xu3-lite low noise fan solution [found!]

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xu3-lite low noise fan solution [found!]

Unread postby mrneilypops » Wed Mar 18, 2015 2:06 am

A low noise 5v. fan solution at 17,9 dB(A)

Noctua NF-A4 x10 5V
http://www.noctua.at/main.php?show=prod ... g=en&set=1

I don't want to advertise a supplier but if you are interested pm me and I will let you know where I got mine

The following procedure took me about 20 minutes to complete.
REMEMBER TO PUSH THE FAN CONNECTOR GENTLY BUT FIRMLY BACK ON THE FAN SOCKET SO THAT IT IS ALL THE WAY HOME ;)

1.Remove old fan by unscrewing the four holding screws at each corner and unplug the old fan.
2.Cut the old fan connector and connect to the new fan with the supplied scotch connectors. Plug in the new fan.
see Noctua installation guide http://www.noctua.at/pdf/manuals/noctua ... ual_en.pdf
3.Old screws are too small to secure the new fan, new screws are too big...temporary solution is to use 2 of the noise dampener inserts provided to wedge the fan in position.
Don't worry the noise dampeners are soft and pliable...that is why the look bent in the photo.
4.The xu3-lite case just closes :D securing the fan firmly in position.

Very quiet in operation 8-)
Gone is the harsh mechanical fan noise and with my xu3-lite 1m away from my seat I can barely hear the new fan.
A15 temps = +/-50c @ 'idle' (well... gnome-mplayer running...)

Image

Image



EDIT:
this Noctua fan seems to be running well with the odroid-xu3-fan-control script;
https://github.com/nthx/odroid-xu3-fan-control
viewtopic.php?f=93&t=9306

I will try and update the post after some further testing of the script...

EDIT#2;
Subjectively this script might change 'a great improvement in fan noise levels' to a WOW moment!
The script has very low fan speeds sub 66C and so far with normal usage I can barely detect the Noctua fan kicking in :o
Temps holding to +/-50C with light usage...
Excellent script, I will try a few script autostarts on boot and update with any info...
Last edited by mrneilypops on Tue Aug 18, 2015 12:15 am, edited 1 time in total.
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Re: xu3-lite low noise fan solution [found!]

Unread postby nogareth » Fri Mar 20, 2015 5:07 am

Another way to get some silence when sitting next to your XU3 may be this:

1. Remove Xu3 from case and detach the annoying stock cooler completely. Be careful with this , the adhesive pad used sticks really bad and you could damage your board when being too rough.
2. Use some Alcohol to clean the Exynous Cpu from all pad-remains (and from the fat from your fingers after touching it ;) )
3. get and use some thermal adhesive compound to fix your new , passive cooler taken from an old (AMD) northbridge onto the Cpu, exactly in the position of the stock cooler
4. while the glue dries completely cut open the ventilation slots to make te new cooler pass through the hole .
5. Re-assemble everything, start up ,and ---- TOTAL SILENCE ---- :D

20150319_202613.jpg
20150319_202613.jpg (363.5 KiB) Viewed 30186 times


20150319_202604.jpg
20150319_202604.jpg (368.1 KiB) Viewed 30186 times


My experience so far is a absolute max CPU/GPU temperature now of 70° Celsius. But what should be considered before doing anything like this is ,that you loose probably
all warranty you had , and in my case , there is no way to remove the cooler again unless it falls of by itself ;) . Besides that - cost 4$ for the adhesive is a nice price for passive cooling.

Regards, Martin
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Re: xu3-lite low noise fan solution [found!]

Unread postby robroy » Fri Mar 20, 2015 8:36 am

Looks nice!
Rob Roy, Editor-in-Chief of ODROID Magazine (submit an article | make a donation)
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Re: xu3-lite low noise fan solution [found!]

Unread postby mrneilypops » Fri Mar 20, 2015 9:38 am

@nogareth
Neat solution!
I did say this was a 'low noise fan solution' but hey ho...no worries...all info on this subject passive/active is worth collecting.
I tend to use my XU3-lite for 'lite' tasks...passive cooling might be the next step when I jump up to the 'Full Monty' XU3...

Interesting point;
1. Remove Xu3 from case and detach the annoying stock cooler completely. Be careful with this , the adhesive pad used sticks really bad and you could damage your board when being too rough.


