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Seasonic X-Series 1250W Gold Power Supply Review

Manufacturer: Seasonic

Specifications and Packaging

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The Seasonic X-Series 1250W power supply is rated for a combined, continuous output power of up to 1,250 watts at 50°C operating temperature (internal case air temperature).  The PSU includes universal AC line input (automatically adjusts to the AC line voltage) and active PFC, which makes the unit more environmentally friendly to the local power grid.  The X-1250 features a single +12V rail that can deliver up to 104A (1248W) of power; virtually the entire capacity of the unit. 

Specifications from the Seasonic web site:

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Packaging and Parts

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The Seasonic X-1250 power supply arrived securely packed inside a standard retail box that highlights the unit's main features and specifications.  The power supply itself is enclosed in a black velvet bag with a gold Seasonic logo. 

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In addition to the power supply the package includes a power cord, mounting screws, Nylon pouch with modular cables, wire & cable ties, Seasonic case badge, and a multi-language Owner's Manual.

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A total of 14 modular cables come neatly packed inside a black and silver nylon storage pouch along with one 4-pin FDD cable adapter.

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March 7, 2013 | 11:20 PM - Posted by Glen (not verified)

Seasonic X-1250 1250W Power Supply

I've bought this PSU power supply for 1 year now and it has a 7 years warranty period. Sad thing is it has failed on me 4 times every 2 to 3 months later. Totally disappointed as i've to detach it again to have it exchange :(

November 26, 2014 | 09:15 AM - Posted by subrata mallick (not verified)

dear sir
my name is subrata mallick and i have Seasonic X-Series 1250W Gold Power Supply with me , but i cannot connect the power supply with my pc , it is very difficult for me , sir can u please send me the circuit diagram and the pin configuration of back panel.
thank you .

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