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Old 10-05-06, 07:53 AM   #1
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Default nVidia GF7600GS temperature sensor via iC?

Hi,

currently I am wondering if there is any way to monitor the temperature of my nVidia GeForce 7600GS via the iC interface of the kernel, like CPU temperature. Mostly all modern mainboards feature a temperature sensor chip connected to the iC (or nowdays SM) bus of the computer...so I asked myself if the hardware monitoring of the GeForce cards works via iC as well an if there is a driver module for those chips.

Or does the temperature monitoring of the nVidia cards work different than the temperature monitoring of mainboards?

I am not really satisfied with the nvidia-settings tool to read the temperature, because I'd like to integrate that temperature in my conky display and conky supports the kernel iC interface (/sys/bus/i2c/...) quite well...

So if there is any possibility to do that please let me know!

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Old 10-08-06, 06:12 AM   #2
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Default Re: nVidia GF7600GS temperature sensor via iC?

All NV4x/G7x GPUs contain a sensor build into the GPU. The sensor and the temperature reading mechanism are inside the GPU. It isn't connected to the i2c-bus. On highend 7800GTX/7900GTX cards and perhaps on some other boards you can find an external sensor chip aswell. This chip is then connected to the i2c-bus.

The nvidia drivers export the temperature using the NV-CONTROL extensions and further there's NVClock which can directly read the temperature from the card. (use nvclock from cvs; the code is a little buggy, I need to add a correct offset for the 7600gs but for the rest it works well)

In the near future nvclock will feature a dbus daemon for hw monitoring purposes, so that external apps can easily read out the temperature, fanspeeds and other parameters.
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Old 10-08-06, 03:26 PM   #3
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Default Re: nVidia GF7600GS temperature sensor via iC?

The nvidia-settings tool provided by the nVidia driver reads the temperatures of my 7600GS as well, but I hoped that there is a way to read the temperature of the card without any additional tools...
Sadly I don't know too much about coding, but maybe someone may write a kernel module doing the job of the hardware monitoring part of nvclock or the nvidia-settings tool - this would make things a lot easier I think...

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Old 10-11-06, 01:06 PM   #4
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Default Re: nVidia GF7600GS temperature sensor via iC?

There's no need for a kernel module to do that.
You could use
Code:
nvclock -i | grep temp
to get a reading.
IIRC there are some sensor-applets that can grab the temperature through nvclock as well. I think gkrellm supports that.
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Computer stuff I've owned at one time or another:
CPUs: K6-3 400, Duron 600, Thunderbird 1400, Barton 2500, Duron 1800, A-64 3700+, C2D E7200
Motherboards: Shuttle Via MVP, Asus A7V, Asus A7V133, Asus N8X-VM400, Abit NF7, Abit UL8, Asus P5Q Pro
Graphics Cards: TNT2, GF 2 MX, GF 2 Pro, GF4 MX, GF FX 5500, GF 6600, GF 7600 GT, GF 9800GT
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Old 10-11-06, 03:37 PM   #5
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Default Re: nVidia GF7600GS temperature sensor via iC?

Actually I was looking for a method that does not depend on any programs but works with a kernel-space driver, because the output of any program may change with time and using additional programs wastes lots of resources compared to using a interface provided by a kernel driver...
So there should be a kernel module reading the temperature of the graphics card like nvidia-settings or nvclock do and provide this information via a kernel interface.
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