Directions for Heat Sink?

bronco

I would suspect by using any of the 'legacy' images and exchanging uImage and providing the initramfs -- see below why.
Might be necessary that you check out his branch. You could then use a different target (sun8i_h3_defconfig instead of sun8i_h3_lima_memtester_defconfig) to get a normal uImage + modules to be used.

1. root@opennms:/var/git/H3/linux-sunxi/arch/arm/configs# diff sun8i_h3_*
   
2. 2a3
   
3. > CONFIG_KERNEL_LZMA=y
   
4. 18a20
   
5. > CONFIG_INITRAMFS_SOURCE="initramfs/rootfs.cpio.lzma"
   

Copy code

Then you should be able to use the lima-memtester binary within your normal distro since in ssvb's kernel the Mali stuff works. BTW: I could use all the H3 stuff available the last days here and there also with the A83T the so called "Banana Pi M3" uses. The fixes to use more recent GCC versions and backports of zsram work also with the A83T "SDK"/BSP: http://pastebin.com/xvJ04Pi2

That's good news for customers that were unfortunate enough to buy a Banana Pi M3 since this means chances are great that they could benefit from the 'H3 community' since their vendor is pretty clueless (comparable to the situation here with Xunlong the first months and then the community taking over)

fritz

bronco replied at 2015-12-9 10:33
Seems to be related to DRAM initialisation in the early boot stage: https://groups.google.com/d/ms ...

OK seems fixed now.
With latest patch 672Mhz is OK, test passed.

dvl36

fritz replied at 2015-12-10 04:39
OK seems fixed now.
With latest patch 672Mhz is OK, test passed.

696Mhz - passed.  720Mhz  passed OK.
744Mhz failed after 2 min.
P.S. Using fel-boot-lima-memtester-on-orange-pi-pc-v3
ADD: Covered by small cardboard box OPI PC still running with 720Mhz DRAM frequency.

baltazar

I managed to mount a heat sink and a fan into the transparent acrylic case for the Orange Pi PC. It took some drilling (which is not the best looking) but it works. I connected the fan to 3.3V (pins 1 and 6 on the GPIO) so the fan is a bit more silent.I still have to do some measurements  of the temperature under load...
C:\Users\simon\Documents\OrangePi\SlikeHladilnik\IMG_20151211_212435.jpg

C:\Users\simon\Documents\OrangePi\SlikeHladilnik\IMG_20151211_212450.jpg



C:\Users\simon\Documents\OrangePi\SlikeHladilnik\IMG_20151218_170046.jpg

bronco

baltazar replied at 2015-12-19 00:27
I managed to mount a heat sink and a fan into the transparent acrylic case for the Orange Pi PC. It  ...

Do you really like a noisy fan? Why not both stop overvolting/overclocking and the fan?

hojnikb

Yeah, there is no need for fan or heatsink, if you apply @bronco's sane voltage/frequency settings.

dvl36

bronco replied at 2015-12-19 02:53
Do you really like a noisy fan? Why not both stop overvolting/overclocking and the fan?

Liquid cooling would be the best.

ragavendra

okay, I just ordered what magicse suggested ^^^ . It would be nice if you could post the metrics if possible or may be I will once I receive the order in 15 - 20 days ...... also, hopefully I don't need to cut the fan connector to fit into the GPIO ....... ....

ragavendra

Temporary heat sink using 4 pennies . Pennies before 1996 had 95+ % copper in them

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hfavisado

melanrz replied at 2015-9-23 04:56
The big one its not a good idea,soc and ram is not on same high

The height of the H3 is 1.18mm while the RAM (k4b4g1646q-hyk0) is 1.10mm +- 10% (depending on the solder balls, I suppose). I'm guessing if the thermal interface material were a tiny bit thicker, the 25x35x10mm heatsink would be ideal. a 35x35mm heatsink would be too close to the GPIO headers so I believe the 25x35x10mm heatsink as mentioned by magicse is the best option we have.

If you have time to modify heatsinks available out there, you can fully cover the h3 and the ram on the Orange Pi PC by cutting a larger heatsink to 28mm (distance from top of one RAM chip to the bottom of the other) x 35mm (distance from the far sides of the RAM chips to the lower left corner of the H3.)