Hello Guys,
I would like to know, to compare, what temps are you observing, when at full load, 'Ondemand' Governor and little.big - 1.4 . 1.8 Ghz?
can you Run :
Code:
cat cpufreq-info|grep "current CPU"
Is your heatsink trembling a lot, under full load?
Thanks in Advance, to all.
Regards
(09-14-2018, 05:37 PM) tuxd3v Wrote: Code:
cat cpufreq-info|grep "current CPU"
Hello Guys,
Please Any feedback, is apreciatted
Thanks in Advance.
Happy to oblige, but I do not have a fan, I am not running fanctl (and indeed do not have cpufreq installed)!
I do have 30mm Pine heatsink directly mounted on SoC with Arctic thermal paste, and SBC vertically mounted.
After 10 minutes sbc-bench -T 70 in 1 terminal I get
Code:
$ cat cpufreq-info|grep "current CPU"
I guess when you say "heatsink trembling" in fact you are interested in how much, and how fast the fan is running? (This is for any other respondents - I do not have a fan!)
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09-17-2018, 12:52 PM
(09-17-2018, 03:06 AM) dukla2000 Wrote: Code:
$ cat cpufreq-info|grep "current CPU"
Hello
dukla2000,
Thanks a lot for your Feed-back.
I also have a 30mm tall heatsink, and it works ok, if I don't push it up constantly.
Yes the ideia is checking with people that is using a fan,
their temps, vibration, etc.
Yes its for trying to adjust
fanctl ,
Mabe to max pwm at 58-59C(I tried with max at 55C, but it was 2 times worst than flying in a jet air plain
), so 58-59, is more noise acceptable, in this case the temps should be arroud 53-54, at full throtle..depending on what fan you have etc..
Some people use things that they have around getting dust, and so its difficult to fit all, but a common ground could been found.
Thanks a lot,
09-17-2018, 07:32 PM
(This post was last modified: 09-18-2018, 01:18 AM by romtorwator .)
There are in fact more dependent on the ambient temperature, whether there is a movement of air in the environment,
room with air conditioning is one thing, and another thing without him,
and where the board is placed, in the casing or open, how the casing is vented.
from me will definitely be a response when I get board,
it will be in the
metal casing with a pulling
fan 80x80 , a
30mm heatsink with
fan 40x40 .
and I am inclined to achieve a temperature below +50°C, up to the application of the Peltier element,
with the use of a the Peltier element less than +30°C, at maximum load MCU, here might need to use GPIO for DS18B20 and additional PWM.
I think it will be interesting for your projects
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(09-17-2018, 07:32 PM) romtorwator Wrote: metal casing with a pulling fan 80x80 , a 30mm heatsink with fan 40x40 .
It could be a nice proposal indeed.
The problem of peltier devices, is that they are Current driven.
I was looking at some on the web, and there are some with less current consumption, like 800mw.
But needs to be done carefully, because of the current driven, but I think it could be feasible, for some 10C less.
09-22-2018, 08:04 PM
(This post was last modified: 10-07-2018, 02:07 AM by romtorwator .)
it seems that no additional reinvention is required,
in the case, chassis fan is not connected yet, heatsink 30mm with fan, in the room there is no air conditioning, immobile air, air temperature +25С
My board in SOHO NAS server mode, Samba/NFS/Apache/MySQL/Transmission/OpenVPN,
for a personal internet site, torrent download, Veeam backup of three computers, local network video playback, Remote access to the local network.
the second day I observe a temperature of +39...+ 42C
date, time, cores frequency, temperature, PWM, in parts of logs:
Code:
2018-09-20,00:06:45,408,408,408,408,816,816,39,190
P.S.: -- set a Ratio to PWM:
MAX_THERMAL_TEMP = 50
MIN_THERMAL_TEMP = 40
Attached Files Thumbnail(s)
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(09-22-2018, 08:04 PM) romtorwator Wrote: Code:
2018-09-20,00:06:45,408,408,408,408,816,816,39,190
Nice Setup
Yes the need for a Fan only happens when you push the processor for some time.
In your setup, maybe the hard task would be the backup of the 3 machines..
But it would be nothing like running full load during hours, I think.
09-23-2018, 09:25 PM
(This post was last modified: 10-06-2018, 11:56 PM by romtorwator .)
During the backup it behaves like this:
Code:
2018-09-24,08:13:05,1416,1416,1416,1416,816,816,43,42,152
P.S.: -- set a Ratio to PWM:
MAX_THERMAL_TEMP = 50
MIN_THERMAL_TEMP = 40
These are the maximum values that I have seen, at the moment, the Casing temperature reaches +37С
By the way, I did not use a thermal conductive silicone pad, from the heatsink kit,
between the microcontroller and the heatsink only thermal grease.
I plan to install a thermostat on the basis of DS1821 (in thermostat mode),
connecting to it the exhaust fan of the casing,
the hysteresis of which will be 5 degrees Celsius, shutdown +32C, switching-on of +37C,
which at the physical level will protect the heatsink overheating,
in cases of failure of the fan on the heatsink.
Attached Files Thumbnail(s)
_____________________________________________________________________________________________________________________________________________
09-25-2018, 08:51 PM
(This post was last modified: 09-28-2018, 09:24 PM by romtorwator .)
I installed the thermostat in the casing,
I observe such a temperature cycle:
Code:
2018-09-25,23:39:38,408,408,1416,1416,408,816,40,39,115
Temperature during backup, while working with 8:00:00 to 8:09:15 :
Code:
2018-09-26,07:59:31,408,408,408,408,816,816,37,36,0
P.S.: chassis fan Speed: 2400RPM, Air Flow: 25.15 CFM, thermostat - shutdown <= +32C, switching-on of >= +37C
heatsink 30mm with fan -- set a Ratio to PWM:
MAX_THERMAL_TEMP = 50
MIN_THERMAL_TEMP = 40
I install an exhaust fan in the chassis, fan Speed: 3500RPM, Air Flow: 42.83 CFM (on 17.68 CFM more)
On average, the chassis fan switching-on of 1.5 minutes, then 10 minutes shutdown and so on the cycle,
for example, the time of the switching-on of fan is accurately recorded: 07:17, 07:24, 07:40, 07:54, 08:04, 08:13, 08:21, 08:30, 08:47,
backup time 08:00 - 08:22, 08:30 - 08:40
one day logs file attached:
Attached Files temperature.zip (Size: 69.24 KB / Downloads: 330)
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![[Image: thumbsup.png]](https://forum.pine64.org/images/icons/thumbsup.png){kind=icon}
), so 58-59, is more noise acceptable, in this case the temps should be arroud 53-54, at full throtle..depending on what fan you have etc..