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Old 17th October, 2015, 01:20 AM
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danrok danrok is offline
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Join Date: March 2003
Location: Great Britain
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Most older PSUs had a fan on the back, blowing out warm air.

Newer quality units tend to have a bigger fan on the top, drawing air in to the PSU. The air exits out of the back all the same.

Of course, some have a fan on top and at the back.
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