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Case, Power Supply, Fan Reviews
  Product:     Seasonic S12 600w Power Supply  
  Price:     $190 (CAN) / $160 (U.S)
  Supplied By:     Seasonic Electronics
  Author:     Skaal-Tel
  Date:     October 1st, 2005
  Rating:     star star star star star star star star star star

MODTHEBOX would like to thank Celia from Seasonic Electronics for providing the Seasonic S12 600w Power Supply for review.

Seasonic S12 600w Power Supply


For those of us who seek the latest and greatest in powerful gaming technology, there is a constant balancing act between what your existing hardware can handle, and what the new hardware demands. Full SLI rigs with modern dual core or extremely high powered single core processors, and the usual attendant pack of ravenous hard drives and disc burners can bring a sub-standard power supply to its knees. This can be contributed to a lack of cabling and connectors, lack of cooling capacity, or most importantly the amperage available through those multi-coloured strands. The more power hungry cards, such as the 6800s, 7800s, and the x800 series of cards will gladly devour a cheap and poorly made power supply. Make sure you buy quality when it comes to power supplies - this is the ONE piece that should not be, and most often IS ignored. Today in the MTB Labs, we will be evaluating the Seasonic S12 600w Power Supply, a product aimed squarely at bleeding edge performance hardware.


Seasonic Electronics offers 5 different power supplies in this product line which includes 330, 380, 430, 500 and 600 watt models. NVIDIA’s spec for their top of the line cards is 100-110 watts each, and ATI's is at roughly 95. The 500 and 600 watt models are capable of providing 150 watts maximum power on each PCI-Express video card connector, which should be music to any enthusiast's ears. Here are some specifications taken directly from the Seasonic Electronics website:

Seasonic S12 600w Power Supply - Key Specifications:
Seasonic S12 600w Power Supply: Manufactured by Seasonic Electronics
Dimensions: 150mm x 140mm x 86mm (5.9"x5.5"x3.4")
Complies with the latest Intel ATX 12V v2.0 specifications
Total protections: OVP, OPP, and SCP
MTBF > 100,000 hours @ 25°C
PFC harmonics compliance: EN61000-3-2
Double +12V outputs for increased safety and twice the applications
External quiet fan control output
Super high efficiency - the optimal solution for low noise, cooling, and high reliability
Active Power Factor Correction conserves energy
Smart & Silent Fan Control reduces noise without increasing temperature
120mm bottom mounted Quiet Cooing Fan doubles the air flow and lifetime with half the RPM & noise
Ultra ventilation (honey comb structure) maximizes ventilation to minimize heat and noise
Advanced forward converter circuit design for the highest reliability and efficiency
Universal Free AC Input (Full Range) allows you to plug & run safely anywhere in the world
Twisted & Tidy Wires for improved neatness, case airflow, and EMI result
Patented Easy Swap Connector allows you to unplug connectors easily & quickly
Dual 6P VGA Power Connectors supports SLI and dual PCI-E graphic cards
Dr. Cable Cable Management Kit
All-in-1 Connector Design supports PC, IPC, workstation, server, and dual CPU systems
AC Input: 100-240V, 50/60 Hz
Voltage Regulation: ±5% on all lines except -12V line ±10%
24-pin Main power connector (adapter for 20-pin supplied)
Manufacturer's 3 Year Warranty

Silent S12 600 Watt ATX 12V V2.0 PSU
+3.3V +5V +12V1 +12V2 -12V +5Vsb
Orange Red Yellow Yellow Blue Purple
30A 30A 18A 18A 0.8A 2A

Seasonic S12 600w Power Supply
Click image for larger view
Seasonic S12 600w Power Supply
Click image for larger view

The Seasonic S12 600w Power Supply arrived in a pretty snazzy box with blue and orange contrasting colours and a killer whale on the front. The box is clearly labeled with wattage on the front, and specific max amperages on the left side. I have seen enough boxes without specs on them to appreciate this step. Inside the box is a bubble wrapped power supply and the peripherals.

Seasonic S12 600w Power Supply
Click image for larger view
Seasonic S12 600w Power Supply
Click image for larger view
Included with the power supply is some frosted white easy wrap cable sleeving and cable clip, a 3 fan speed controller Molex, various little paper brochures and the requisite power cables. It seems that Seasonic's approach to speed control is very simple, the Molex provided gives you 3 fan headers, 2 labeled "L" for low, and one labeled "H" for high. The secret? the two low connectors are 5v and ground, whilst the high is 12v and ground. For anyone concerned, any fan set to 5v will be almost entirely noiseless. It will also move very little air. According to Seasonic's website: "Automatic temperature adjustment prevents manual errors." However, there is nothing automatic about this and I wish I never had to see marketing claims like this but at least there is a method of quieting fans provided, and that is a cut above many. I should mention that the internal fan is thermally voltage controlled, but that isn't quite what the box hints on the packaging.

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