Manufacturer: Seasonic

Introduction and Features

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Seasonic is a well known and highly respected OEM that produces some of the best PC power supplies on the market today. In addition to supplying power supplies to many big-name companies who re-brand the units with their own name, Seasonic also sells a full line of power supplies under the Seasonic name. The new XM2-1250 is the latest addition to the X-Series and features an improved Hybrid Fan control circuit and upgraded copper conduction bars on the main PCB, which together increase efficiency and performance.

The new XM2-1250 is a second generation X-Series power supply that comes with fully modular cables and a 120mm Sanyo Denki cooling fan. It is designed to provide ultra-tight voltage regulation along with high efficiency (80 Plus Gold certified).

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Seasonic X-Series XM2-1250 Special Features

Ultra Tight Voltage Regulation Improved load voltage regulation keeps the voltage fluctuations on the 12V output within +2% and -0% (no negative tolerance), and on the 3.3V and 5V outputs between +1% and -1%, which (under 80 Plus load conditions) results in smooth and stable operation.

Seasonic Hybrid Silent Fan Control The industry first, advanced three-phased thermal control balances between silence and cooling. The Hybrid Silent Fan Control provides three operational stages: Fanless, Silent and Cooling Mode.  In addition, a selector switch is provided to allow for manual selection between the Seasonic S2FC (fan control without Fanless Mode) or S3FC (fan control including Fanless Mode).

Reduced Cooling Fan Hysteresis is achieved by a new fan control IC, which optimizes how frequently the fan switches on and off. At 25°C ambient temperature the fan turns on when the load rises above 30% (±5%) and turns off when the load drops below 20% % (±5%). Due to this lag in response the fan switches on and off less frequently, which reduces power loss in Fanless and Silent Mode.

Dual Copper Conduction Bars on the power supply PCB help reduce impedance and minimize voltage drop, which further improves efficiency and performance.

80Plus Gold The XM2-1250 power supply is certified in accordance to the 80PLUS organization's Gold standards, offering performance and energy savings with up to =90% efficiency and a true power factor of greater than 0.9 PF.

Full Modular Design (DC to DC) The Seasonic X-Series power supplies feature an integrated DC connector panel with onboard VRM (Voltage Regulator Module) that enables not only near perfect DC-to-DC 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 XM2-1250 PSU Key Features:

•    High efficiency, 80Plus Gold certified
•    7-Year manufacturer's warranty worldwide
•    Fully Modular Cable design with flat ribbon-style cables
•    Seasonic DC Connector Panel with integrated VRMs
•    Hybrid Silent Fan Control (3 modes of operation: Fanless, Silent and Cooling)
•    High-quality Sanyo Denki San Ace dual ball bearing fan with PWM
•    Ultra-tight voltage regulation (+2% and -0% +12V rail)
•    Dual copper conduction bars on PCB for improved efficiency and performance
•    Supports multi-GPU technologies
•    Conductive polymer aluminum solid capacitors
•    High reliability 105°C Japanese made electrolytic capacitors
•    ErP Lot 6 2013 compliant and Intel Haswell processor ready
•    PCI-E 8/6 pin x 10, EPS12V/ATX12V x 2, SATA x 14, 4-pin Molex x 5, FDD x 1
•    High current Gold plated terminals with Easy Swap connectors
•    Active PFC (0.99 PF typical) with Universal AC input

Please continue reading our Seasonic XM2-1250 power supply review!

Seasonic's high quality, low power G-450 PSU

Subject: Cases and Cooling | April 25, 2014 - 11:27 AM |
Tagged: PSU, seasonic, Seasonic G-Series, 450W, g-450

The Seasonic G-450 is still more power than Josh's latest build requires but is perfect for powering a SFF system as the unit is a mere 6.25" in length.  With a pair of 6+2 PCIe power connectors and 37A on the 12V rail you will be somewhat limited in your choice of discrete GPU, reasonable consider it is a 450W PSU.  [H]ard|OCP found the quality on this unit to be good overall and excellent compared to other lower powered PSUs but found the pricing somewhat confusing as the G-550 is a mere $10 more.

