[RndTbl] Noisy fan

Kevin McGregor kevin.a.mcgregor at gmail.com
Tue Feb 2 21:47:15 CST 2021

Oops -- old eyes, or something... It's actually got a 4-pin connector, yay.

Also, after investigating further, the fan seems to be running reasonably
well, but in a certain (alas very common) RPM range some kind of harmonic
develops and the noise is... Not something you want to hear more than once.

Hey Alberto, I'd like to try out that fan you have. Maybe its harmonics
won't drive me batty. I'll contact you shortly.


On Tue, Feb 2, 2021 at 9:36 PM Alberto Abrao <alberto at abrao.net> wrote:

> On 2021-02-02 8:56 p.m., Adam Thompson wrote:
> Oh, also, re: 3-pin vs. 4-pin, interesting page that says "don't worry
> about it" (unless you want speed control):
> https://landing.coolermaster.com/faq/how-to-connect-a-3-pin-or-4-pin-fan-to-the-motherboard/
> It is fine to leave the 4th pin flying. Most 4-pin fan connectors allow
> for that, with the notches being tuned for 3-pin connection as the 4th one
> may or may not be present.
> On 2021-02-01 19:23, Adam Thompson wrote:
> IIRC, the fan depends on the CPU, the motherboard socket, and the case
> dimensions/clearance.  I've found a vague reference to this fan being used
> on an AM3 socket, does that describe your situation?  If so, the forum
> poster I found replaced his AVC fan with a "Be Quiet!" brand "Shadow Rock
> TF2" (https://www.bequiet.com/en/cpucooler/1074) which may or may not fit
> your case.  (And holy cow is it ever expensive!)
> The main thing is to keep around the same voltage and amp ratings. It does
> not need to be exact, but close enough will work.
> For CPU fans, the fan used is often dependent on the heatsink design. OEMs
> also take into account other things, such as overall heat on the case and
> amount of auxiliary fans. They tend to use more powerful fans should it
> needs to spin faster not only to cool the CPU, but other components as
> well. Lenovo/HP/Dell usually have CPU fans on the 0.5-0.7A range, while
> aftermarket coolers often go with less, opting to focus on the heatsink
> performance in order to keep noise at bay - but not taking into account
> that they may be needed to cool the other components, as it is often seen
> with OEM designs.
> As an example, your standard Intel Core i5 CPU can be cooled with a paltry
> 0.07A fan when using a CPU cooler from Arctic. They focus on noise
> management as well as cooling performance. Again, the key to achieve that
> is the heatsink.
> Another one: AMD FX-8150, known worldwide as a furnace. OEM cooler from
> AMD/Cooler Master is L O U D. I am using an Arctic Freezer 7A to cool it:
> 0.07A fan, 2000rpm max, but larger and with a vertical heatsink that blows
> air to the back of the case. Paired with auxiliary fans and some tuning, it
> runs stable and cooler than it did when using the OEM jet engine.
> None of that matters, though: he wants to replace the fan only, so we
> should try to match the current one as the heatsink will be the same, not
> to mention all other components that may rely on its reserve air
> capabilities in case of emergency.
> Kevin, if you're still looking for the fan, I have one here that you can
> have and does the job.
> 12V, 0.65A, 70mm. 4-pin, but, as I said, it is fine to leave unplugged.
> It's yours if you need. Feel free to text/call/e-mail me to arrange pickup.
> Kind regards,
> --
> Alberto Abrao
> 204-202-1778 (Landline)
> 204-558-6886 (Mobile)alberto at abrao.net
> _______________________________________________
> Roundtable mailing list
> Roundtable at muug.ca
> https://muug.ca/mailman/listinfo/roundtable
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://muug.ca/pipermail/roundtable/attachments/20210202/d367629d/attachment.htm>

More information about the Roundtable mailing list