When I removed my stock cpu cooler I had no issue removing it...to be honest there did not seem to be much, if any, of a sticky pad remaining... :o
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Re: xu3-lite low noise fan solution [found!]

Unread postby nogareth » Fri Mar 20, 2015 3:25 pm

My stock cooler was fixed that good, that the printings on top of the cpu are now on the thermal pad!
After removing it there were small white remains of the pad on the edges of the cpu and other components below.
Even if if was not enough to disturb really, you always need to clean properly before you glue a heatsink to an chip if you want it to last.

Oh, and it think I lied a bit : after setting the governor to performance and toying around again my temperatures go up slightly above 80° . But that's still better than before.
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Re: xu3-lite low noise fan solution [found!]

Unread postby mrneilypops » Sat Mar 21, 2015 1:03 am

Just a small update to my original post.
The combo of Noctua fan + odroid-xu3-fan-control script (set to autostart) is working very well and is very quiet in operation.
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Re: xu3-lite low noise fan solution [found!]

Unread postby korhadris » Thu Apr 30, 2015 2:57 am

I bought one of these Noctua fans based on this thread. I have found the stock fan to be more quiet at slower speeds, but the Noctua is much quieter at full speed. The largest improvement is definitely from the script, which keeps the pwm setting at more reasonable levels. :)

I'm curious to see how temperatures are with the new fan, as I noticed that under full load (ffmpeg multicore transcoding) the system is knocking down my clock speeds (often to 900 MHz on the big cores). :( I'll have to come up with a way of swapping back to the stock fan, now that I have cut the leads to install the new fan.
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Re: xu3-lite low noise fan solution [found!]

Unread postby kregerator » Thu Apr 30, 2015 3:18 am

Just got a notification that my fan has arrived. Not sure I'll get to install it tonight but hopefully can get to it soon.
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Re: xu3-lite low noise fan solution [found!]

Unread postby Renegr » Thu Apr 30, 2015 8:09 am

korhadris wrote:I'm curious to see how temperatures are with the new fan


I don't imagine you can get better cooling, because the disadvantage of the fan is, that it is above the heat sink (if I saw the images correctly) while the original one is within it. Means the original fan is more effective in letting the air go through the fins.
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Re: xu3-lite low noise fan solution [found!]

Unread postby kregerator » Sat May 02, 2015 12:32 am

Got my fan, hooked it up but so far, no luck. It won't run. All connections looked good, feel secure. I ran video for a while and fan never came on. After a while I shut it off and great sink definitely feels hot. The fan only twitches. Anybody here have any ideas for me?
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Re: xu3-lite low noise fan solution [found!]

Unread postby kregerator » Sun May 03, 2015 2:30 am

I just searched for this fan, made sure it was the right size and bought it. Didn't think of checking voltage. I have the 12v. Will need to order another. Thanks to @mrneilypops for suggesting that. Should have thought of it myself. If anyone else is looking, make sure to get 5v.
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Re: xu3-lite low noise fan solution [found!]

Unread postby mrneilypops » Sun May 03, 2015 6:57 am

@kregerator
Sorry about your mistake...I am sure you will be OK with the 5 volt fan version...as discussed.
Please let us know how you get on the with the replacement 5 volt version...
I tried to edit my original post but I have an 'image size error' popping up'...no worries...

To All;
Please remember any fan replacement has to be 5 VOLT RATED ;)
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Re: xu3-lite low noise fan solution [found!]

Unread postby kregerator » Sun May 03, 2015 9:23 pm

Yep, I'll post my results when I have the right fan. I had to laugh at myself a bit when I read the box and saw 12v. Heh. Lesson learned.
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Re: xu3-lite low noise fan solution [found!]

Unread postby korhadris » Thu May 07, 2015 7:23 am

Yeah, I almost ordered a 12V one by accident. It was cheaper and easier to find the 12V version. :(
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Re: xu3-lite low noise fan solution [found!]

Unread postby kregerator » Thu May 07, 2015 8:48 am

For the five volt and it seems to be running fine but I didn't have a lot out time to test it yet. Plus I think I put it in upside down, need to fix that. I can say that this fan is extremely quiet though. Totally worth it, even buying two.
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Re: xu3-lite low noise fan solution [found!]