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"Seasonic is continually short on marketing but long on performance, and we are good with that. Today's 450 watt G Series computer power supply makes more sense in this new world of lower power desktop CPUs and GPUs. Does the G-450 give its users solid power in this lower end of the spectrum range at the right cost?"

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Source: [H]ard|OCP

Seasonic's S12G-550; you have to pay for prime power

Subject: Cases and Cooling | February 21, 2014 - 02:49 PM |
Tagged: PSU, seasonic, S12G-550, 550W, 80 Plus Gold

With an 80 Plus Gold rating and the ability to deliver 45A on its single 12V rail the 550W Seasonic S12G-550 PSU is perfect for a mid-range rig.  A pair of 6+2 PCIe connectors gives you a choice of powering a single high end GPU or two low or midrange GPUs.  It is also relatively small, barely larger than the 120mm cooling fan it uses though some may be turned off by its non-modular cables.  At around $85 it is not the least expensive model at that wattage but [H]ard|OCP's Silver Award proves it is worth it if you want solid power for your system.

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"Seasonic builds some of the best computer power supplies on the market. When do we ever get a power supply that is actually a better product than what it is marketed to be? Not often, but that is the case with the S12G-550 PSU. It is not terribly inexpensive, but it is a great value for your hard earned dollars."

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Source: [H]ard|OCP
Manufacturer: Seasonic

Introduction and Features

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We have been reviewing Seasonic power supplies for over ten years here at PCPerspective and they have never failed to impress us. Seasonic is also one of the few companies that actually builds their own power supplies (along with supplying units to numerous other big-name brands). Seasonic has built a stellar reputation for producing some of the best PC power supplies on the market today. In their ongoing pursuit to continuously improve their products, Seasonic has recently introduced the S12G Series, which includes four models: S12G-450, S12G-550, S12G-650, and the S12G-750 that we will be taking a detailed look at in this review. Here are a few of the highlights offered by the new S12G Series power supplies.

•    80Plus Gold certification
•    Standard all in one, flat black cabling
•    High +12V Output
•    Smart and Silent Fan Control (S2FC)
•    S12G-750/650: PCI-E 8P/6P x 4, SATA x 10, 4P Molex x 4, FDD x 1
•    S12G-550/450: PCI-E 8P/6P x 2, SATA x 8, 4P Molex x 3, FDD x 1
•    Worldwide 5-Year Warranty

The S12G Series is targeted towards gamers and PC enthusiasts who want solid performance at a user friendly price. To accomplish this Seasonic has designed the S12G Series on the same basic platform as many of their premium products but has forgone a few features like modular cables and fanless operation for price conscious consumers. Retail prices are currently ranging from $79.99 USD for the S12G-450 to $109.99 USD for the S12G-750 (newegg.com, November 2013).

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Here is what Seasonic has to say about the new S12G Series: “The S12G Series is the newest addition to Seasonic’s families of award winning retail products, representing the latest innovation of our engineering team. To meet the demands of users who are looking for reliable 80Plus Gold performance for gaming and overall usage, the S12G Series is designed to support Intel’s Haswell processors, features more SATA cables and is an affordable solution for a wide range of applications.

Seasonic S12G Series Key Features:

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(Courtesy of Seasonic)

Please continue reading our Seasonic S12G-750 power supply review!

Seasonic PSUs Will Power HashFast Bitcoin Miners

Subject: General Tech, Cases and Cooling, Systems | October 22, 2013 - 04:10 PM |
Tagged: seasonic, Power Supplies, mining, bitcoin, asic

Seasonic (Sea Sonic Electronics) has announced a design win that will see its power supplies used in HashFast’s bitcoin mining rigs. The upcoming HashFast mining rigs feature the company’s “Golden Nonce” ASIC(s) and all-in-one water coolers. HashFast has a single ASIC Baby Jet and multi-ASIC Sierra rig. Both units will be available December 15 starting at $2,250 and $6,300 respectively.

