Normal operating temperatures ?
#1
Question 
Hi everybody,

I just tried my new rockpro64 4GB board and I installed the 30mm tall heatsink to see how it performs (no fan).

After about 5-10 minutes of stress test using sbc-bench.sh -T 80 I found it to reach 75 °C.
At idle it is sitting at about 43 °C (still passively cooling 15 minutes after the end of the stress test)

The heatsink was installed using some NOCTUA NH-H1 thermal compound I had laying around (I didn't use the thermal pad since I thought that heat transfer would be more effective using standard CPU thermal compound). A very thin layer of thermal paste was applied on all the middle ("raised") surface of the chip.

Do these temps look normal to you? I just did a basic Debian 0.7.9 SD card install.

Thanks  Smile
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#2
(11-04-2018, 09:29 AM)ilovegentoo Wrote: Hi everybody,

I just tried my new rockpro64 4GB board and I installed the 30mm tall heatsink to see how it performs (no fan).

After about 5-10 minutes of stress test using sbc-bench.sh -T 80 I found it to reach 75 °C.
At idle it is sitting at about 43 °C (still passively cooling 15 minutes after the end of the stress test)

The heatsink was installed using some NOCTUA NH-H1 thermal compound I had laying around (I didn't use the thermal pad since I thought that heat transfer would be more effective using standard CPU thermal compound). A very thin layer of thermal paste was applied on all the middle ("raised") surface of the chip.

Do these temps look normal to you? I just did a basic Debian 0.7.9 SD card install.

Thanks  Smile

Any CPU when pushed by longer periods, will rise its temps..

In my opinion, that temps should not be good continuously,
Without a Fan, the thermal compound you used its ok.

RockChip says its rated to max 85, but it also says that at that temps CPU will do a emergency shutdown.
For reliability you shouldn't be using that temps, continuously..

The better option is a fan above it..
BUT if you put a Fan,
IMO should use the thermal PAD, because the thermal pad serves has a vibration absorver for the fan. Wink
  Reply
#3
(11-04-2018, 10:57 AM)tuxd3v Wrote: The better option is a fan above it..
BUT if you put a Fan,
IMO should use the thermal PAD, because the thermal pad serves has a vibration absorver for the fan. Wink
I put an Arctic F8 fan above it to test. Stress test running now. Temps dropped from 70+ to max 40 °C (at full load).
I guess it's highly reccomended to use a fan anyway ....

I'll install these Rockpro64 boards on a 19'' rack shelf with 120mm fans delivering high airflow

EDIT: Just wondering about another thing though ...
Do I also need to cool the 2 rectangular ICs near the CPU or it's not required? At the moment I have the CPU heatsink hanging about 1mm over them
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#4
(11-04-2018, 09:29 AM)ilovegentoo Wrote: After about 5-10 minutes of stress test using sbc-bench.sh -T 80 I found it to reach 75 °C.
At idle it is sitting at about 43 °C (still passively cooling 15 minutes after the end of the stress test)
...
Do these temps look normal to you? I just did a basic Debian 0.7.9 SD card install.

Yup pretty much the same temps here.  (Was also using sbc-bench - cpuminer is what runs with the -T option.)
* ROCKPro64 v2.1 2GB, 16Gb eMMC for rootfs, SX8200Pro 512GB NVMe for /home, HDMI video & sound, Bluetooth keyboard & mouse. Started Bionic minimal - now eoan, Openbox desktop for general purpose daily PC.
* PinePhone BraveHeart on order
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