Intel Pentium Silver with N5000 Laptop, CPU throttle

Message boards : Questions and problems : Intel Pentium Silver with N5000 Laptop, CPU throttle
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ProDigit

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Joined: 8 Nov 19
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Message 93637 - Posted: 12 Nov 2019, 3:08:15 UTC

Hey guys,
I noted that Boinc utilizes the CPU pretty well.
Once the CPU hits 74C, it goes from 2,1Ghz to 1,6Ghz.
I found the cooling solution of the CPU wanting, and added some thermal padding on it, allowing the casing to dissipate some more heat.
I think this CPU should do 80-85C easily.
How can I extend the temperatures so it won't throttle so quickly? (btw, the bottom of the laptop only gets about 40-45C, so adding 10C wouldn't be hot enough to burn myself on it (unless I would keep my hand there for a long time).
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ProDigit

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Message 93641 - Posted: 12 Nov 2019, 3:51:17 UTC

Nevermind!
I found out, that using 2 tasks on 4 threads, loads the CPU to about 98%, and the occasional dips are enough to keep the CPU under 72C, and keep it crunching at 2+ Ghz.
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ProDigit

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Message 93672 - Posted: 13 Nov 2019, 0:28:08 UTC

Another question,
The N5000 has 4 actual cores, running at a max boost speed of 2,7Ghz.

It's not a dual core with HT, but an actual quadcore.

When I set boinc to 50% of CPU, it runs 2 tasks, and actually uses 98% of the CPU, running at ~2Ghz.
When I set Boinc to 45% of CPU, it runs 1 task, and uses 66% of the CPU resources at ~2,66Ghz on all 4 cores.

How come the numbers are so off?
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robsmith
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Message 93681 - Posted: 13 Nov 2019, 8:25:12 UTC

What project(s) are you running, some project applications are "multi-cored", meaning they will use either as many threads (cores) as are available, or the number determined by the project.
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ProDigit

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Message 93692 - Posted: 13 Nov 2019, 17:45:52 UTC - in response to Message 93681.  

My first project is rosetta.
Strangely enough this behavior is only on the N5000.
On my Xeon, rosetta runs the cpu % pretty spot on
eg: 10 core, 20thread means 19 tasks at a time means 98% CPU usage, and only when I set CPU usage to 100%, does Windows' taskmanager actually use all cores to 100%. Although setting it to a lower than 100% number, does distribute all tasks evenly across all cores.
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Message boards : Questions and problems : Intel Pentium Silver with N5000 Laptop, CPU throttle

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