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
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.
||7 VA |
||21 VA |
|Ultra X-Connect Green UV 500W
||40 VA |
|AOpen Silent Power AO400-12AHN
||18 VA |
The Seasonic S12-430 showed excellent
performance on these power efficiency tests, as we've come to expect from
supplies that feature Active Power Factor Correction. This model was
actually the best we've yet tested under load. Looks like another
excellent power supply from Seasonic.
truly efficient power supply
Seasonic has long
touted the efficiency of their Active PFC-enabled power supplies, and we've
found that the products have lived up to their claims in the past. The S12-430
430W power supply also proves to be no exception. In fact it is one of the most
efficient and quiet power supplies we've yet tested.
The Seasonic S12-430 has no
additional knobs, lights, colours or gimmicks to speak of. It's a plain black
power supply with an adequate number of connectors and some thoughtful extras to
reduce the mess that cables cause in the interior of your
Seasonic S12-430 has excellent performance. It delivers ample power across each
of its rails and overall, is the most efficient power supply we have yet tested.
When compared to a generic 400 watt power supply, it should more than pay for
itself in energy savings over the course of a few years, especially if you leave
your PC On 24/7.
With a retail price of
approximately US$99 (CAN$122) the Seasonic S12-430 is an excellent buy for
any system you are putting together which will need sustained and reliable power
at high wattages.