Thick 38mm vs 25mm fans?

mkygod · Post by **mkygod** » Thu Feb 18, 2010 7:43 pm

We know that going with a larger slow spinning fan generally results in better airflow/noise performance, due to more surface area and less rpm required.

But what about going with a thicker fan? I'm looking for a really good case fan that can move a lot of air at low RPMs. Would going with 38mm be a practical solution?

I haven't heard of any 38mm fans being tailored for low noise.

ces · Post by **ces** » Thu Feb 18, 2010 10:12 pm

Take a look at the:

Feser/Noiseblocker Triebwerk TK-121 NB-MultiframeÂ® 120mm x 55mm Low Speed Fan - 1200 RPM

It would be interesting to see what it does on 5v

mkygod · Post by **mkygod** » Fri Feb 19, 2010 8:15 am

Thanks for the suggestion. . It seems to be made for cooling radiators due to its great static pressure. Seems mighty expensive for a fan though ($30+).

Any thoughts on the "Silenx iXtrema Pro Case Fan 120MM X 38MM 1200RPM"?

Parappaman · Post by **Parappaman** » Fri Feb 19, 2010 10:32 am

I never had the chance to use one by myself, but SilenX fans are not treated well inhere, be careful!

I only had a short experience with a Scythe Ultra Kaze 1000, and it wasn't anything special. Noisier than any other 1000 RPM fan I ever used, though it surely has its uses. 38mm fans are not made to move more air by the way, they're made to push it harder, creating higher pressure. Best way to move more air per RPM is to get a Slipstream and try to reduce any kind of constriction to the resulting airflow.

ehume · Post by **ehume** » Fri Feb 26, 2010 1:53 pm

I think SPCR is right on when it recommends the Nexus Real Quiet fan. I like mine a lot.