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 Audible humming / ticking in fit-PC3 
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Joined: Wed Mar 24, 2010 6:02 pm
Posts: 6
Post Re: Audible humming / ticking in fit-PC3
I second the motion that the circuit design should be changed to remove the humming/ticking sounds.

This is unwarranted, given that previous generations (fitpc2/2i, fitpc original, slim, etc) did not have this issue. Sitting close (<1m) away, this becomes very annoying and defeats the true purpose of a completely silent pc.

I look forward to ordering soon, once new production run is released (with sound issues fixed).


Sat Jan 21, 2012 5:50 am
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Joined: Sat Dec 10, 2011 6:11 pm
Posts: 8
Post Re: Audible humming / ticking in fit-PC3
I totally agree.


Sat Jan 21, 2012 10:27 am
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Joined: Sun Nov 20, 2011 10:43 pm
Posts: 144
Location: Middle Earth
Post Re: Audible humming / ticking in fit-PC3
I have to agree that if the Fit-PC 3 has continuous noise, it's not as suitable
for my use. Currently my old Fit-PC 1, Full Height is about 1 meter away
from my home entertainment center. For practical purposes, it's totally
silent even with a spinning IDE hard drive.

Please consider selling a version that does not include hum or ticking noise.

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Arwen Evenstar
Rivendale, Middle Earth


Sat Jan 21, 2012 1:16 pm
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Joined: Mon Mar 16, 2009 2:11 pm
Posts: 2340
Post Re: Audible humming / ticking in fit-PC3
We appreciate the feedback. There is a trade-off between being audible at maximum power saving and being silent at a slightly higher power consumption. This is determined by implementing skip-mode in the switching power supply. fit-PC3 was designed with skip-mode enabled to minimize power consumption. We will check whether skip-mode can be optionally disabled for users who appreciate silence over power saving.

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Irad Stavi
fit-PC forum admin

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Sat Jan 21, 2012 6:26 pm
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Joined: Thu Jan 19, 2012 5:02 pm
Posts: 2
Post Re: Audible humming / ticking in fit-PC3
Yes, please do consider adding such an option. Power saving is not that important to me.


Sun Jan 22, 2012 1:20 am
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Joined: Sun Nov 20, 2011 10:43 pm
Posts: 144
Location: Middle Earth
Post Re: Audible humming / ticking in fit-PC3
Is the power supply that generates the noise internal to the box?
Or external?

This may make a difference for some of us who can place the CPU unit
where noise would be a problem. But can relocate the power supply part
further away.

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Arwen Evenstar
Rivendale, Middle Earth


Sun Jan 22, 2012 1:45 pm
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Joined: Sun Jan 22, 2012 9:27 pm
Posts: 3
Post Re: Audible humming / ticking in fit-PC3
Arwen wrote:
Is the power supply that generates the noise internal to the box?
Or external?
According to this post it's internal.


Sun Jan 22, 2012 9:32 pm
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Joined: Thu Nov 10, 2011 8:51 am
Posts: 14
Post Re: Audible humming / ticking in fit-PC3
Arwen wrote:
Is the power supply that generates the noise internal to the box?
Or external?

This may make a difference for some of us who can place the CPU unit
where noise would be a problem. But can relocate the power supply part
further away.

Sorry for the confusion. There is an external power supply, but I can't say I've heard any noise from it. The ticking noises described come from the Fit-PC3 itself.

To put things in perspective I can't hear the noise at all from about 2 meters away in a near silent room. So yes, if you can relocate it somewhere a bit further away from your ears then this noise would not be a problem at all. Also if there is anything else making noise in the room then you won't hear the Fit-PC3 noise. Almost anything else will drown the noise out. The noise will only really be an issue in a silent room, and if you're close to the unit.

I also just wanted to thank irads for looking into this further. It's a shame there's a trade-off involved, but anything that can be done is welcome.


Mon Jan 23, 2012 8:15 pm
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Joined: Sun Nov 20, 2011 10:43 pm
Posts: 144
Location: Middle Earth
Post Re: Audible humming / ticking in fit-PC3
Thanks bugger and mirumu for the clarification.

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Arwen Evenstar
Rivendale, Middle Earth


Wed Jan 25, 2012 5:03 pm
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Joined: Sat Jan 09, 2010 4:08 am
Posts: 42
Post Re: Audible humming / ticking in fit-PC3
irads wrote:
We appreciate the feedback. There is a trade-off between being audible at maximum power saving and being silent at a slightly higher power consumption.

I do not understand this tradeoff, but I care about minimizing power usage when idle and minimizing noise when idle as well, even if this comes at the expense of a slightly higher power usage when active, or some minor noise when active.
FWIW, my fit-pc2's idle consumption is probably higher than it should be since I had to disable the extra sleep states in the BIOS (since they cause the fit-pc2 to occasionally fail to wake up for about 5minutes, which is usually seen in the OS's time drifting). So maybe a slightly higher idle consumption is not that terrible.
If the tradeoff could be quantified (at least on the power-consumption side but ideally also on the dB side) it would help.


Wed Feb 01, 2012 4:40 pm
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