Unread postby kregerator » Thu May 07, 2015 10:44 am

Perhaps a dumb question but how are you all finding the temp of the cpu when running the script? Just looking through the logs or is there a better way? The fan is much better than the stock one.
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Re: xu3-lite low noise fan solution [found!]

Unread postby Renegr » Thu May 07, 2015 2:24 pm

see energy monitor on lubuntu desktop. Unfortunately it won't run very long as it has a memory leak.
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Re: xu3-lite low noise fan solution [found!]

Unread postby odroid » Thu May 07, 2015 4:15 pm

Download this updated EnergyMonitor executable binary and copy it to /usr/local/bin/
https://github.com/hardkernel/EnergyMon ... r/prebuilt

The updated EnergyMonitor fixed some wrong digits display as well as memory leak issue.
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Re: xu3-lite low noise fan solution [found!]

Unread postby kregerator » Thu May 07, 2015 7:31 pm

Thanks!
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Re: xu3-lite low noise fan solution [found!]

Unread postby kregerator » Thu May 07, 2015 7:54 pm

odroid wrote:Download this updated EnergyMonitor executable binary and copy it to /usr/local/bin/
https://github.com/hardkernel/EnergyMon ... r/prebuilt

The updated EnergyMonitor fixed some wrong digits display as well as memory leak issue.


The prebuilt one didn't run, giving the following error.

/usr/local/bin/EnergyMonitor: 5: /usr/local/bin/EnergyMonitor: Syntax error: newline unexpected

I was able to back up a step clone down the repository and follow the instructions which creates and executable that runs but tells me no sensors are available.
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Re: xu3-lite low noise fan solution [found!]

Unread postby odroid » Fri May 08, 2015 10:22 am

You needed to change the file to an executable after downloading.
Code: Select all
chmod +x EnergyMonitor
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Re: xu3-lite low noise fan solution [found!]

Unread postby folgran » Fri May 08, 2015 12:11 pm

What do I do with the old energy monitor executable in /usr/local/bin? Is it okay to just delete it?
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Re: xu3-lite low noise fan solution [found!]

Unread postby odroid » Fri May 08, 2015 12:18 pm

Just delete it..
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Re: xu3-lite low noise fan solution [found!]

Unread postby kregerator » Fri May 08, 2015 8:09 pm

folgran wrote:What do I do with the old energy monitor executable in /usr/local/bin? Is it okay to just delete it?


I started with that and show the file as executable but still get the following error:

/usr/local/bin/EnergyMonitor: 5: /usr/local/bin/EnergyMonitor: Syntax error: newline unexpected

When I clone the repo from github and make it, it runs but doesn't show any readings.

Selection_001.png
Energy Monitor without temps and error message from terminal.
Selection_001.png (65.02 KiB) Viewed 29553 times


Perhaps I'm still doing something wrong or missed some critical step?
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Re: xu3-lite low noise fan solution [found!]

Unread postby Renegr » Sat May 09, 2015 7:04 am

1. ignore the voltage/ampere/watt values, there are no sensors on XU3-lite for it - the values are wrong
2. did you start energymonintor as root (with sudo)?
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Re: xu3-lite low noise fan solution [found!]

Unread postby odroid » Sat May 09, 2015 1:39 pm

Yes.. it must run with sudo as Renegr mentioned.

The latest version should be "1.2" not "1.0".
Download the prebuilt one again and change the file to executable.
Code: Select all
chmod +x EnergyMonitor


And run it
Code: Select all
sudo EnergyMonitor
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Re: xu3-lite low noise fan solution [found!]

Unread postby kregerator » Sat May 09, 2015 8:54 pm

<slaps forehead> duh! Sudo. 'Course. Thanks.
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Re: xu3-lite low noise fan solution [found!]

Unread postby Razhan » Tue May 19, 2015 8:34 pm

Speaking of low noise solutions, this is mine. The fan will only trigger if CPU is at 100% during a long period of time. I am using this: http://www.amazon.com/Logisys-Bridge-Co ... ol+nbridge
for the heatsink and the same noctua as OP. The sink fits almost perfectly (removing the eMMC is going to be hard now, but I never needed to do it before)
Attachments
WP_20150512_20_18_50_Pro.jpg
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Re: xu3-lite low noise fan solution [found!]

