Seasonic Super Tornado 400 watt

Seasonic currently offers three different sizes of the Super Tornado PSU: a 300 watt, 350 watt, and 400 watt model.  We have a Super Tornado 400 to review.  The Super Tornado uses one 120 mm fan blowing into the PSU enclosure.  Warm air exits through the honeycomb rear panel.  This is one of the few power supplies that don’t incorporate an exhaust fan on the rear panel.  Seasonic claims that by using one large fan, more cooling air can be moved thru the unit with less noise. 

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Here is what the Super Tornado 400 looks like with its cover removed.  You can’t miss the big 120 mm fan mounted underneath the cover.  The fan blows air into the power supply and the warm air exits thru the honey combed rear panel.

 

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(Seasonic Super Tornado 400 — click to enlarge)

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(Seasonic Super Tornado 400 — click to enlarge)

The first thing you might notice when looking inside the Super Tornado 400 is that the two large heatsinks are different than the Super Silencer models.  The Tornado’s heatsinks have been reduced in height to make room for the 120 mm fan.  They have also been redesigned with larger surface areas to help dissipate heat into the perpendicular flow of air.  Otherwise the layout and components are very similar to the Super Silencer models.

The Super Tornado 400 incorporates one 120 mm, variable speed fan blowing into the power supply enclosure.  The Superred fan is made by Cheng Home Electronics (CHB12012AS-A) and is rated for a maximum airflow of 61.8 CFM at 1,700 RPM.  This fan uses sleeve instead of ball bearings, which can potentially run quieter.

The fan speed is temperature controlled.  Under relatively light loads the fan is virtually silent.  As the power supply load (and internal temperatures) increases, the fan speeds up and can become more noticeable.  As we will see later, while operating under the same moderately heavy load the Super Tornado is much quieter than the Super Silencer units.

 Aside from the larger fan and modified heatsinks, the Super Tornado is very similar to the Super Silencer.  Here is a close up shot of the Super Tornado 120 mm fan.

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