General PSU fan replacement question

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Forums › Home Theatre (including HTPC and EPG Collector) › General PSU fan replacement question

casewindow

310 posts

Ultimate Geek

#119131 21-May-2013 20:12

This is not for an HTPC - just a general PC maintenance question.

If I have a 300w desktop PSU with a noisy fan, and the fan is rated to move 40CFM, would I be running a risk of having the PSU overheat if I replaced it with a fan only rated for 20CFM?

kiwijunglist

2981 posts

Uber Geek

ID Verified

#823281 21-May-2013 23:41

yes. why don't you replace it with a temperature controlled fan. I know you can buy 12cm temp controlled fans for ~$15 on trademe.

HTPC / Home automation (home assistant) enthusiast.

B1GGLZ

1961 posts

Uber Geek

#824181 23-May-2013 15:49

Why not just get a new power supply?
300w is probably not enough grunt for most PCs these days. Usually 400w+ would be a starting point.
A reasonable power supply doesn't cost much more than a decent fan.
A lot easier to change the power supply rather than try and change the fan inside it.

kiwijunglist

2981 posts

Uber Geek

ID Verified

#824184 23-May-2013 15:51

300w is plenty for low end pc or htpc

HTPC / Home automation (home assistant) enthusiast.

casewindow

310 posts

Ultimate Geek

#824336 23-May-2013 19:23

Thanks for the info. I'll probably just try and source a similar sized Fan.

This is for a machine that does not need a bigger PSU and is fine, other than the current PSU fan being noisy.

kiwijunglist

2981 posts

Uber Geek

ID Verified

#824357 23-May-2013 19:45

if you can't source the right size you could just remove the internal fan attach the fan to the outside of the PSU as long as the air is travelling through the PSU should be fine. just make a little duct.

HTPC / Home automation (home assistant) enthusiast.

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