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Seasonic X-1250 Gold ATX 12V 24PIN 1250W Active PFC 80PLUS Modular DC to DC San Ace

Seasonic X-1250 Gold ATX 12V 24PIN 1250W Active PFC 80PLUS Modular DC to DC San Ace - 1
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Seasonic X-1250 Gold ATX 12V 24PIN 1250W Active PFC 80PLUS Modular DC to DC San Ace - 65745_l.jpg Seasonic X-1250 Gold ATX 12V 24PIN 1250W Active PFC 80PLUS Modular DC to DC San Ace - 65745_1.jpg Customer Photos (0)
Seasonic Electronics

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Reg. Price: $318.98  CAD
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   Shipping Weight:   9.6 lbs
   Part #: SS-1250XM
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Features    [ Edit | History ]

Full Modular Design (DC to DC)
Common to all X-Series power supplies, the new X-1050 and X-1250 feature the unique integrated DC connector panel with onboard VRM (Voltage Regulator Module) that enables not only near perfect D-to-D conversion with reduction of current loss / impedance and increase of efficiency but also a fully modular DC cabling that enables maximum flexibility of integration and forward compatibility.

Quick Specs:

Multi-GPU Motherboards

Efficiency 90%
Input Voltage 110 V AC 220 V AC
Output Power 1.25 kW
Limited Warranty 5 Year
Output Voltage 3.3 V DC @ 25 A 5 V DC @ 25 A 12 V DC @ 104 A -12 V DC @ 500 mA 5 V DC @ 3 A
Weight (Approximate) 10 lb
Form Factor Internal
Height 3.4"
Width 5.9"
Depth 7.5"
Number of Fans 1
Green Compliant Yes
Green Compliance Certificate/Authority RoHS WEEE 80 Plus Gold
NVIDIA SLI Supported Yes
Number of +12V Rails 1
Modular Yes

Specifications    [ Edit | History ]
General Information  
     Brand Name: Seasonic
     Manufacturer: Sea Sonic Electronics Co., Ltd
     Manufacturer Part Number: SS-1250XM
     Manufacturer Website Address:
     Product Model: X-1250
     Product Name: X-1250 ATX12V & EPS12V Power Supply
     Product Series: X
     Product Type: ATX12V & EPS12V Power Supply
     Plug/Connector: On/Off Switch
Fan Control
     Receptacles: 1 x 20+4pin ATX Motherboard
1 x 4+4pin ATX12V Motherboard
1 x 8-pin EPS12V Motherboard
6 x 6+2pin PCI-E
11 x Serial ATA
8 x 4-pin LP4 Peripheral Device
2 x 4-pin SP4 Floppy Drive

Multi-GPU Motherboards

     Green Compliance Certificate/Authority: RoHS
80 Plus Gold
     Green Compliant: Yes
Physical Characteristics  
     Depth: 7.5" (190 mm)
     Form Factor: Internal
     Height: 3.4" (86 mm)
     Weight (Approximate): 4.54 kg
     Width: 5.9" (150 mm)
Power Description  
     Input Current: 13 A @ 110V
6.50 A @ 220V
     Input Voltage: 110 V AC
220 V AC
     Input Voltage Range: 90 V AC to 264 V AC
     Input Voltage Type: AC
     Number of +12V Rails: 1
     Output Power: 1.25 kW
     Output Voltage: 3.3 V DC @ 25 A
5 V DC @ 25 A
12 V DC @ 104 A
-12 V DC @ 500 mA
5 V DC @ 3 A
     MTBF: 150000 Hour
Technical Information  
     Efficiency: 90%
     Modular: Yes
     Number of Fans: 1
     NVIDIA SLI Supported: Yes
     Power Factor Correction (PFC): Active
     Protection Type: Over Current
Over Power
Over Temperature
Over Voltage
Short Circuit
Under Voltage
     Limited Warranty: 5 Year

Seasonic Electronics SS-1250XM Customer Reviews

Product reviews on are screened for relevance and inappropriate content. Reviews may contain inaccurate information about the product. If there is a discrepancy, please use the Flag this Review link located beside each review. Reviews are not an endorsement expressed by, but opinions from customers based on their own experience with a product. We do not recommend you make purchasing decisions based on facts or opinions expressed regarding Seasonic Electronics SS-1250XM reviews.
Experience: 6 Months
A lot of power
really big and heavy
I bough this to power 3 HD7950 OC h 1.2Ghz. I previously bough an Antec gamer 900watt but it was unable to power the 3 card at the same time due to the dual rail setup.

