Fully 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 Voltage Regulator Module (VRM) 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.
Seasonic Patented Hybrid Silent Fan Control - S2FC & S3FC
An industry first, advanced three-phased (Fanless, Silent and Cooling Mode) thermal control balances between silence and cooling. In addition, for X-1050 & 1250 a selector switch is provided to allow you to select between the Seasonic S2FC control, without fanless mode or the S3FC fan control, with fanless mode.
Sanyo-Denki San Ace Silent Fan
The world-renowned Sanyo Denki Ball bearing fans are made of the highest quality components to ensure maximum quality and performance. The use of spoon shaped high-density plastic fan blades with smoothed leading edges, strict tolerance ball bearings and precision copper axel are just some features to ensure ultra-low noise performance and quality. In addition, the fan uses three balancing points, instead of the industry standard of two points, to ensure perfect balance and rotation. The Sanyo Denki fan is a perfect match to the class leading Sea Sonic Hybrid Silent Fan control for the absolute top performance of the industry.
Special Features
- 80PLUS® Gold Certified Super High Efficiency
- Full Modular Cabling Design
- Patented DC Connector Module with Integrated Voltage Regulator Module (VRM)
- DC to DC Converter Design
- Seasonic Hybrid Silent Fan Control
- Sanyo Denki San Ace Silent Fan
- Conductive Polymer Aluminum Solid Capacitors
- Highly Reliable 105°C Japanese Brand Capacitors
- Tight Voltage Regulation (±3%)
- Active Power Factor Correction (99% PF Typical)
- High +12V Output
- High Current Gold Plated Terminals
- Dual Sided PCB Layout
- Ultra Ventilation (Honeycomb Structure)
- Multi-GPU Technologies Supported
- All-in-One DC Cabling Design
- Easy Swap Connector
- Universal AC Input (Full Range)
- 5 Years Warranty
Product Information
Model: X-1050/1250 (SS-1050XM & SS-1250XM Active PFC F3)
1. Dimension (LxWxH): 190 x 150 x 86mm
2. AC Input & DC Output Voltages (Full Range: 100 ~ 240V (Max 90 ~ 264V))

3.Wire Configuration
Pros: >super quiet, even under load >flat, black cables >80+ Gold Cert >Full modular >extremely well packed, save for a lack of cellophane.
Cons: >Cables are a little short >It really is meant to be installed fan-up
Overall Review: I have only heard the fan spin up once actually, and this bad boy is powering a GTX 760, 4 sticks of DDR3, 5 HDDs, 1 optical, and a 3770K OCed to 4Ghz. It takes BF3 set to Ultra across the board and a series of busy scenes to get the active cooling to engage. Now, I admit, I do not know exactly *how* this unit engages it's active cooling. I do not know if it is looking at the load that is under, or if it approaches/surpasses a certain temperature. I have a HAF X, under Posi-pressure, so I am inclined to say that it is the unit temp that engages the fan. As for the cables, I do have this in a HAF X, so that certainly doesn't help. But cases have only just been getting bigger. The HDD cable I wanted/had to use was just barely long enough, same for the SATA cable I ran to optical drive. The PCIe cable was also just barely long enough (it doesn't look very neat). But all of these cables would have been too short if I had installed the unit fan-down (as I initially tried to do). The HAF X has a vent for PSU fans that I like to take advantage of; give it a dedicated cold-air supply. But this simply wasn't going to work. I could buy extensions - and already use them for the 24pin and 8pin CPU - but for the expense in that, I would rather just make a set of sleeved cables for my case. The unit was very well packed. Velvet bag, inside of closed-cell foam box, cables bagged in a reusable bag, etc. The only gripe I can offer is that the external packaging came without any kind of seal on it; cellophane or tape. You could just pop the box right open after taking it out of the Newegg shipping package. There was no sign of any sealing tape/sticker ever being on the box, so I'm guessing it's normally shrink-wrapped. This seems like it is becoming a more common occurrence with Newegg; opening a product for one reason or another. First package I've received where this had happened, but it is being mentioned more often on various forums. Luckily, everything was there and in "new" condition. I did not feel the need to contact them about it, but I do hope they read this. If they want to open something off their shelves, that is their choice. Just don't turn around and sell it as "new". All in all, nothing worth knocking an egg off for. It's a solid PSU, and I have no doubt that it will make it to the end of it's hefty warranty, and then some.