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XU4 vs XU4Q

Posted: Mon Mar 23, 2020 11:24 pm
by odroid_newuser
Hi, I am very sensitive to noise. How is the fan noise of the XU4? Is it high pitch? Between the XU4 and XU4Q, which is better at dissipating the heat to prevent thermal throttle? How is the performance of the two compared with each other?

Re: XU4 vs XU4Q

Posted: Tue Mar 24, 2020 1:00 am
by meveric
Normally the XU4Q is clocked slower than the XU4 to prevent overheating.
If you use the standard plastic case with the XU4Q it's heating up even faster as the warm air can't dissipate fast enough.
The fan of the XU4 can be controlled via scripts or system settings, and rather than waiting very later and start at 70~80% speed of the fan it's a good way to start early but only on 40% (or so) fan speed.
That way the fan is rather quiet and keeps the CPU cool even if it has short spikes, if you use the full CPU power over a longer period of time the fan will of cause speed up, and depending on how good the fan is, it might get louder.
Fan quality varies. Some are quiet some are louder.

Re: XU4 vs XU4Q

Posted: Tue Mar 24, 2020 1:45 am
by odroid_newuser
Thanks. About the fan quality... Since it comes with the XU4, is getting a higher quality quiet fan all by luck?

Re: XU4 vs XU4Q

Posted: Tue Mar 24, 2020 2:10 am
by mad_ady
It depends on the ear quality of the user... If you're an audiophile, you'll hate it!

Re: XU4 vs XU4Q

Posted: Tue Mar 24, 2020 2:57 am
by odroid_newuser
If it is high pitch, I won't be able to stand it. Is it?

Re: XU4 vs XU4Q

Posted: Tue Mar 24, 2020 3:15 am
by meveric
The quality of the fan depends a little on luck.
I ordered a hand full of fans and swapped mine, since some of my ODROIDs are running since 2015 I had to swap the fans every now and then.
Some fans are really quite, others were not so much. Some fans were even doing loud scraping sounds, which is when I normally start to replace them.
I have some of my XU4s running 24/7 for several years now. Especially the ones acting as servers for owncloud and alike normally running on a lower fan speed for me and they are mostly quiet.

Re: XU4 vs XU4Q

Posted: Tue Mar 24, 2020 5:08 am
by rooted
It's high pitched and very annoying, I can't hear the high pitch chirp it makes when starting unless close to it but my wife can hear it when in another room with the door closed.

Re: XU4 vs XU4Q

Posted: Tue Mar 24, 2020 3:13 pm
by mad_ady
Wives have super powers! There's no denying it...

Re: XU4 vs XU4Q

Posted: Tue Mar 24, 2020 3:54 pm
by rooted
I think women naturally have the ability to hear higher pitched sounds vs men if I'm not mistaken. My hearing was damaged by having a firearm discharged near my head when I was 7 years old, at least I don't have tinnitus just can't hear sounds higher than around 14 kHz.

Re: XU4 vs XU4Q

Posted: Tue Mar 24, 2020 4:02 pm
by mad_ady
Ouch, sorry about that...
At least you have an excuse for when the wife calls and you don't "hear"... :)

Re: XU4 vs XU4Q

Posted: Wed Mar 25, 2020 6:31 pm
by o_lampe
A few notes about fan and noise from my personal experience:
Fans don't like PWM control. They get noisier and often die early. It's better to use lower_than_spec DC-voltage. The 120x120mm fans cooling my cluster run on 5V instead of 12V. That's possible, because the thermal bottleneck is the MC1-SoC surface area not the airspeed.
I guess it's the same for XU4 or XU4Q with added fan.

Re: XU4 vs XU4Q

Posted: Wed Mar 25, 2020 10:49 pm
by phaseshifter
my 20 cent`s worth..... i`d see if you can clock it up..via code ... the "xu4q" that is and fit a "noctura" to it i fitted an tall blue heat-sink from ameridroid on an xu4 with a copper shim and ran it for quite some time..no problems bit-coining..i also fitted a peltier as well that pumped up the numbers..and i ran the 40 mm constantly....i don't remember the @hominid thread now..it`s been a long time
it also depends on copper shimming between the heat sink and the soc..it is possible to get greater cooling if your talking
"MC-1" i`d just run an usb fan controller off of it...they have ones that come with temp sensors...generally i think the mc-1 was a bad design..it could have been better..others beg to differ

@rooted how are you..p.m me if you have time...

another silly thread ..waffling...lol