Unread postby phaseshifter » Tue May 19, 2015 8:48 pm

interesting that is really cool i am going to fit a sideon 120 cooler master that has no noise at all..next week all being good in the delivery service...
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Re: xu3-lite low noise fan solution [found!]

Unread postby Razhan » Wed May 20, 2015 3:15 am

phaseshifter wrote:interesting that is really cool i am going to fit a sideon 120 cooler master that has no noise at all..next week all being good in the delivery service...

Post some pictures once you finish
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Re: xu3-lite low noise fan solution [found!]

Unread postby mrneilypops » Wed May 20, 2015 3:31 am

@ Razhan
Nice solution!
Great thread...
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Re: xu3-lite low noise fan solution [found!]

Unread postby hbieganowski » Thu May 28, 2015 3:11 am

@Razhan: why did you fixed your fan upside down blowing towards the uC?

Usually the sticker on the top of the fan indicates the "out direction" of the air flow...

BTW: Big but reliable cooling, I hope :)
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Re: xu3-lite low noise fan solution [found!]

Unread postby Razhan » Tue Jun 02, 2015 9:06 am

hbieganowski wrote:@Razhan: why did you fixed your fan upside down blowing towards the uC?

Usually the sticker on the top of the fan indicates the "out direction" of the air flow...

BTW: Big but reliable cooling, I hope :)


Well, there is an explanation, although I'm not very proud of it. Basically, the screw holes in the fan are not symmetrical (there is enough space for the screw heads in one side, but not in the other). To mount the fan blowing air out, I would have need larger screws, and I did not have them at hand

Anyway, right now is very strange for the cpu fan to kick in, I have it there just for emergencies, but 99% of the time the heatsink is enough. However, I live in Spain and summer is coming, so maybe I need to run some tests and see whether I should configure it with positive or negative pressure.
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Re: xu3-lite low noise fan solution [found!]

Unread postby Razhan » Tue Jun 02, 2015 9:21 am

By the way, I am also using nthx's odroid-xu3-fan-control, although I changed a couple of things, mostly, the script is setting the fan speed every 3 seconds (which was spamming my logs), so I changed it to remember the last value and change it only if it was needed
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Re: xu3-lite low noise fan solution [found!]

Unread postby peak3d » Sun Jun 07, 2015 3:22 pm

I'm wondering why the CPU / GPU gets so warm in idle. I have noticed, that using ubuntu on EMMC takes about 0.7W more power then using Android from SD Card (but EMMC plugged in).
Using absolute values this is 4.2W (Ubuntu) to 3.5W (Android). The same devices are plugged in (HDMI / LAN and Bluethooth Dongle, on both BlueTooth connected to an wireless keyboard.

Is there any tutorial or any ideas which component using ubuntu can be switched off and how? Currently my xu3-lite is running with ubuntu 15.04, but the power consumtion was the same with 14.04.
I remember that there was something in media/boot.

My hope is that reducing power consumption reduce the need for fan in idle.

[Edit]
I recompiled the 15.04 ubuntu kernel with following options activated in odroidxu3_defconfig file:

Code: Select all
CONFIG_CPU_FREQ_GOV_POWERSAVE=y
CONFIG_CPU_FREQ_GOV_USERSPACE=y
CONFIG_CPU_FREQ_GOV_ONDEMAND=y
CONFIG_CPU_FREQ_GOV_INTERACTIVE=y
CONFIG_CPU_FREQ_GOV_CONSERVATIVE=y
...
CONFIG_ARM_BIG_LITTLE_CPUFREQ=y


After that my XU3 runs in Interactive mode instead Performance before and consumes 2.8W in idle (including the BlueTooth dongle).
CPU temperature is constant around 45°C and the fan never starts. For me its an big improvement as the fan was most annoying when the TV is not on!
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Re: xu3-lite low noise fan solution [found!]

Unread postby tebruno99 » Tue Jul 28, 2015 9:00 am

Just tried this today on my ODROID-XU4. Got the nice North Bridge cooling kit and was trying to remove the old heatsink snap pins and crushed the little capacitor next to the hole.. I think it was part of the USB3 but its right next to the AMU chip. Sux, already ordered replacement.

