Our first cnMatrix installation is away from the people using the network - so this isn’t an immediate problem for me.
I have noticed that the idle fan noise on the EX2028-P is louder than I would promote for use in an office. In this case, I’m used to the MikroTik 24 port PoE switch and the previous generation UniFi 24 port PoE switches. Both are very quiet once they have finished booting (they both slow the fans down significantly - and only speed up if power demand requires it).
Is there any chance the fan speed on the EX2028-P would be reduced further in future firmware updates?
It’s a disappointing no response has come from this question. We have some EX2016M-P and the fans are very loud / tone is annoying for office use and in an open rack on the theatre stage.
Any chance of approving use of upgraded fan, Noctua NF-A4x20 PWM Cambium?
(They work when the pins are rearranged😏)
No I would say they are steady, certainly from a noise perspective. You wouldn’t believe the night and day sound difference the Noctua fans make. Hopefully Cambium can certify for permanent install
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James_Mifsud
(James Mifsud (Certified Instructor))
7
Hi Rob, checking in 12 months later to see how the fans are holding up for you as I’m in a similar boat.
Did you use the omni adaptor (which only wires up GND and +12V) or did you figure out which wire on the Noctua subs in for the yellow wire on the stock fan?
The Noctuas just arrived today. For anybody reading in future, just corroborating Rob’s experience. In short - dead simple.
Remove the 5 black phillips heads and coax the cover off. Remove the old YS Tech fans.
The Noctuas come pinned black, yellow, green, blue. Use a small flat screw driver to gently push down the tabs in the back of the Noctua plug and use a paperclip to push out the black and yellow and swap them around so they’re now yellow, black, green, blue. Plug the rearranged connector into the board, blue wire hanging off the side of the socket disconnected. The tabs on the connector around yellow and green wires perfectly match the socket.
Use a blade to pry the two fixing nuts out of the existing fans and insert them into the Noctuas, and attach the fan, labels facing outside the case. Put the case back together and enjoy peace! The fan speed is voltage controlled, so they’ll slow down after a few seconds on boot up.
I’ve always purchased the three-pin version and adjusted the socket so good to see the 4-pin version doesn’t need any modification to fit the socket, will use that in the future!
I didn’t move the fan nuts and instead used the included rubber mounts as they easily pull through the case and trim, I hoped for extra noise reduction so either way works.