This single rail PSU is a beast. I never saw something that big. It kept my 3 card running at 100% for a couple of month without any issue.

Experience: 2 Days
Fully modular.. comes with every type of connection needed for your motherboard. Extremly quiet!
The CPU connector is way too short.
I bought this PSU because it was on sale. Originally was going to purchase the Seasonic X 1000W 80Plus Platinum but with the 1250 - 80Plus Gold being on sale.. I coudn't resist.
The reason for going with the Seasonic brand was because from what I've read it's the leading brand in quality and they are used for other PSU companies only rebranded.
I am not disapointed with my purchase.. it is powerfull and quiet.

Experience: 3 Days
Excellent PSU
Excellent PSU that does its job fantastically. Can't go wrong with this

Experience: 2 Months
 Verified Owner
8x6+2pci-e cables, very stable.
ugly color, really stiff cables.
My SST-1200 was packing it in, random restarts, especially during Borderlands 2... This thing is amazing, I did do alot of research, although its not a true single rail, it does divert all power to a single rail. Depending on your build, the CPU cable may be too short, but I got custom cable extensions anyways, looks so much better. I have a 3way CFX HD7970 setup, overclocked X79 system, custom watercooling, its .5% from being a platinum. Its the same platform as the XFX Pro BE, but from my understanding a little improved upon. There are a lot of nice power supplies out there, it was a tough call... NZXT Hale 90 V2 1200W in white, Corsair AX1200I has apps, Be Quiet! Dark Power Pro 10 1200W is a really good build. But at the end of the day, the X-1250 suited me the best...

This review was modfied by poster @ 05-09-13 07:22 PM

Experience: 10 Days
 Verified Owner
Good And Solid
Enough for everything
Fan Is Noisy Little Bit But Its great PSU

Experience: 11 Days
 Verified Owner
1250w. full modular.
this seems to be a good power. 80+ gold is good.

Experience: 2 Days
 Verified Owner
Best PSU on the market in the 1200 range. Has the best voltage regulation of any PSU.
Modular cables are way too short. Really hard to hide the cables in a mid tower. Extensions are needed.
Can't go wrong with this PSU. Easily do quad SLI/XFire.

Experience: 2 Days
 Verified Owner
lots of power
clean looks
very quiet
lots of cabling options
would have been nice to get a 4 port sata cable
2 port sata cable is too short to be of much use
After trying out a coolermast 1300w silent pro hybrid PSU, and finding it stupid loud I sent it backa nd got this. This thing is silent. No noise at all even under a lot of load. I am very impressed. It ahs a lot of cable choices,a nd the cables are nicely sleeved. It would have been ncie if the 2 port sata connector was long though, that would have worked great for my DVD abnd blu-ray drives. And with 4 hdd/ssd, I had to run 2 3 port sata cables to that area. But it still worked out very well.
It looks good and you won't ever hear this thing unless something is very wrong.

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Messages about Seasonic X-1250 Gold ATX 12V 24PIN 1250W Active PFC 80PLUS Modular DC to DC San Ace

Stock ETA? (Yannick_R- May 28, 13, 1 Replies) Read this message

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Forum messages are not reviewed and may not contain accurate information about a product. Message contents are opinions from customers based on their own experience with a product. We do not recommend you make puchasing decisions based on Forum messages.
Reviews from the Web

Below are reviews found on other web sites for this product submitted by customers.

Comment: 90.08% efficient at 100% load!
Posted by: CoolRonZ @03/10/13
Submit a review link   |   Latest 30 reviews
Product Warranty
1 year limited warranty through
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