Looking for the rpm of case fans

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LimePixel

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Jun 23, 2017
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The case in question is the CoolerMaster K350, which has 1 preinstalled case fan in the front and 3 other empty fan spots. I couldn't find the RPM of the preinstalled case fan anywhere.
The reason I'm searching for it is, I want to install another outtake fan in the back of the case, but I want it to be of similar or lower RPM so that air pressure inside the case isn't negative.
 
Solution
geofelt
I would not bother with a rear exhaust fan.
You are correct in that if it is too strong, it will draw in unfiltered air from adjacent openings.
Your case is not a very good one for cooling. If you want more cooling, concentrate on intake.
If noise is not a bother, replace the front fan with a higher capacity fan, but the price you pay will be more noise.
Whatever the front takes in, it will exit SOMEWHERE taking heat with it.

If noise is an issue, your best bet is a second side or bottom intake, but that will
tend to bring in more dust.
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Nick_50

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Jan 28, 2016
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The manual says it is 1200rpm.

But going on rpm alone doesn't mean you can get a rear case fan to create positive pressure, different fan manufacturers have different designs which work in different ways. For example the 200mm fan that came with my case shifts 130 CFM at 800rpm but the fan i have installed only shifts 87 CFM also at 800rpm.

You would either need to find more details for the fan pre installed or just replace it with a fan you know the specs of so that you can balance it with the rear fan to create positive pressure.
 
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geofelt

geofelt

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Oct 9, 2006
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I would not bother with a rear exhaust fan.
You are correct in that if it is too strong, it will draw in unfiltered air from adjacent openings.
Your case is not a very good one for cooling. If you want more cooling, concentrate on intake.
If noise is not a bother, replace the front fan with a higher capacity fan, but the price you pay will be more noise.
Whatever the front takes in, it will exit SOMEWHERE taking heat with it.

If noise is an issue, your best bet is a second side or bottom intake, but that will
tend to bring in more dust.
 
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Solution
L

LimePixel

Prominent
Jun 23, 2017
7
0
510


The front preinstalled fan is 120mm, and the other open spots are 120mm as well, so I removed size as a factor. Will keep all of that in mind though, thank you!



If I add another intake fan, wouldn't that build up hot air faster than the air gets out of the case through openings?
 
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