5000RPM on stock heatsink.

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Mar 27, 2015
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I have the FX-8350 and my water pump in my cooler broke so I RMA'd it back to corsair and meanwhile I am using the stock cooler because I have no other choice and I don't want to buy a new cooler for just a week or two of use. The fan speed is constantly over 4000, sometimes when idle it goes down to around 3500+. Is this okay? Because it sounds like the fan is just barely holding on and can fly off at any moment.
 
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Stock AMD coolers are really only marginal at best. That's why they redesigned it and released the Wraith cooler set. I had a stock Athlon II x4 with one of the Phenom style heatpipe coolers and it was spinning pretty hard on anything over 25% load.

And that was only with a quad core.

TBH the 80mm fans that come with the AMD coolers spin pretty fast because of their size. Think about it from your simple math. Area of a circle is pi*r^2.

For an 80mm fan, it has right around 5000 sq. mm.
For a 90mm fan, it has right around 6100 sq mm.

So - for a 10% increase in diameter it has a 20% increase in fan area. It moves more air at a given RPM.

Compared to a 120mm fan, the 120mm has more than double the fan area, so it can move...
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Colethelion321

Colethelion321

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Feb 3, 2016
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are you overclocking?
the fan going at max is ok but i recommend watching your temps. amd chips are really bad with heat.
 
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Rookie_MIB

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Jul 27, 2013
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Stock AMD coolers are really only marginal at best. That's why they redesigned it and released the Wraith cooler set. I had a stock Athlon II x4 with one of the Phenom style heatpipe coolers and it was spinning pretty hard on anything over 25% load.

And that was only with a quad core.

TBH the 80mm fans that come with the AMD coolers spin pretty fast because of their size. Think about it from your simple math. Area of a circle is pi*r^2.

For an 80mm fan, it has right around 5000 sq. mm.
For a 90mm fan, it has right around 6100 sq mm.

So - for a 10% increase in diameter it has a 20% increase in fan area. It moves more air at a given RPM.

Compared to a 120mm fan, the 120mm has more than double the fan area, so it can move significantly slower to move equivalent air.
 
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13_minutes

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Mar 27, 2015
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4,510


call me a wierdo, but i'm not overclocking it ;D I got the water cooler was on sale and I sent it to corsair so a new one will probably come next week. I'm not too worried because AMD's warranty covers the CPU if it is being used by the stock cooler.
 
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13_minutes

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Mar 27, 2015
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4,510


Well, from what I have read online, the stock AMD coolers suck, really bad. I should be getting my new cooler next week anyway. It's not that big of a deal to me though. Thanks for the info though!
 
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