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Old 05-20-11, 06:54 AM   #1
sparvu
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Default multiple monitors, higher GPU temperature

Hi,

Is this a normal thing: Im running Ubuntu 10.10 x64 with a Quadro 4000 card.
Im using nvidia drivers: 270.41.06. The GPU temp is somewhere around 50C
idle machine with one display attached to my GPU.

I have noticed if I add another display, as TwinView or Separate Display the GPU
temp increases from 50 to almost 86C :=) !

Is this normal thing ? Anyone else noticed something like this ?

Thanks,
Stefan
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Old 05-20-11, 07:05 AM   #2
JaXXoN
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Default Re: multiple monitors, higher GPU temperature

I guess attaching the second displays forces the GPU into
a higher performance level in order to satisfy the increased
memory bandwidth. For example, I'm running the two outputs
of my 560Ti at a resolution of 5040x1050, each (feeding two
TH2Gs splitting the screen content to six LCDs) - this forces
my GPU into Performance Level 1, even in idle (PL ranging
from 0 to 2).

Maybe the Quadro 4000 has only two performance levels and
so always needs to run at full stream? However, it should be
possible to manually adjust the memory and GPU clock
(using nvidia-settings or changing the values in the GPU BIOS).

regards

Bernhard
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Old 05-20-11, 11:09 AM   #3
sparvu
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Default Re: multiple monitors, higher GPU temperature

Quote:
Originally Posted by JaXXoN View Post
Maybe the Quadro 4000 has only two performance levels and
so always needs to run at full stream? However, it should be
possible to manually adjust the memory and GPU clock
(using nvidia-settings or changing the values in the GPU BIOS).
Quadro 4000 seems have Performance Level 0,1,2.
Yep, correct I have seen the card is switches to a higher performance level
after adding a second monitor. I will try to add the third one to see the effect.

I dont know how can I alter GPU clock using nvidia-settings ...

Thanks,
Stefan
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Old 05-20-11, 11:52 AM   #4
sparvu
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Default Re: multiple monitors, higher GPU temperature

Quote:
Originally Posted by sparvu View Post
Quadro 4000 seems have Performance Level 0,1,2.
Yep, correct I have seen the card is switches to a higher performance level
after adding a second monitor. I will try to add the third one to see the effect.

I dont know how can I alter GPU clock using nvidia-settings ...
My card:

Graphics Processor: Quadro 4000
CUDA Cores: 256
VBIOS Version: 70.00.37.00.03
Memory: 2048 MB
Memory Interface: 256-bit

When I have two displays in use it seems my card uses Performance Level 1:

Graphics Clock: 405 MHz
Memory Clock: 1404 MHz
Process Clock: 810 MHz

Anyone any ideas does NVIDIA support or offer any kind of tool to upgrade card's BIOS version ?

thanks,
Stefan
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Old 05-20-11, 01:09 PM   #5
JaXXoN
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Default Re: multiple monitors, higher GPU temperature

Quote:
Originally Posted by sparvu View Post
Yep, correct I have seen the card is switches to a higher performance level
after adding a second monitor. I will try to add the third one to see the effect.
What exactly do you mean by "add the third one"? You mean adding
another LCD? To my knowledge the Quadro 4000 has only two display
channels.

Quote:
Originally Posted by sparvu View Post
I dont know how can I alter GPU clock using nvidia-settings ...
Please check "man nvidia-settings" for details (it has been a while
since the last time I changed those settings manually, so I can't tell
the magic spell from the top of my head).

regards

Bernhard
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Old 05-20-11, 01:43 PM   #6
sparvu
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Default Re: multiple monitors, higher GPU temperature

Quote:
Originally Posted by JaXXoN View Post
What exactly do you mean by "add the third one"? You mean adding
another LCD? To my knowledge the Quadro 4000 has only two display
channels.
Please check "man nvidia-settings" for details (it has been a while
since the last time I changed those settings manually, so I can't tell
the magic spell from the top of my head).
Right, I meant 3 LCD displays. Ahhh, ok I have to recheck I had the impression
you could add 3 displays to this card. thanks for pointer.

Yep, I will do that. I will check the man page. I had the impression such
options are only available via VBIOS of the card (download the firmware,
change settings, write back the firmware...) I never tried something like
this anyway

Many thanks for help,
Stefan
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Old 05-20-11, 07:36 PM   #7
JaXXoN
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Default Re: multiple monitors, higher GPU temperature

Quote:
Originally Posted by sparvu View Post
Right, I meant 3 LCD displays. Ahhh, ok I have to recheck I had the impression you could add 3 displays to this card. thanks for pointer.
I'm pretty sure that you can only use two out of three outputs at a time.
If you intend to use three LCDs, then you can either add another Q4000
and use SLI Mosaic, or depending on the LCD resolutions, you could
use a TH2G:

http://www.nvnews.net/vbulletin/showthread.php?t=133740
http://www.nvnews.net/vbulletin/showthread.php?t=106517
http://www.nvnews.net/vbulletin/showthread.php?t=126134
(lengthy reads but includes plenty of information)

Quote:
Originally Posted by sparvu View Post
Yep, I will do that. I will check the man page. I had the impression such
options are only available via VBIOS of the card (download the firmware,
change settings, write back the firmware...) I never tried something like
this anyway
It's not that tricky but takes some tweaks, nevertheless:

http://www.nvnews.net/vbulletin/showthread.php?t=158620
http://www.nvnews.net/vbulletin/showthread.php?t=54095

regards

Bernhard
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Old 05-20-11, 08:15 PM   #8
MaDDeePee
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Default Re: multiple monitors, higher GPU temperature

Quote:
Originally Posted by sparvu View Post
Hi,

Is this a normal thing: Im running Ubuntu 10.10 x64 with a Quadro 4000 card.
Im using nvidia drivers: 270.41.06. The GPU temp is somewhere around 50C
idle machine with one display attached to my GPU.

