm and 0.37A at 12 VDC. Seasonic frequently uses the more expensive Sanyo Denki SanAce fan on their premium power supplies. By going with the ADDA fan and eliminating the fanless operation mode (S3FC), Seasonic is able to trim the cost a little.

The Seasonic S12G-750 power supply incorporates all fixed cables, which also helps keep the cost down.  The S12G-750 has a good assortment of cables and connectors.  All of the cables are a flat, ribbon-style cable except for the main 24-pin ATX power cable, which is covered with a black, braided plastic mesh sleeving.


•    (1) Main power connector (24-pin/20-pin) 550mm
•    (1) ATX12V/EPS12V (4-pin + 4-pin) 550mm
•    (1) EPS12V (8-pin) 550mm
•    (4) PCI Express (6+2-pin)
•    (4) Peripheral Optical/HDD (4-pin)
•    (10) Peripheral Serial ATA (15-pin)
•    (1) Peripheral FDD (4-pin) adapter

Looking inside the Seasonic S12G-750 PSU, you will see a clean layout utilizing high quality components. The primary stage capacitor is manufactured by Nippon Chemi-Con and rated at 470uF, 450V, and 105°C.  The secondary features predominantly solid polymer capacitors with a few Nippon Chemi-Con electrolytic caps thrown in for good measure.  Just like all previous Seasonic power supplies we have seen, the layout and component selection appears to be excellent.

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