![]() Their conclusion: it doesn’t really matter, as the difference, if any, was very slight. ![]() Their reports and blogs ranged from advanced “guesswork” to some actual tests. That’s not surprising, since those folks do tend to push their systems pretty hard in terms of clock speed and thus thermal demands (and let’s ignore their extensive use of liquid cooling). What I found was that many gamers and overclockers-and there are plenty of them out there-have investigated the issue. I did some research on forced-air cooling using fans, and surprisingly found nothing in the formal academic journals or even in less-formal student papers and projects. If that’s not enough to confuse the designer who just wants to ensure that there’s enough airflow and that the benefits of adding a fan for forced airflow are not wasted, I don’t know what is. Instead, there are two somewhat contradictory answers: first, it really doesn’t matter, second, it depends on circumstances. It turns out there is no single answer to this modest question. Instead, what we are looking at here is clear, unblocked ports on both entrance and exit ends of the airflow path. Note that the answer has nothing to do with avoiding obvious mistakes such as having the airflow intake or exhaust ports situated where they will be blocked by a tabletop, closely adjacent enclosures, or even a cabinet wall.
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