Cooling

LennStar

Are there pictures of the UPs heatspreader?
The pictures in the shop only show the CPU blank, which explains why UP had heat problems. So how where they solved?

Björn Reichert

In contrast to the UP Board (beta) the heatsink was now bigger.

LennStar

looks... cool

Elie De Brauwer

Is this the official cooling for currently shipping up-boards ? If so, are there any specifications or 3d files available for the cooling ?

LennStar

Yes, thats what I got. CPU at max., Temp at around 65°C (no case)
GPU not tested, uses a bit more energy

Aling

We are shipping official version heatsink solution (8mm) to all the Kickstarters ,however, we are very keen on improving it even more. OK we are a little bit maniac.
At this moment, CPU drop to 480MHz when it starts throttling ( it means when CPU temperature reaches 90C, the CPU frequency starts going down to 480MHz until CPU temperature reduces to 80C, then CPU frequency starts going up again); our goal is to set CPU at 1GHz above during throttling ( no specific time plan yet).

You can refer below for our test condition:
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1. room temperature at 25 C
2. Use Burn-in test program V8.1 for board stress, and HW Monitor program for status checking
3. Test condition and setting in burn-in program http://i.imgur.com/nBZROzO.png
4. Run 48 hrs non-stop and monitor CPU core temperature and frequency by HW monitor program
5. Generate report
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We will soon upload 3D file of UP board+ current 8mm heatsink in community; and we will phase in new heatsink once we find a way to keep it at 1GHz above during throttling. Basically it should not impact your chassis design, because our goal is the heatsink height should be always lower than than USB connector.

If you want to expereince no-throttling at all, we now sell active cooler ( heatsink with fan) at UP shop. By our experience, this fan is really quiet.

LennStar

Can you add a photo of the lower side pls? And sizes?

It could work on the LatePanda, too, depending on size and that one needs some sort of cooling.

Elie De Brauwer

Is there a datasheet and/or 3D files of the active cooling available ? They somehow look (much) higher than the passive cooling shown in the pictures above.

Aling

The active cooling (11.5mm) is slightly higher than current heatsink (8mm), but it is still lower than the pin header.

[Deleted User]

How much current you can draw from the 3.3/5V pins? I'm currently driving a 80mm fan from the 5V pins and seems to work just fine, but I'm a bit worried it might break something. I guess the fan uses less than 100mA @ 5V.

[Deleted User]

you cannot use 3.3V for power applications; it is guaranteed that you can pull max 50mA (according to RPi2 specs) in reality you could do more but no guarantee.

the 5V can be used for power applicatons as it is connected to AC/DC adapter so if you need more current, just change the adapter to value > 4A

Note: there is a specific connector for the FAN-pwr/ctrl so you dont need to use 40-GP connector to power the FAN; but for that you need to use UP-official/verified version.

[Deleted User]

Thanks aaeon. Yes, my intention was just to ask about the official upper limits for drawing current from the power pins, in general (maybe it could mentioned in the GPIO wiki/documentation page). Apparently the stuff connected to the 5V pins can use quite a lot of power although I'd probably use a dedicated power adapter if it needs more than 1A. I had an old two pin fan from my old PC so it was easier to connect it to the GPIO pins after reversing the pin order from the fan's socket.

Nick Tipping

What is the quoted fan life? They can vary hugely and can be a limitation in 24/7 applications.

Aling

Hi, The MTBF is 40,000 HR@40 degreeC . You may check here for specification.

Nick Tipping

Thanks for the response. That's pretty decent for a fan of that size.

Mircea Bogdan

How does one actually measure temp on Ubilinux ?

Dan O'Donovan

cat /sys/devices/platform/coretemp.0/hwmon/hwmon1/temp*_input

Also, I find the 'i7z' utility useful for monitoring CPU core frequencies and temperatures during performance testing

Ken

Just curious, what do temp2, temp3, temp4 and temp5 correspond to?

Dan O'Donovan

Irwin wrote:

Just curious, what do temp2, temp3, temp4 and temp5 correspond to?

CPU core temperatures (in milli-degrees centigrade)

Ken

There are 4 different values returned, assuming these are 4 different sensors, for me it's 36^oC, 36^oC, 40^oC, and 38^oC. Any specifics to what each of these values is?

Dan O'Donovan

The UP board has a quad-core processor, so you're seeing the temperature for each core there. For a clearer insight, I recommend using the 'i7z' tool I suggested earlier.

sudo apt update
sudo apt install i7z
sudo i7z

Mika

Has there been any questions related to higher operating temperature range like down to -25 celsius instead of 0 only? That would make upboard more attractive for outdoor applications in some cold regions.

DCleri

Hi mjj1,

The UP Board SoC does not support extended temperature range.

While on UP Squared there will be the Atom SKU (delayed by Intel SoC availability until now) which should support extended temperature range.