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Forum Discussion
12v fan on 5v supply?
Just received my pair of Noctua NF-A4x20 FLX fans I intended on replacing the stock ones to reduce the noise of the refurbished switch I've just bought, which I waited until I received it to check th...
I agree with you.
I would pop the pins out on the new fan, stick the yellow one in the middle and then with the connector of the new fan facing the same way up as the old one (not as in your last picture) swap the red and black around.
I've tried quite a few now and the cabling on the left is definitely correct for v+, v- and sense.
Success. The Pin config has worked.
The two pairs of 20mm deep fans span up briefly and then stopped, like your others. But the deep 28mm work full time. They are noisey!! Having said that, the volume of air they pass is incredible! Nothing is going to get warm inside of here!! I'd almost consider just running one! The noise level is about 55db about half a metre above!
Just having issues, logging into the switch. Will report back if I can control them!
Good work!
I'd be surprised if you can control them though. The originals I have in mine run at around 55db each as well and the speed never changes.
Well, these are the ones that worked. They do spec 40db per fan.
https://www.aliexpress.com/item/32381567224.html?spm=a2g0s.9042311.0.0.27424c4dkENqYg
I've just updated the firmware and now not a peep out of the network ports. :smileymad:
Am going to give it a rest for a few days...
Hi pn23,
Yeah, the fans installed okay. My switch issue was that when I did the firmware update, I guess either it performed a factory reset or I did and came back on the default IP address (192.168.0.239), which is not in my subnet (172.16.0.x). So couldnt see it.
So it is back and working, but noisey, still, even louder in the rack case!! So back to square one.
Was considering the new line of Netgear switches, but don't have any cash to spend at the moment!
pn23, did you progress purchasing a replacement fan yet?
Yeah, other than the Noctuas, I have tried Sunon HA40201V4-1000U-G99 (3 wire with RPM/tacho feedback) and Sunon MF40201V3-1000U-F99 (3 wire with locked rotor detection) and had no luck. Same behaviour as all of the others, they spin up for a second then stop.
I'm completely stumped.
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