Edit: Not sure what I damaged actually. the numbers are to small to read and so far everything is working..
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Re: xu3-lite low noise fan solution [found!]

Unread postby memeka » Tue Jul 28, 2015 10:22 am

tebruno99 wrote:Just tried this today on my ODROID-XU4. Got the nice North Bridge cooling kit and was trying to remove the old heatsink snap pins and crushed the little capacitor next to the hole.. I think it was part of the USB3 but its right next to the AMU chip. Sux, already ordered replacement.

Edit: Not sure what I damaged actually. the numbers are to small to read and so far everything is working..


I think it's inductor L15, connected to the LX pin of the GL3521 USB3 controller. no idea what it does, maybe you can check the datasheet :P
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Re: xu3-lite low noise fan solution [found!]

Unread postby odroid » Tue Jul 28, 2015 11:57 am

@tebruno99
Can you show me the picture of your PCB especially the damaged area?
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Re: xu3-lite low noise fan solution [found!]

Unread postby luxmile » Mon Aug 03, 2015 2:46 pm

Following this topic... :)
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Re: xu3-lite low noise fan solution [found!]

Unread postby tebruno99 » Mon Aug 10, 2015 11:18 pm

I was successfully able to convert to the larger heatsink and 5V fan posted here. The fan is very high quality and will turn on even with very low pwm_duty values. Combined with the interactive governor I'm running owncloud.org, gitlab, local dns, and jira on the odroid at 32C idle with the fan hardly ever kicking on and when it does I can't even hear it. (Before the mod at idle the fan would kick on for 10 seconds every 15 seconds with default fan settings and wasn't so much loud as annoying with the on/off)

Picture of smashed component:
Image

odroid wrote:@tebruno99
Can you show me the picture of your PCB especially the damaged area?
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Re: xu3-lite low noise fan solution [found!]

Unread postby tebruno99 » Mon Aug 10, 2015 11:27 pm

Details:

O-DROID XU4
Noctua NF-A4 x10 5V
Logisys CC2 Heatsink
Thermal heatsink tape from Adafruit

I have chosen purposefully to point the fan output toward the board. I did some smoke tests and the fan tends to pull from the sides so there is no airflow getting down to where the cpu touches the heatsink. I was able to drop the temps a few more degrees and am much more comfortable getting flow to the lower areas of the heatsink instead of just the top few fins. Plus the airflow cools the rest of the components as well at least a little.

I did some basic benchmarks with the new cooling and they are fantastic. Seems that under heavy load the stock cooler just doesn't do enough to keep the clock speed high.

Benchmark Link (includes stock, fan blowing up and fan blowing down)
http://openbenchmarking.org/result/1508 ... 507289BE82

Image
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Re: xu3-lite low noise fan solution [found!]

Unread postby mrneilypops » Mon Aug 10, 2015 11:55 pm

@tebruno99
A very neat solution!
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Re: xu3-lite low noise fan solution [found!]

Unread postby Matoking » Tue Aug 11, 2015 3:33 am

tebruno99 wrote:Details:

O-DROID XU4
Noctua NF-A4 x10 5V
Logisys CC2 Heatsink
Thermal heatsink tape from Adafruit

I have chosen purposefully to point the fan output toward the board. I did some smoke tests and the fan tends to pull from the sides so there is no airflow getting down to where the cpu touches the heatsink. I was able to drop the temps a few more degrees and am much more comfortable getting flow to the lower areas of the heatsink instead of just the top few fins. Plus the airflow cools the rest of the components as well at least a little.

I did some basic benchmarks with the new cooling and they are fantastic. Seems that under heavy load the stock cooler just doesn't do enough to keep the clock speed high.

Benchmark Link (includes stock, fan blowing up and fan blowing down)
http://openbenchmarking.org/result/1508 ... 507289BE82

Image

Really nice! I ordered pretty much the same heatsink and fan a few days ago, can't wait to install them. :D

I was a bit skeptical since the stock heatsink doesn't seem to be warm to touch, but looks like it does have a drastic effect on performance.

