Just in case we've overlooked the obvious (to me at least), does Memory Express not carry a replacement?

It has been my go-to spot for local parts for years now .. I just wish there was another location on the east side of the Red somewhere to reduce travel time.

On Mon, Feb 1, 2021 at 7:24 PM Adam Thompson athompso@athompso.net 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!)

On a related note, Google Translate does a horrible job of translating Hungarian to English. ( https://prohardver.hu/tema/milyen_cpu_hutot_vegyek_2/hsz_73341-73360.html)

Its Bulgarian is almost as bad ( https://www.ebowsos.com/ru/products/avc-7020-dv07020b12u-12v-0-7a-4wire-cool... ).

Bottom line: it looks like you currently have a 70mm x 70mm x 20mm fan designed for an AM3 socket.

The closest match I've found so far is: https://www.amazon.ca/Cooler-Master-Am2-Am3-Cpu/dp/B004X5TGO4

Everything else I can find is both enormous and expensive.

YMMV, good luck!

-Adam

On 2021-01-31 17:24, Kevin McGregor wrote:

I have a noisy CPU fan. Does anyone know where I can get a reasonably priced replacement? It makes an annoying whine when above idle speed. See pic below if I can attach it. 3-pin motherboard connection.

Thanks!

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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-... 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 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,

On 2021-02-02 9:47 p.m., Kevin McGregor wrote:

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.

Ball bearing fans will run very long past their prime, sounding *terrible* all the way to the end. Yes, they do move air still, no problem. And yes, they will make you crazy if you're sensitive to it.

Fun fact II: my brand-new Corsair power supply has less than 100 hours of usage, and as much as I tried to not bother, I will end up opening a warranty claim. The reason: a very, *very* subtle "screeching" noise that happens when the temperature is just right for it to spin at a very particular speed. I tried all sorts of witchery to see if it would just leave me alone, but it doesn't, and I can't let it go.

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.

I've tested it and it looks OK. Still, as you found out, you may need to see how it behaves on your particular application to make sure it is not worn out "just right". :S

Kind regards,