PfSense 2.0 RC1 makes coils on motherboard very loud
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I have Neoware CA10 with 2 ethernet cards and 1,8 HDD as PfSense box.
The problem is when Pfsense 2.0 ( 32 bit , Full ) RC1 & 2 is loading ( at kernel loading phase ),
coils on motherboard are starting to be very noisy.
They are quiet when CPU is under some load ( more than 15 % ) , but when cpu is idle ( 1 to ~10 % usage ) they are noisy.
Most wierd is that on PfSense 1.2.3 coils are very quiet all the time.
There is also no error on kernel loading phase , all seems to be normal.Also coils , I mean those :
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i didnt know they made noises also, all i used to think was they were made to filter interference and some high frequencies
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i didnt know they made noises also, all i used to think was they were made to filter interference and some high frequencies
they do …
when touching em , the frequency of noise is changing . -
most probably its the vibration caused by the fan etc on touching the coil its just damping.
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Coils can indeed make high pitched squealing noises. Typically, if a motherboard does have this issue, it varies based on VRM load. Since pfSense 2.0 supports more power saving options vs. 1.2.3, it's possible that across the utilization curve, the system power consumption is different. I would recommend disabling (or modifying) power saving options within pfSense (I don't recall offhand where they are), followed by trying to disable or modify power options (including any processor power features like EIST, C1, C1E, etc.) in the system BIOS. The goal is to change the processor's power consumption to find an idle state that doesn't cause your chokes to resonate.
You could also try covering the chokes with epoxy or something like hot glue. Sometimes that can be enough to prevent them from making noise, but the frequency is often such that those methods won't completely dampen the effect.
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Heat-shrink tubing shrunk over them can also help.
Coils can indeed make high pitched squealing noises. Typically, if a motherboard does have this issue, it varies based on VRM load. Since pfSense 2.0 supports more power saving options vs. 1.2.3, it's possible that across the utilization curve, the system power consumption is different. I would recommend disabling (or modifying) power saving options within pfSense (I don't recall offhand where they are), followed by trying to disable or modify power options (including any processor power features like EIST, C1, C1E, etc.) in the system BIOS. The goal is to change the processor's power consumption to find an idle state that doesn't cause your chokes to resonate.
You could also try covering the chokes with epoxy or something like hot glue. Sometimes that can be enough to prevent them from making noise, but the frequency is often such that those methods won't completely dampen the effect.
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they were already "glued" when I bought it.
Well , since Pfsense is very loud AND often drops my PPPOE connection and won't reconnect ( no matter version 1.2.3 or 2 RC1 ),
I am using IPFire , it don't disconnects my PPPOE there also coils are silent. -
If you have powerd on, disable it. If you don't have powerd enabled, try turning it on.
You can also try to enable/disable various BIOS options for power saving.
I've had some PCs that did that before, but it generally got worse with load, not better.
