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 Post subject: NZXT Havik 140: NZXT's First CPU Heatsink
PostPosted: Wed Jun 01, 2011 12:35 pm 
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Joined: Fri Mar 04, 2005 9:07 pm
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Location: Vancouver
http://www.silentpcreview.com/nzxt-havik140/


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 Post subject: Re: NZXT Havik 140: NZXT's First CPU Heatsink
PostPosted: Mon Jun 06, 2011 4:01 am 
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Joined: Tue Aug 04, 2009 7:03 am
Posts: 273
Location: Brooklyn, NY
Quote:
When both are placed on the Havik 140, the noise signature acquires an odd pulsing type sound audible at 7V and above. ...the speeds of the two fan samples were very close, within 30~40 RPM of one another.


This is known as a beat tone http://en.wikipedia.org/wiki/Beat_%28acoustics%29


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 Post subject: Re: NZXT Havik 140: NZXT's First CPU Heatsink
PostPosted: Tue Jun 07, 2011 3:33 pm 
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Joined: Thu Jun 08, 2006 1:57 pm
Posts: 99
Location: Virginia
b_rubenstein wrote:


I think Lawrence is correct in calling the phenomena as intermodulation; beat frequencies are a specific instance of the more general concept.

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 Post subject: Re: NZXT Havik 140: NZXT's First CPU Heatsink
PostPosted: Sat Jul 02, 2011 7:58 am 
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Joined: Fri Jan 07, 2005 7:04 am
Posts: 50
Location: Denmark
"Life 30000 Hours"

Am I alone in feeling that ~3½ years seems like a short life for what I assume is the fan?


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 Post subject: Re: NZXT Havik 140: NZXT's First CPU Heatsink
PostPosted: Sat Jul 02, 2011 12:05 pm 
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Joined: Sun Sep 05, 2004 1:51 pm
Posts: 686
Location: Gefle, Sweden
Short for a server class fan which can be expected to run constantly. While towards a decade for most home systems. How many here don't tend to swap out fans every 4-5 years anyway? ;)


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