The Seasonic power supplies are high efficiency models with Japanese capacitors and at least 80 PLUS Bronze. On the high end, Seasonic has PSUs that are up to 93% efficient. HashFast stated that it chose Seasonic for its mining rigs because of the build quality and efficiency. The Baby Jet and Sierra mining rigs allow users to overclock the ASICs, and the systems can be rather demanding on PSUs.

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The Golden Nonce ASIC is a 28nm chip that is rated at 400 GHash/s and 0.65 Watts per Gigahash.

Beyond that, the companies have not gone into specifics. It is good news for Seasonic, and should mean a stable system for bitcoin miners (the 93% efficiency rating is nice as well, as it means less wasted electricity and slightly more bitcoin mining profit).

The full press blast is below for reference.

Read more about Bitcoin @ PC Perspective!

Source: Seasonic

Seasonic's high quality 400W PSU, the X-400FL Platinum

Subject: Cases and Cooling | July 17, 2013 - 01:48 PM |
Tagged: PSU, seasonic, X-400FL Platinum 400W, 80 Plus Platinum, modular psu

A 400W PSU seems a little under-powered when compared to the kilowatt PSUs that are commonly reviewed but there are not many systems that actually need that amount of power.  Seasonic has designed their X-400FL Platinum 400W to provide great power, efficiency and extra features in lieu of providing huge amounts of power.  The PSU is fully modular and is able to provide an impressive 33A combined from it's four 12V rails, with an absolute minimum of ripple even during the most intense parts of [H]ard|OCP's testingAt $120 it is a little more expensive than other similar PSUs but with the outstanding build quality of the PSU it is worth it.

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"This new Seasonic PSU touts Platinum efficiency, a fully modular design, and a host of other enthusiast-worthy hardware features that will ring true with those looking for a what might be "the best" 400 watt PSU on the market. For those of you looking to build that truly powerful HTPC, this PSU also offers silent operation."

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Source: [H]ard|OCP

SeaSonic at Computex 2013

Subject: General Tech | July 2, 2013 - 10:45 AM |
Tagged: seasonic, Platinum 1200W, M12II EVO Edition, S12G, modular psu

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Computex 2013 concluded on a high note for Sea Sonic to lay the foundations for yet another highly successful year for our company. At the exhibition Seasonic has continued its tradition to introduce new models of power supplies that provide innovative and high performance solutions for a wide range of users.

During Computex 2013, we were proud to showcase our brand new Platinum 1200W power supply, which completes our premium Platinum series now extending from the 400FL Fanless to the 1200 watts top end unit. Many power users who are looking for this ultimate, fully modular model of top performance and reliability will appreciate the Platinum 1200W. This third generation, mighty power supply is built from high quality components, providing almost perfect DC-to-DC power conversion and will be equipped with our advanced hybrid silent fan control.

Seasonic has extended its popular M12II series by adding a new EVO edition in 750W and 850W models. These new models are fully modular and will be supplied with aesthetic flat black cables to facilitate customized cable management for any user. Due to the employment of higher quality components, the manufacturer’s guarantee of the M12II EVO Edition will be increased to 5 years.

Besides our current S12II series and our highly popular G series, we will launch a robust lineup of 80 PLUS Gold certified family of power supplies, consisting of 450W, 550W, 650W and 750W units. This new S12G series will feature less molex but an increased number of SATA connectors and will be entirely outfitted with flat black colored cables.

We have further extended our embedded power supply range for our growing number of industrial users and we are constantly looking out to boost cooperation with our business partners to create specialized industrial solutions.

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Source: SeaSonic

7 way PSU showdown; 550-600W weight class

Subject: Cases and Cooling | June 24, 2013 - 03:40 PM |
Tagged: TR2, thermaltake, seasonic, PowerX, in win, GS600, G Series, Dark Power Pro 10, CX600M, Cougar, corsair, Commander III, be quiet!

