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are fan specs reliable?

T

thelastmccabe

Member
I want to get new fans for my cpu heatsink and case, and I'm wondering if the specs on newegg are even reliable. I know from reading some threads that the sound stat is often fudged by the companies; is that also true with the air flow and rpm thing? If so, then that is poop.

If the specs are accurate, in what range would a 'good', 'decent' and 'ultimate' case fan fall in terms of air displacement? Like 50ish for decent, maybe 70 to 80 for good and then more for ultimate (wild guesses)?

Also, where can i buy fans that does not charge a ton for shipping?

edit: took out last part b/c there are 3983 threads on reccommendations, but i still don't know answers to above questions

 
Newegg and other shops get their numbers straight from the manufacturers. And the day manufacturers stop fudging numbers, I'll eat my hat. Usually, the numbers for cfm, rpm, and wattage are good. But with more attention paid nowadays to noise, the dB ratings are, shall we say, kind. Not enough to be totally fraudulent, but a few ticks lower than actual. Take into consideration testing methods and weighting of the data. What that means is "is it tested like it's used?"

Some fans have been found louder than advertised, just poke around for reviews from reputable sources. I like www.silentpcreview.com and www.frostytech.com.

The volume of air moved (cfm) depends on a bunch of things: rpm, diameter, thickness, blade design, restrictions like filters, et cetera. The right amount of airflow changes from machine to machine. Some setups need more than others. Usually, the more cfm, the louder it gets. One thing is for sure, nobody needs a fan that cranks out 100 or more cfm. I learned that the loud way. As for cpu coolers, check what the heatsink maker specs, and start from there.
 
go with brands that are popular and are known for quality. For example, a thermalright xp-90 or xp-120, witha nexus or yate loon fan. Also, the zalman 7000 series coolers are very nice.
 
Do you guys know where to find decent shipping prices on fans? It pains me to pay 5 bucks to ship something that only costs like 8 or 10. I'm pretty sure I'm going with an xp90 unless I see a really good price on a zalman somewhere.
 
wait for a sale on newegg, they usually have free shipping on almost anything. Also the zalman cooler in newegg, last time i checked was 10 bucks cheaper than the xp-90.
 
Nothing is accurate to what you think it means.

Airflow = cfm rating when the fan is dangling in the middle of the room unobstructed.
Airflow in your case = much less esp if you have metal grating or obstructions within 8"

Noise = db rating form a certain distance away from the fan which is dangling in the middle of a room. That distance is rarely supplied to the customer.

Noise in your case =Noise of fan + turbulence added in when air hits objects. Noise is 3-6' away from you. Some frequencies are more annoying than others.
 
This place will give you a cut on the shipping for more that one fan.

frozencpu

I have had good results with them. I am sure there are others that do likewise.
 
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