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vantec stealth good?

S

SportyGuy220

Gawd
Joined
Jun 9, 2004
Messages
556
i keep hearing that the vantec stealth is prefered on top of most heatsinks but why? is it becuase of the silence because its 92mm yes but its air flow is only 28cfm. that is very shitty if you ask me. somone tell me why this is used so much.
 
i dont know but cfm isnt everything..............if the surface area of the heatsink is like 50000 square feet...it wouldnt take much air moving across it to cool it off...also the material the heatsink is made out of is a major factor too.....whatever you do though DONT just look at fan speeds and cfm...
 
I use 80mm Stealths in my case, and my parent's case. 4 each for case fans. I grabbed a stock HSF from a friend who got a locked Barton (the sinks have a copper plug inside an aluminum sink, and it's big for an oem sink), and used a 60-80mm adapter and put a Stealth in there for my parent's cpu. Temps dropped 5C with the 2400, and it's quieter now. :)

Stealths aren't made for high air pressure. I wouldn't put one on a restrictive heatsink.
 
Its really really really quiet. When compare to other quiet fans, This one push the most CFM out all of them. * I think*

Im going to switch the vantec stealth for a Panaflo, hopefully it will reduce the heat dramatically so I can push my processor higher
 
Davmx said:
Its really really really quiet. When compare to other quiet fans, This one push the most CFM out all of them. * I think*
Click to expand...

This was very true at the time I was building my computers. Nowadays, Silenx makes fans that push as much air at as many rpm's as Stealth fans, but WAY quieter. They cost a bit more than the Stealth fans, but 14dB is 4x quieter than 20dB. :eek: ;)

My Stealths are still very quiet though. Some Silenx fans would be insane!
 
From my experiences, Vantec Stealths were never silent compared to the other 'silent' fans. I moved from two 80mm Stealths to two 80mm Panaflo(low) fans and it made much less noise. Soon I'll be upgrading to 120mm Silenx fans, I hope they push as much air at 14dBA as they say they do.
 
14db to 20db is not an increase of 4x in loudness. 6db increase is heard as a 50% increase in loudness. To be 4x louder than 14db the fan would have to be about 34db's.

On a side note, if those SilenX 14db 120mm fans do the 58cfm claimed, they are freaking unbelievable at that noise level.

Sejin
 
SejinV said:
14db to 20db is not an increase of 4x in loudness. 6db increase is heard as a 50% increase in loudness. To be 4x louder than 14db the fan would have to be about 34db's.

On a side note, if those SilenX 14db 120mm fans do the 58cfm claimed, they are freaking unbelievable at that noise level.

Sejin
Click to expand...

Double the loudness, add 3dB. The Bel scale is logarithmic. So if you double the power, you are actually adding 0.3 Bel's of air pressure (pretty sure it's pressure, it's been a few years since first year engineering). This is 3dB.

Thus, adding 3 and another 3, you get 4x louder. Scary stuff. Just when you thought a 21dB fan and a 24dB fan were around the same noise level! Having 2 21dB fans makes 24dB too, since there's double the noise.

edit: If I'm wrong, back it up please, I'd like to know! I put a 24dB fan onto my roommate's heatsink, and it sure as hell seemed to be twice as loud as my 21dB Stealths when I tested it.
 
Just remembered the math. Doubling the differential air pressure from a source point, such as adding an identical fan, does this:

The dB rating is already in the logarithmic scale, so when we multiply the source pressure (let's play with 14dB per fan) by 2, our result is: log(2*10^1.4) = log2 + log(10^1.4) = 1.7 Bel = 17dB.

Quadrupling the source pressure (let's assume our sweet 14dB fans again):
log(4*10^1.4) = log4 + log(10^1.4) = log(2^2) + log(10^1.4) = 2*log2 + log(10^1.4) = 2.0 Bel = 20dB.

Et cetera, et cetera. :)
 
10db gives twice the loudness... it might be 3db to double the physical sound pressure but maybe human perception is non-linear itself, i dunno but its definitely 10db from everything ive ever heard or read so i guess that mean we perceive it as log base 2
 
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