EDIT:
Got the new heatsink and fan, installed them and ran some of the same tests as tebruno99. I used Xilence North Bridge heatsink (which despite the different brand name appears to be the same as one used by tebruno99) and their provided thermal pad, some thermal tape to cover the surface not covered by the thermal pad, as well as the same Noctua fan. The tests suggest the performance seems to have actually remained the same as with the stock cooler and heatsink, which suggests it wasn't either installed well enough or the thermal tape doesn't conduct heat well enough. But the main thing is the system is now silent thanks to the less fanatical fan, which is pretty much the most important factor. :D

And for posterity, here's a rough image of my current setup:
Image

EDIT 2:
I noticed the heatsink is slightly tilted to the side, which could leave a really small gap between the CPU and the heatsink. No idea how much this affects the heatsink's performance.
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Re: xu3-lite low noise fan solution [found!]

Unread postby tebruno99 » Tue Aug 18, 2015 4:35 am

The gap probably effects the heatsink performance quite a bit. I used adafruit tape that might be a little thicker maybe? I reproduced the performance measurements with my 2nd odroid-xu4 unmodded. If there is a gap, that could be dangerous as well.

Thanks for the hint on the 2nd brand name. Logisys seems to be completely out of stock everywhere.

Edit:
The heatsinks look similar at first, especially for the mounting hardware however they are different. I can tell cause the part that holds the fan screws is completely different design. It could be also different materials or heat transfer rating. Trying to find out now.
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Re: xu3-lite low noise fan solution [found!]

Unread postby fse » Tue Aug 18, 2015 9:19 pm

@tebruno99 and @Matoking

Nice Solution!!!

It would be interesting know, how long this setup would hold up to the full 4 core load ... when compared with http://forum.odroid.com/viewtopic.php?f=98&t=15558 :D Before throttling starts ...
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Re: xu3-lite low noise fan solution [found!]

Unread postby tebruno99 » Wed Aug 19, 2015 1:28 am

I don't think first time throttled is a very good measure. A better measurement is average time throttled over a task. This is because the first time throttled can be effected by fan speed, was the fan on, how long does it take the fan to spin up. The sudden uptake of load can cause the cpu to throttle instantly but never again when the fan is up to speed.

My results: I could only get 4 core load to throttle the first time later than 5 seconds ( i was able to hit 6 in later testing) if the fan was already running. 3 core throttle took 104 seconds.
Edit:
2 core test will never throttle. The temp is staying below 78C.

Here are my results I ran each test instantly after the previous stopped and I ran 4 core test twice:
Code: Select all
root@odroid:/home/tebruno99# cpu_cur_freq
Cpu0: 1400000
Cpu0: performance
Cpu1: 1400000
Cpu1: performance
Cpu2: 1400000
Cpu2: performance
Cpu3: 1400000
Cpu3: performance
Cpu4: 2000000
Cpu4: performance
Cpu5: 2000000
Cpu5: performance
Cpu6: 2000000
Cpu6: performance
Cpu7: 2000000
Cpu7: performance
root@odroid:/home/tebruno99# cpu_cur_temp
sensor0 : 44000
sensor1 : 42000
sensor2 : 47000
sensor3 : 45000
sensor4 : 42000
root@odroid:/home/tebruno99# ./time2throttle.sh 4
RUN: instances=4 starttemp=47C time=4.6253528595s
root@odroid:/home/tebruno99# ./time2throttle.sh 4
RUN: instances=4 starttemp=50C time=4.01650977135s
root@odroid:/home/tebruno99# ./time2throttle.sh 3
RUN: instances=3 starttemp=54C time=104.154293537s
root@odroid:/home/tebruno99# ./time2throttle.sh 2
RUN: instances=2 starttemp=50C

(still running after 5 min)

I ssh'd to the odroid while the 2 core test was running and read the temps and got the current run time