There is a roundup over at Legit Reviews, with seven 550-600W PSUs of which only two models will cost you more than $100.  They are a mix of 80 PLUS Bronze and Gold, some are partially modular others non-modular and of course, they offer differing power quality and acoustic performance.  In this case the most expensive PSU also came out as the winner, but pay attention to the PSU in second place which costs half as much as the Dark Power Pro 10.

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"It is natural for an enthusiast to be dazzled by monsters such as the Corsair AX1200i and the Cooler Master Silent Pro M2 1500W; however, even the majority of the enthusiasts would not actually purchase such a beast. It is (or should be) common knowledge that even a very good gaming system does not demand more than 300W-350W and thus, as power supplies are being designed to optimally perform at about 50% capacity, 550W-600W units are plenty for the vast majority of gamers and common users. It is only with multiple video cards, large raid arrays and other “specialized” designs that power requirements may increase substantially. Knowing that and realizing the need to offer our readers insight on products which truly are of interest to them, today we bring you a roundup review of seven quality 550W-600W power supplies..."

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Computex 2013: New Haswell-Ready PSUs From SeaSonic Pictured

Subject: General Tech, Cases and Cooling, Shows and Expos | June 7, 2013 - 12:56 PM |
Tagged: seasonic, PSU, m12II evo, m12II bronze, haswell, computex 2013, computex

Following Intel's announcement of new Haswell sleep states, various power supply manufacturers have released compatibility lists detailing which PSUs are able to deliver the low load necessary to support the power sipping sleep states on the 12V rail (which has not been much of a concern until Haswell).

One such PSU manufacturer was Seasonic, who has quite a few Haswell-ready power supplies across several lineups including its Platinum, G, and M12II series, among others. Included in that compatibility list were two new power supplies that Seasonic is showing off at Computex this week: the Seasonic Platinum 1200 and Seasonic M12II Bronze Evo Edition.

SeaSonic Platinum 1200

The Platinum 1200 is a high-end modular power supply that is capable of powering beefy multi-GPU setups. It is 80+ Platinum rated and is up to 92% efficient at 50% load.

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Sesonic M12II Bronze Evo Edition

The Seasonic M12II Bronze Evo Edition is an updated version on past models and includes two SKUs that come in at 750W and 850W. It is a fully modular unit with flat black cables and fan control tech. It is 80+ Bronze and Energy Star rated, and is compatible with Intel's 4th Generation Core processors.

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Also read: The full list of Haswell-compatible Seasonic power supplies @ PC Perspective.

Source: SeaSonic

Podcast #251 - iBuyPower Revolt, Seagate SSHD, NVIDIA Shield Pricing, and more!

Subject: General Tech | May 16, 2013 - 12:11 PM |
Tagged: podcast, video, ibuypower, revolt, Seagate, sshd, nvidia, project shield, shield, haswell, corsair, seasonic, amd, ASUS P5A

PC Perspective Podcast #251 - 05/16/2013

Join us this week as we discuss the iBuyPower Revolt, Seagate SSHD, NVIDIA Shield Pricing, and more!

You can subscribe to us through iTunes and you can still access it directly through the RSS page HERE.

The URL for the podcast is: http://pcper.com/podcast - Share with your friends!

  • iTunes - Subscribe to the podcast directly through the iTunes Store
  • RSS - Subscribe through your regular RSS reader
  • MP3 - Direct download link to the MP3 file

Hosts: Ryan Shrout, Josh Walrath, Allyn Malventano, and Morry Teitelman

Program length: 1:12:25

  1. Week in Review:
  2. News items of interest:
    1. 0:35:00 Power supplies and Haswell
    2. 0:47:00 Curved Lian-Li case - Love it or hate it?
  3. 1:01:00 Hardware/Software Picks of the Week:
    1. Ryan: Are you still there...?
  4. 1-888-38-PCPER or podcast@pcper.com
  5. Closing/outro