Overheating XU4

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Shanther
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Overheating XU4

Unread post by Shanther » Sun Dec 30, 2018 4:42 pm

It has most likely come up a stupid amount of time but I want to have my odroid, running Debian, running at full speed. Currently it is running at 1.4GHz. I use the OS DietPi because it is a simple system and quick to install what I need when I do a fresh install.

I currently have replaced the fan in the stock fan/heat sync with a noctua silent fan. I replaced the heat paste as well.

Anyone know any tricks or hardware that can keep it cool enough that I can run it faster?

I am almost at the stage where I will submerge it in Mineral Oil just to keep it that little bit cooler...then maybe even stick that setup in the fridge as well. :P



Don't get me wrong I love it and if I had the money when the H2 came out I would have bought that in a heartbeat. I cannot wait for the N2 when it comes out. I just need some way to make this system run without overheating and crashing until then.

tedrogers
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Re: Overheating XU4

Unread post by tedrogers » Mon Dec 31, 2018 2:23 am

What's your ambient temperature like?

I live in the UK and it's currently about 18 degrees C in the room without heating on. I have a cheap USB fan on top of the XU4 (passive heatsink) running at full tilt all the time. Even when I heat the room (because I'm using it), I don't have any overheating problems. Without the fan though - different story. It will crash out if it gets too hot.

Temps of the cores (with USB fan) is typically around 50 degrees C, which is nothing. Without the fan it can get to 80 or 90 degrees C.

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mad_ady
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Re: Overheating XU4

Unread post by mad_ady » Mon Dec 31, 2018 2:48 am

You should consider using ondemand governor, so it will be cooler when idle.

tedrogers
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Re: Overheating XU4

Unread post by tedrogers » Mon Dec 31, 2018 3:57 am

Check your boot.ini file:

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nano /boot/boot.ini
Look for this:

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# --- CPU Governor Setup ---
# Uncomment only one line. New governor is set after 90secs after boot.
# ------------------------------------------
# - Performance (Keep all the CPU's at Maximum frequency)
setenv governor "performance"
If not already set to 'ondemand' as above, then exit, and reissue same command with sudo:

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sudo nano /boot/boot.ini
Go back and comment out the "performance" line and uncomment the "ondemand" line:

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setenv governor "ondemand"
Save / writeout. Be careful and accurate with typing.

There is also a GUI tool for this in your desktop OS, if installed.

Shanther
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Re: Overheating XU4

Unread post by Shanther » Mon Dec 31, 2018 7:33 am

My CPU speed is controlled by DietPi.

Attached a picture showing my CPU limits.

When idle it runs a little warm but the instant it actually needs to do something the heat comes hard and fast. Basically I need hardware cooling as it has the best available sortware cooling. I even had the fan tweaked so it runs cooler.

My normal temp inside is about 25 C and if the odroid goes over 70 C it crashes entirely. I don't know how they say it runs fine at 90 C.
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rooted
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Re: Overheating XU4

Unread post by rooted » Mon Dec 31, 2018 7:47 am

What about the big cores? What is the governor settings there? The small cores aren't the problem.

You should set the maximum speed to 1.8ghz on the big cores and think about checking the thermal solution, seems like the TIM or paste has a contact problem.

Are you running an XU4-Q or active cooling?

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mad_ady
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Re: Overheating XU4

Unread post by mad_ady » Mon Dec 31, 2018 3:07 pm

You may also want to limit the little cores to 1.4GHz, instead of 1.5. They are overclocked by default.

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