[snvzz]

4.4 W is the figure given for the SoC on full load.

They also give a lower figure that's 3.x W for full load with the GPU off.

It won't need a heatsink, because with its power draw it won't get above 70C even on full load, while the chip is built for industrial temperature range in operation.

[bullen]

Do you have a URL for those 3.xW and 4.4W claims?

For longevity 60C is better. I'm talking multiple decades at constant permanent full blast here.

[snvzz]

https://www.design-reuse.com/news/52544/starfive-risc-v-jh71...

The interesting part goes:

>As for power consumption, JH7110 is separated into 8 independent power domains. CPU frequency can be configured through software. To achieve a balanced PPA, customers can set the most optimum SoC frequency based on their application scenarios and performance requirements. In sleep mode, the static power consumption of JH7110 is 120 mW. When working on an SBC, with all the main modules under full load, the dynamic power consumption of JH7110 is 4,100 mW. In the application scenarios of soft routers and NAS, where you don’t need GPU and video processing, but only require the dual Ethernet port operation, you can configure the modules on/off through software. And the actual power consumption decreases to 3,300 mW.

So, to summarize:

* 120mW when completely idle.

* 4100mW on full load.

* 3300mW on full load w/o GPU or video processing modules.

This is, I have to say, crazy good relative to rpi4.

>For longevity 60C is better. I'm talking multiple decades at constant permanent full blast here.

Yes, I will at least put a stick-on passive heatsink on mine.

[bullen]

"with all the main modules under full load" does that imply GPU is 100% loaded?

I hope not, and then if I'm right and the GPU is more powerful than the Raspberry 4 one this board will run at 6W or something and then a stick-on heatsink wont do it...

Look at my link to the full copper one if I'm right:

http://www.enzotech.com/cnb_s1l.htm

I received it now and it's great (if it fits) well worth the expensive price!

[snvzz]

>does that imply GPU is 100% loaded?

What I gather from the text is that it's a calculated (from design libraries), rather than measured, full load power draw. Which would make these numbers the upper bound, and thus very good.

I might be wrong.

Either way, as these boards are reaching people, it shouldn't take long until we see measured power draw and temperatures.