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Seasonic S12 600W Power Supply Review
Seasonic S12 600W Power Supply Review - PCSTATS
Abstract: Seasonic's flagship power supply is its S12 600 and computer enthusiasts have put this bad boy in the same category as PC Power & Cooling, Fortron Group and Silverstone units, that's some pretty select company!
 85% Rating:   
Filed under: Power Supply Published:  Author: 
External Mfg. Website: Seasonic May 04 2006   C. Sun  
Home > Reviews > Power Supply > Seasonic S12 600

Testing the Seasonic Powersupply

Power Jitter Observations - Motherboard

Voltage jitter is read by accessing the power options displayed in the motherboard BIOS, with the system obviously in an unloaded state. *All voltages were read from the BIOS of an MSI K8N Neo4 Platinum SLI motherboard.

Listed Voltages Lower Voltage Upper Voltage Jitter
+3.3V 3.3V 3.33V 0.03V
+5.0V 4.99V 5.00V 0.01V
+12V 11.9V 11.9V 0.00V
-12V -11.99V -12.00V 0.01V
-5.0V -4.99V -4.99V 0.00V
+5.0Vsb 5.0V 5.0V 0.01V

The voltage readings from the motherboard are very solid indeed and the Seasonic S12 600 does very well here.

Power Jitter Observations - Multi-meter

Voltage jitter was read by a Mastech MS8230B Multimeter with the system in an unloaded state. During testing the power supply is was still connected to a full computer and voltage values.

Listed Voltages Lower Voltage Upper Voltage Jitter
+3.3V 3.35V 3.35V 0.00V
+5.0V 5.0V 5.0V 0.00V
+12V 11.8V 11.8V 0.00V

It's funny to see the voltage differences between a multimeter and BIOS readings. The voltages as read through the multimeter were solid and did not move one bit during testing.

Seasonic Load Tests Source: Seasonic

When looking at the Seasonic Power Supply test results we see two values, wattage and volt-amps. Since it might not be clear what they measure, here's a brief overview.

The volt-amp (VA) value is how much real power is being consumed by the power supply being tested to provide the wattage (W) value. The higher the VA value is, the more electricity is being used by the power supply. Because no electrical device is 100% efficient, there will always be some loss when converting AC to DC. The closer the volt-amps and wattage figures are to each other, the more efficient a power supply is. This is called the Power Factor: wattage / volt-amps = PF.

Since we're testing with a 120W dummy load, the load on the power supply (wattage) should be as close to this figure as possible. Anything above this load in apparent power describes the overhead and wasted energy (given off as heat) for the particular power supply being tested. For the unloaded tests, the wattage and volt-amp figures should be as close as possible to one another. The lower the figures are, the less power is being used.

Measurements were taken with the Extech 380803 Power Analyzer.

Seasonic Power Load Tests

Power Supply Wattage Test Type Loaded Unloaded
Seasonic SuperTornado 400 W
Active Power 177 W 6 W
Apparent Power 182 VA 7 VA
Vantec iON2 350 W Active Power 192 W 10 W
Apparent Power 277 VA 21 VA
Antec TruePower 330 330 W Active Power 195 W 22 W
Apparent Power 289 VA 38 VA
Ultra X-Connect Green UV 500W 500 W Active Power 193W 22 W
Apparent Power 307 VA 40 VA
AOpen Silent Power AO400-12AHN 400 W Active Power 179W 9 W
Apparent Power 275 VA 18 VA
Seasonic S12-430 430 W
Active Power 179W 6W
Apparent Power 180VA 9VA
PC Power and Cooling Turbo-Cool 510 Express/SLI

510 W

Active Power

200 W

29 W
Apparent Power 202 VA 32 VA
HEC Ace Power 580UB

580 W

Active Power

183 W

12 W
Apparent Power 272 VA 26 VA
HEC Win 550UB 550 W Active Power 184W 10W
Apparent Power 263VA 22VA
Akasa PowerPlus AK-P550FF 550 W
Active Power 194W 38W
Apparent Power 197VA 40VA
AOpen Prima Power AO700-12ALN 700 W
Active Power 172W 3W
Apparent Power 181VA 9VA
PC Power & Cooling Turbo-Cool 1KW 1000 W
Active Power 205W 25W
Apparent Power 207VA 32VA
Seasonic S12 600 600 W
Active Power 164W 7W
Apparent Power 173VA 9VA

The Seasonic S12 600 is definitely very efficient in converting AC to DC and does not waste much power as heat requiring only 164W of energy to power the 120W dummy power load.

Hello Mr. Efficient

With power requirements of high end systems climbing ever higher, enthusiasts and manufacturers have been putting more emphasis on higher quality power supplies. While this has increased prices slightly, consumers are equipping PCs with better power supplies now and that is a good thing.

There are a lot of expensive power supplies on the market but unfortunately most are expensive due to gimmicks like flashy LED fans, see through PSU containers and detachable cables. What you should look for instead is for a power supply that has passed industry certification (like nVIDIA's SLI certified PSUs) and do your homework by posting in computer forums asking the more experienced users what they think of certain models. This way you can get yourself a truly reliable power supply, not some pretty piece of junk.

Seasonic has swept through the enthusiast community pretty quickly and for good reasons too. Its 30 years of experience manufacturing power supplies means Seasonic knows how to deliver the goods and that's exactly what has made the brand so popular. Simply put, Seasonic power supplies are rock solid and give even the most hardcore users great peace of mind.

The new flagship Seasonic S12 600 has a high standard to live up to but as you saw it had no problems. While reading the specs listed on the Seasonic power supply might not seem as impressive as other models available, please keep in mind that they are sustained which means the Seasonic S12 600 can deliver a true 600W of power while under load and not just during peak times.

The performance of the Seasonic S12 600 was excellent as expected from a Seasonic power supply. With a retail price of $171 CDN ($155 US, £83 GBP) , the Seasonic S12 600 is expensive but compared to other power supply's in that price range offers you better value.

If you're looking for a new power supply for that hot rod system of yours, make sure you check out what Seasonic and the S12 600 has to offer. You'll definitely be impressed as has everyone who has used a Seasonic power supply.

PCSTATS Recommended Product Award

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< Previous Page © 2022 PCSTATS.com Power Supply Reviews...»


Contents of Article: Seasonic S12 600
 Pg 1.  Seasonic S12 600W Power Supply Review
 Pg 2.  Appearence and Physical Specifications
 Pg 3.  More details on the S12 600
 Pg 4.  — Testing the Seasonic Powersupply

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