Dell Dimension 3000 Temperature Sensor?

MceraWV

Honorable
Jan 29, 2016
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10,540
Hello all!

I'm currently working on a personal project of mine, and am centering it around an old Dell Dimension 3000 that I got for free from a friend of mine.
Instead of boring you with the many details of what I'm doing, I'll jump straight to the question: are there any CPU temperature sensors onboard the Dell Dimension 3000? I'm currently running a fully updated version of Debian on it, and have attempted the install of lm-sensors numerous times, as that is the only temperature-monitoring software I've come across for Linux. However, despite my loading of its suggested module (module lm75), it is incapable of finding any sensors.

Knowing this, it would be reasonable to assume that the Dimension 3000 does not come equipped with any temperature sensors, but that is clearly not the case. Due to my specific project, the computer will often shut off due to excessive heat buildup, and present me with an error when rebooting it; something along the lines of "previous shutdown due to thermal event". My question is, if the Dimension 3000 does not have any CPU temperature sensor, than how is it able to shut itself off when it gets too hot? One of my hypotheses was it it could be sensor only detectable by a Windows OS, but this too was thrown out the window when Debian itself gave out an error regarding temperature-related CPU throttling during it's own bootup sequence.

I am incapable of installing a Windows OS due to various reasons, and my issue is not the system's temperature-induced shutoff, but rather it's inability to display temperature readouts despite its obvious capability to monitor it.

TLDR; Is the Dell Dimension equipped with temperature monitoring sensors? I am seeing signs in both the BIOS and OS-bootup sequence that it does, but I am unable to monitor its temperatures.

Thanks in advance!
-MC
 
Solution
Ah, the good old Dimension 3000. I have two of them!

Unfortunately, the Dimension 3000, to my knowledge, has at least no easily-accessible temperature sensor, if any. The CPU fan is a "smart" fan, which has a thermistor that lets the fan's speed change based on the temperature of the exhaust. This is in opposition to most computers' BIOS-based hardware monitoring and fan control. This can be illustrated by connecting the CPU fan directly to a constant +12V supply; it would behave the same as if it were connected to the motherboard, because the motherboard only sends a constant +12V to the fan.

I hope this helps you! Feel free to ask me any more Dimension 3000 questions if needed.

MceraWV

Honorable
Jan 29, 2016
28
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10,540
Sorry for the double Bump but the deadline for my project is fast approaching and I'd like to know for certain if I'd be able to include the Dimension's temperature readouts in it.
 
If the fan has 4 wires it's PWN and controlled by onboard temperature sensor. Some Dells also had ambient sensors in the front panel I/O board. I don't know what to tell you in Linux. In windows there are several utilities to access that reading. PC Wizard, HW Monitor, Throttlestop.
 

racecar56

Distinguished
Sep 13, 2010
52
2
18,565
Ah, the good old Dimension 3000. I have two of them!

Unfortunately, the Dimension 3000, to my knowledge, has at least no easily-accessible temperature sensor, if any. The CPU fan is a "smart" fan, which has a thermistor that lets the fan's speed change based on the temperature of the exhaust. This is in opposition to most computers' BIOS-based hardware monitoring and fan control. This can be illustrated by connecting the CPU fan directly to a constant +12V supply; it would behave the same as if it were connected to the motherboard, because the motherboard only sends a constant +12V to the fan.

I hope this helps you! Feel free to ask me any more Dimension 3000 questions if needed.
 
Solution