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Old 09-07-08, 04:50 PM   #1
russofris
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Default Nvidia-settings: GPU Temp reporting incorrectly?

Good afternoon, I have the following card:

frusso@H2SO4:/proc/driver/nvidia/cards$ cat 0
Model: GeForce 8800 GT
IRQ: 16
Video BIOS: 62.92.16.00.05
Card Type: PCI-E
DMA Size: 40 bits
DMA Mask: 0xffffffffff
Bus Location: 01.00.0

When I open nvida settings, the GPUs temp seems extremely high to me:

Attribute 'GPUCoreTemp' (H2SO4:0.0): 72.
'GPUCoreTemp' is an integer attribute.
'GPUCoreTemp' is a read-only attribute.
'GPUCoreTemp' can use the following target types: X Screen, GPU.

Attribute 'GPUAmbientTemp' (H2SO4:0.0): 59.
'GPUAmbientTemp' is an integer attribute.
'GPUAmbientTemp' is a read-only attribute.
'GPUAmbientTemp' can use the following target types: X Screen, GPU.

When I stress the GPU, the readings change to 92/75.

Is it really reading the temperatures off of my card correctly? Perhaps it is reporting in degrees Fahrenheit, as I cannot imagine my chip, nor the ambient temperature surrounding my chip is 75 degrees celcius.

Inspecting inside the case (it's a Cosmos), the card heatsink is only warm to the touch.

Any insight as to why the temp readings are so high?

Thank you,
Frank Russo
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Old 09-07-08, 04:56 PM   #2
russofris
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Default Re: Nvidia-settings: GPU Temp reporting incorrectly?

Additional info:

nvidia-settings: version 1.0 (buildd@yellow) Thu Aug 28 22:49:19 UTC 2008
NVRM version: NVIDIA UNIX x86_64 Kernel Module 177.70 Wed Aug 27 12:46:19 PDT 2008
Attribute 'NvControlVersion' (H2SO4:0.0): 1.17

No overclocking, One Monitor.
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Old 09-07-08, 06:05 PM   #3
russofris
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Default Re: Nvidia-settings: GPU Temp reporting incorrectly?

Additional info:

After downloading and experimenting with NVClock, I have determined the following.

1: NVClock and nividia-settings report the core Temperature differently (NVClock reading 5-10deg lower for core with the same ambient temp)
2: The Nvidia Linux driver has never changed my GPU fan speed (I've actually never heard the fan until activating it with NVCloks)
3: Changing the fan speed in NVClock to 100% brings the core temp down to an acceptable level (75 in nvidia-settings, 66 in NVClock)

Frank
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Old 11-25-08, 12:16 PM   #4
tomaszg
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Default Re: Nvidia-settings: GPU Temp reporting incorrectly?

I have the same issue with my 8800GT:

Model: GeForce 8800 GT
IRQ: 18
Video BIOS: 62.92.24.00.00
Card Type: PCI-E
DMA Size: 40 bits
DMA Mask: 0xffffffffff
Bus Location: 01.00.0

LM_sensors report:
adt7473-i2c-4-2e
Adapter: NVIDIA i2c adapter
[...]
temp1: +63.0C (low = +65.0C, high = +85.0C) ALARM
[...]

(same as nvclock)

while nvidia-settings:
Attribute 'GPUCoreTemp' (xxxx:0.0): 71.
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