Fan RPM vs Design

C

Crimsonnaire

Member
Hey, everyone.

Something I've recently been trying to figure out is the difference between fan RPM vs its design (blade slope & number of blades). Here are two pictures for comparison:

Intel_Celeron_E1200_Fan_.jpg

1.jpg


The Intel fan operates at about 2100 RPM and the Cooler Master counterpart at 2200 RPM (just about the same). However, the CM fan has has 2 blades more, and the blades are sloped higher. Given the difference in fan design, one would surmise that the CM offers a significantly higher airflow over the stock Intel fan. Now if this is true, does it mean that the CPU (Celeron E1200 in this case) life will be substantially extended above what is expected from running the stock fan, or are the circumstances that determine CPU longevity (routing design/clock speed/frequency, etc.) such that having an operating temperature margin greater than a certain amount below the normal range inconsequential, and the CPU still lasting the same time? Or is it just the simple principle that the lower the temperature, the longer the CPU lasts, and conversely, the hotter the temperature, the shorter it lasts?

Also, if a fan produces higher airlow over another at the same RPM because of its design, can it be assumed that, in the event of a malfunction such as bearing failure, the better designed fan will still produce adequate cooling despite the lowered RPM?

Any clarification is greatly appreciated.
 
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Well if i last remember correctly, more fins on the fan means more airflow, and it will also have a quieter operation.

On the malfunction thing, umm i guess it would depend on how much lower the rpm's are, but if they both ran at the same speed(in this case 2100) then the "better design" one will be better.
 
all of what you said is true, however the heatsink you put won't give you much more than a degree or 2 difference over the stock HSF.

Also, as to the life, CPUs are pretty much indestructable anyway if kept at stock. Your CPU will become completely obselete way before it dies on you provided it isn't always sat at very high temperatures
 
mx344 said:
Well if i last remember correctly, more fins on the fan means more airflow, and it will also have a quieter operation.

On the malfunction thing, umm i guess it would depend on how much lower the rpm's are, but if they both ran at the same speed(in this case 2100) then the "better design" one will be better.
Click to expand...

More fins generally means more static pressure and thats it, and that is only in the case of fast moving fans.Slower moving fans with large amounts of blades(coolermsater r4 for instance) have mediocre airflow and terrible static pressure. Steeper angles generally mean more static pressure and airflow. Higher RPM usually means more static pressure and airflow.

If you want an aftermarket HSF, look elsewhere, that is nothing more than a redesign of the stock intel HSF.
 
only reason id stick with that design is to keep it somewhat to the stock fan design, however id probably end up looking for something with springscrews...
 
If you have room for it, definitely get a vertical HSF... otherwise, you could get something with better performance with horizontal design, like the 140mm enter.
 
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