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625 posts

Ultimate Geek
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Topic # 95035 24-Dec-2011 14:06
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Hi all,

I have a Netgear GS724TS switch (24port, gigabit etc) its its noise as hell. Pulled it apart today to give it a clean and confirm if the fans were replaceable, which they are. Conveniently Netgear uses a standard 3-pin connector like that found on motherboards.



Per the above image it looks like the fans are only 5v which makes replacing them that little bit harder. Does anyone know of somewhere I can get cheap 5v 40mm fans that should be reasonably quiet?

Alternatively can I replace it with a normal 12v fan and just run it at 5v?

Any tips or tricks I need to know? What should I watch out for?

I thought something like this might do the job:
http://www.quietpc.com/nz-en-nzd/products/40mmfans/mini-kaze

Thanks

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74 posts

Master Geek
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  Reply # 561199 24-Dec-2011 14:24
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You should be able to pull off the silver label and put some CRC onto the shaft. There may be a plastic plug that you need to remove as well.

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Uber Geek
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  Reply # 561204 24-Dec-2011 14:50
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40mm fans are a nightmare, I've lost track of the number of devices that I've seen them dead in.

I picked up my last lot of them from an electronics store in Sydney, which isn't going to help you..


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  Reply # 561231 24-Dec-2011 17:04
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http://parts.digikey.co.nz/1/3/5v-40mm-sunon-fans

Looking quickly this may be the one you want (3 wire 5V 40mm Fan)

http://parts.digikey.co.nz/1/1/621553-fan-5vdc-40x10mm-1-2w-8-0cfm-tac-kde0504pfv1-11-ms-af-gn.html

$8.35 with $39.00 shipping (or free shipping with orders over $125) 


-- or --

http://www.ebay.com/itm/Delta-40-mm-5-V-Fan-5000-RPM-Delta-AFB0405LD-/270834221931?pt=LH_DefaultDomain_0&hash=item3f0efa436b#ht_823wt_954

Seems a lot cheaper and will probably get to you quicker :-(





625 posts

Ultimate Geek
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  Reply # 561245 24-Dec-2011 18:30
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Any reason why I can't just use a 12v 40mm fan? Surely that would kill two birds with one stone, get a fan that's designed to make less noise and then run it at 5v to reduce the RPM, thus making it even quieter?

I don't really want to replace the existing fans with the same model, I have no reason to believe they are dying. A 40mm fan at 5000+ RPM is never going to be quiet.

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  Reply # 561248 24-Dec-2011 18:47
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It depends..

For example

http://media.digikey.com/pdf/Data%20Sheets/Sunon%20PDFs/KDE1204PFV2%2011.MS.A.GN.pdf

Which have a starting Voltage of 6V so 5V would not even start to run.

You would have to find the data sheet of any 12V fans you get and see what the starting voltage is.


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  Reply # 561250 24-Dec-2011 18:57
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3 Wire Fans use voltage to control the speed of the FAN (as far as I know) and uses the 3rd wire to find the RPM and reduces the voltage to reduce the RPM of the Fan.

This will mean the 12V fan will not get 5V all the time

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  Reply # 561252 24-Dec-2011 19:15
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I'm also after some for a similar Cameo / Trednet switch. Fans are the same spec and also really noisy




Generally known online as OpenMedia, now working for Red Hat New Zealand as a Solution Architect for all things Linux, Virtual and of course Cloud. Still playing with MythTV and digital media on the side.



625 posts

Ultimate Geek
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  Reply # 561256 24-Dec-2011 19:27
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I think I might just give the 12v's ago, I can't think of any reason why they would damage the switch and for a whole $20 its not really worth fretting.

Will keep you posted, in one of the reviews for the link I post one person mentioned they replaced the fans in a HP switch.

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  Reply # 561449 25-Dec-2011 21:37
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If the fan doesn't run fast enough to remove heat from inside the switch then your switch could overheat. I would try to find fans that have ballbearings to make them last longer, but may not be available. Last time I looked for a 40mm fan i gave up...




Qualified in business, certified in fibre, stuck in copper, have to keep going  ^_^

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