The $170 Seasonic X-750 provides a positive first impression when we unpack it. The 750 W PSU is stowed away in a black velvet case, while the cables come in two nylon packs. Except for Corsair, Seasonic is the only manufacturer in this roundup to use a fully modular cable management system, with even the ATX and CPU cables being modular (though the value of this is questionably, since you're probably not going to use a power supply without hooking it up to your motherboard).
The fan on the Seasonic X-750 only starts running at loads above ~250 W, otherwise staying perfectly silent. The 750 W PSU is 80 PLUS Gold-certified, and its single +12 V rail (preferable to all of the units with dinkier +12 V output spread over multiple rails) can handle up to 62 A.
|AC Input||200-240V, 50-60 Hz|
|DC Output||+3.3 V||+5 V||+12 V (#1)||+12 V (#2)||+12 V (#3)||+12 V (#4)||-12 V||+5 Vsb|
|25 A||25 A||62 A||n/a||n/a||n/a||1.0 A||3.0 A|
|Rail Utilization||Sys||Sys||CPU & VGA|
|Combined Output||125 W||744 W|
|Total Continuous Output||750 W|