I have noticed if I add another display, as TwinView or Separate Display the GPU
temp increases from 50 to almost 86C :=) !

Is this normal thing ? Anyone else noticed something like this ?

Thanks,
Stefan
GT560TI @ 68C and GT520 @ 55C, four DFP connected in a summer-warm room (~30C), CPU running @ 60 and system temp of 46 C. Online several hours.

86C is overkill, i can't understand how it gets that hot for you....
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Old 05-25-11, 02:58 PM   #9
sparvu
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Default Re: multiple monitors, higher GPU temperature

Quote:
Originally Posted by MaDDeePee View Post
GT560TI @ 68C and GT520 @ 55C, four DFP connected in a summer-warm room (~30C), CPU running @ 60 and system temp of 46 C. Online several hours.

86C is overkill, i can't understand how it gets that hot for you....
Seems to be related to screen resolution ? I forgot to mention: Im using different
types of displays. So the screen resolutions are different.

Tests I have done:

1. 1280x1024, 2 similar screen: I have tried to use 2 x 19" monitors and surprise temp stayed around 56C or so.

2. 1680x1050, 1280x1024, 2 different screens: Im seeing a temp increase up to 85C or
so. The performance level is 1 or 2, Performance Mode: Maximum Performance.

The card is set on Preferred Mode: Adaptive !

could this be the reason for such difference in temp increase ?

stefan
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Old 05-26-11, 12:32 AM   #10
MaDDeePee
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Default Re: multiple monitors, higher GPU temperature

Hmmmm.... i got different resolutions, too.
1280x1024->1650x1050<-1280x1024 and above the middle 1920x1080.

nvidia-settings also reporting highest available performance level ("1" @ GT520 and "2" @ 560TI), no matter that preferred mode is set to adaptive for both cards.

I am NOT using twinview, only Xinerama. Maybe is that the difference?

Very strange....

Quote:
Originally Posted by sparvu View Post
Seems to be related to screen resolution ? I forgot to mention: Im using different
types of displays. So the screen resolutions are different.

Tests I have done:

1. 1280x1024, 2 similar screen: I have tried to use 2 x 19" monitors and surprise temp stayed around 56C or so.

2. 1680x1050, 1280x1024, 2 different screens: Im seeing a temp increase up to 85C or
so. The performance level is 1 or 2, Performance Mode: Maximum Performance.

The card is set on Preferred Mode: Adaptive !

could this be the reason for such difference in temp increase ?

stefan
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Old 05-26-11, 05:49 AM   #11
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Default Re: multiple monitors, higher GPU temperature

GT240 1GB here, with an old CRT monitor on the left and a DFP on the right.
CRT resolution=1024x768, DFP res=1680x1050, using Twinview.
Composite enabled + Kwin effects.

I'm on a light load right now: some browser windows in different virtual desktops, a text editor, nvidia settings app, Konsole open with 2 tabs, etc.
Temp is at 61C, performance level=2 (maximum), adaptive.
Room temp ~30C, since outside is 28C (typical Spanish mediterranean weather).

I only reach 8XC temperatures on full load (playing a 3D game in fullscreen, etc).

Previously I had a laptop with an Nvidia card always at 8XC (idle). It died a year later. Twice. Warranty expired. Probably an Nvidia bugged card. No refund.
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Old 05-26-11, 11:18 AM   #12
sparvu
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Default Re: multiple monitors, higher GPU temperature

Quote:
Originally Posted by DeiF View Post
GT240 1GB here, with an old CRT monitor on the left and a DFP on the right.
CRT resolution=1024x768, DFP res=1680x1050, using Twinview.
Composite enabled + Kwin effects.

I'm on a light load right now: some browser windows in different virtual desktops, a text editor, nvidia settings app, Konsole open with 2 tabs, etc.
Temp is at 61C, performance level=2 (maximum), adaptive.
Room temp ~30C, since outside is 28C (typical Spanish mediterranean weather).

I only reach 8XC temperatures on full load (playing a 3D game in fullscreen, etc).
ok, so it seems that running different on screen resolution does not affect others.
Im not sure what to say: simple it does not make sense unless the driver or the
VBIOS itself it is a crap.

Currently:

X Screen 0: LG Electronics W2242 (DFP-2) 1680x1050 pixels (490x321 millimeters)
X Screen 1: LG Electronics L1953HR (DFP-1) 1280x1024 pixels (382x302 millimeters)

Depth: 24 -> GPU Temp: 86C. Board Temp: 66C. Mem Temp: 79C.

The system is idle. Just browsing the web, no flash, no video nor audio playing.
Go figure.

I will open with nvidia a ticket and probable with PNY and if not I have to change the
card !

stefan
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