Code: Select all
tebruno99@odroid:~$ sudo cpu_cur_temp
sensor0 : 78000
sensor1 : 61000
sensor2 : 65000
sensor3 : 77000
sensor4 : 60000
tebruno99@odroid:~$ sudo cpu_cur_temp
sensor0 : 78000
sensor1 : 61000
sensor2 : 65000
sensor3 : 77000
sensor4 : 60000
tebruno99@odroid:~$ sudo cpu_cur_temp
sensor0 : 78000
sensor1 : 60000
sensor2 : 65000
sensor3 : 77000
sensor4 : 60000
tebruno99@odroid:~$ sudo cpu_cur_temp
sensor0 : 78000
sensor1 : 61000
sensor2 : 65000
sensor3 : 77000
sensor4 : 60000
tebruno99@odroid:~$ ps aux | grep burn
root      2207 99.9  0.0    148    12 pts/0    R+   11:20   6:18 burnCortexA8
root      2208 99.9  0.0    148    12 pts/0    R+   11:20   6:18 burnCortexA8
tebruno+  2347  0.0  0.0   3632   704 pts/1    S+   11:26   0:00 grep --color=auto burn
tebruno99@odroid:~$


4 core test with fan on 100% already:
Code: Select all
root@odroid:/home/tebruno99# cpu_cur_temp
sensor0 : 40000
sensor1 : 38000
sensor2 : 42000
sensor3 : 40000
sensor4 : 38000
root@odroid:/home/tebruno99# ./time2throttle.sh 4
RUN: instances=4 starttemp=43C time=8.41439509392s


p.s., the fan is on but still quieter or at worst the same noise level as my water cooled PC desktop (case fans).
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Re: xu3-lite low noise fan solution [found!]

Unread postby fse » Wed Aug 19, 2015 8:51 pm

tebruno99 wrote:A better measurement is average time throttled over a task. This is because the first time throttled can be effected by fan speed, was the fan on, how long does it take the fan to spin up. The sudden uptake of load can cause the cpu to throttle instantly but never again when the fan is up to speed.


Thanks for your ideas, I fixed these issues and ideas and committed the required changes to the script on github, so it pre-cools the CPUs before each run, until the IdleTemp reaches a stable level.

I also set the CPU Fan to 100% throughout the measurement. I can now reach ~3,9s with 4 instances and the stock cooler:

viewtopic.php?f=98&t=15558&p=101430
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Re: xu3-lite low noise fan solution [found!]

Unread postby Matoking » Thu Aug 20, 2015 1:10 am

I installed a thicker thermal pad (1.5 mm Phobya Ultra) on the heatsink to replace whatever no-brand thermal pad that came with the heatsink and I was able to improve the x264-1.6.0 test's result from around 31-32 to about 36 (32 being what you'd get with the stock cooler). fse's time2throttle with 4 instances throttles in about 3 seconds, with 3 in 24 seconds and with 2 it never throttles. Temperature hovers at around 45C with the fan at 100%, default CPU governors (eg. maximum clock speed) active, which required me to edit the script as time2throttle assumes your CPU must have a temperature of 44C or below before the CPU is considered cool.

That said, I think my cleanup of the heatsink and the CPU left a lot to be desired, which likely has some sort of effect on performance. I'm pretty satisfied with the setup so far and I don't really want to get obsessed with improving the cooling performance, so I guess this is the setup I'll run with for now.
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Re: xu3-lite low noise fan solution [found!]

Unread postby tebruno99 » Thu Aug 20, 2015 1:12 am

Another thread is discussing how the stock cpu cooler doesn't actually touch the CPU due to the offset in height from the chips on the other side of the heatsink. You may have also fixed that issue.
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Re: xu3-lite low noise fan solution [found!]

Unread postby Razhan » Tue Sep 08, 2015 5:17 am

@tebruno99 and @Matoking, I'm really glad to see you manage to install the heatsink and fan (with more or less incidents). Truth is I'm really satisfied with the installation. In my case, the fan barely runs at all and when it does the noise does not bother me (most of the time the board is idle). I didn't have any issues during the assembly, although it seems harder in the XU4

Regarding fse scripts, I did get very similar results to tebruno99.
- Two cores will never throttle (I got bored)
- Three cores will throttle, but it will take more than one minute (around one minute and a half)
- Four cores will start throttling really fast, just a matter of seconds (around 5 seconds).

I run the tests some time ago, so the data is by memory. I did not run exactly the same script. I run arch and I remember I had to change some things

I hardly do intensive CPU tasks on it (it is my general purpose server). Mostly its running my VPN servers, Mumble (umurmur), nginx, samba as a DC and other custom stuff I wrote. Only when using it as a minecraft server it was doing most intensive work (I really wanted to see how it handled it). I even keep the A15 cores disabled most of the time
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