Seasonic S12II SS-430GB 430w ATX PSU

Introduction & Specifications


When it comes to silent yet powerful PSU's, Seasonic are often one of the first companies to be mentioned. In business for over 30 years, Seasonic certainly know what they are doing when it comes to manufacturing power supplies and some of their previous models have reached an almost iconic standing among the silent PC community.

Today we'll be looking at Seasonic's latest addition to their silent line-up: the S12II series. Based around the extremely popular S12 series released back in 2005, the S12II series promises quiet operation combined with performance and all the latest connectors required for the modern PC. With models ranging from 330w to 500w, the S12II range certainly isn't aimed at those demanding huge amounts of power (the X900 fills that gap nicely!), but more for those of us who want to avoid our PC's sounding like jet engines.

However, before we get down to business let's find out a little more about Seasonic with this extract taken from their website:

About Seasonic

Since the incorporation of Sea Sonic Electronics Co., Ltd. in 1975, we have maintained our focus on research and development and the production of quality power conversion products.

For the past decades, supported by cutting edge technology based upon a strong research and development team, Sea Sonic Electronics has provided timely and professional solutions to meet many of the IT industry's requirements.

For the future, we will continue our philosophy of dedication; innovation, professionalism and 4G's (Great Technology, Great Quality, Great Service & Great Price) in order to maintain our goal of continued long-term business partnerships and create "win-win" situations for our customers.


The following information has been taken directly from Seasonic's recent press release and Nanopoint's (Seasonic's UK Distributor) website:

The S12II series is made up of 330, 380, 430 & 500 watts units. Each of the Windows Vista™ ready power supply not only meets but also surpasses the stringent 80 PLUS® requirements. This feature combined with a power factor correction factor of 0.99, total computer system energy usage can be reduced by up to 20%, surpassing even the original S12’s performance levels.

Technically, the S12II is a dual 12V rails Double Forward Converter circuit design. High grade Conductive Solid Polymer Aluminum Capacitors are used to further enhance performance and reliability. These capacitors offer improved heat resistance and conductivity over the market standard electrolytic capacitors

• 430W ATX power supply
• Multiple +12-V Outputs: Enhanced +12V current capability broadens utilization possibilities
• Super high efficiency (up to 85%): Optimal solution for lower energy consumption, noise & heat
• Active power factor correction (99% PFC): Reduces line loss & power distortion
• Double forward converter circuit design: Advanced topology for highest efficiency
• Conductive polymer aluminium solid capacitors: Advanced ultra-low resistance, high temperature capacitors on the critical 12V rail
• 12cm ball bearing cooling fan: Increases airflow & lifetime and reduces rotation speed and noise
• Smart & silent fan control (S2FC): Smart thermal control to balance noise & cooling
• Soft-mounting rubber cushions: Reduces fan rotation & vibration noise
• Ultra ventilation (honeycomb structure) Minimized airflow resistance for maximum cooling
• All in one DC cabling design: Supports PC, IPC, workstation, server & dual CPU systems
• Universal video card support: Supports new PCI-E video card technologies
• Universal AC input (full range): Plug & run safely anywhere in the world
• 3 year warranty: Our commitments to superior quality

Seasonic have clearly made some improvements to the S12II series over its S12 predecessor, with the unit boasting up to 85% efficiency over the original S12's 80%. In addition to this, the S12-II has also been fitted with polymer aluminium solid-state capacitors which offer longer life and more stable voltage at higher temperatures than their electrolytic counterparts.

Seasonic S12-II 430w Specs Label

The SS-430GB also features dual +12v rails each rated at 17 amps, with a total output of 360w (30 amps) across both rails simultaneously. Although this may not meet the extreme power requirements of the modern SLI/Crossfire setup, it will certainly be more than enough for any single VGA card PC system.

Now that we've gotten acquainted with Seasonic and the basic specs of the S12II, let's take a look at the unit itself over the next page...
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Most Recent Comments

29-11-2007, 09:38:05

Looks like a great performer for those not wanting to bust their budget on a good PSU.Quote

29-11-2007, 09:39:29

Nice to see some nosie level figures (db-o-meter? ).

Nice job jim.Quote

29-11-2007, 09:41:39

Originally Posted by name='Ham'
Nice to see some nosie level figures (db-o-meter? ).

Nice job jim.
Aye, 'bout time I could produce some graphs on noise levels Quote

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