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Old 04-07-12, 02:43 AM   #1
Xevious
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Default GTX 680 + linux, What is the max pixelclock?

I was wondering if the maximum pixel clock is still 400 Mhz with the GTX 680 like with older cards?

I heard some people on windows were able to exceed 400 Mhz on windows. I am currently running 2560x1440 @ 400 Mhz @ 100.4 Hz and was curious to see if I could get it up to 125 Hz with a gtx 680.


Currently with my gtx 470 it works @ 400 Mhz:

Code:
(II) Apr 06 12:36:16 NVIDIA(0):   Validating Mode "2560x1440":
(II) Apr 06 12:36:16 NVIDIA(0):     2560 x 1440 @ 100 Hz
(II) Apr 06 12:36:16 NVIDIA(0):     Mode Source: X Configuration file ModeLine
(II) Apr 06 12:36:16 NVIDIA(0):       Pixel Clock      : 400.00 MHz
(II) Apr 06 12:36:16 NVIDIA(0):       HRes, HSyncStart : 2560, 2592
(II) Apr 06 12:36:16 NVIDIA(0):       HSyncEnd, HTotal : 2612, 2692
(II) Apr 06 12:36:16 NVIDIA(0):       VRes, VSyncStart : 1440, 1443
(II) Apr 06 12:36:16 NVIDIA(0):       VSyncEnd, VTotal : 1448, 1480
(II) Apr 06 12:36:16 NVIDIA(0):       H/V Polarity     : +/+
(II) Apr 06 12:36:16 NVIDIA(GPU-0):     BestFit Scaled and BestFit AspectScaled are identical;
(II) Apr 06 12:36:16 NVIDIA(GPU-0):         collapsing BestFit AspectScaled.
(II) Apr 06 12:36:16 NVIDIA(GPU-0):     BestFit Centered and BestFit Scaled are identical;
(II) Apr 06 12:36:16 NVIDIA(GPU-0):         collapsing BestFit Scaled.
(II) Apr 06 12:36:16 NVIDIA(GPU-0):     BestFit Centered         2560x1440
(II) Apr 06 12:36:16 NVIDIA(GPU-0):       Horizontal Taps        0
(II) Apr 06 12:36:16 NVIDIA(GPU-0):       Vertical Taps          0
(II) Apr 06 12:36:16 NVIDIA(GPU-0):       Base SuperSample       x4
(II) Apr 06 12:36:16 NVIDIA(GPU-0):       Base Depth             32
(II) Apr 06 12:36:16 NVIDIA(GPU-0):       Distributed Rendering  1
(II) Apr 06 12:36:16 NVIDIA(GPU-0):       Overlay Depth          32
(II) Apr 06 12:36:16 NVIDIA(0):     Mode is valid.
But dies @ 401 Mhz:

Code:
(II) Apr 07 00:38:37 NVIDIA(0):   Validating Mode "2560x1440":
(II) Apr 07 00:38:37 NVIDIA(0):     2560 x 1440 @ 101 Hz
(II) Apr 07 00:38:37 NVIDIA(0):     Mode Source: X Configuration file ModeLine
(II) Apr 07 00:38:37 NVIDIA(0):       Pixel Clock      : 401.00 MHz
(II) Apr 07 00:38:37 NVIDIA(0):       HRes, HSyncStart : 2560, 2592
(II) Apr 07 00:38:37 NVIDIA(0):       HSyncEnd, HTotal : 2612, 2692
(II) Apr 07 00:38:37 NVIDIA(0):       VRes, VSyncStart : 1440, 1443
(II) Apr 07 00:38:37 NVIDIA(0):       VSyncEnd, VTotal : 1448, 1480
(II) Apr 07 00:38:37 NVIDIA(0):       H/V Polarity     : +/+
(II) Apr 07 00:38:37 NVIDIA(GPU-0):     BestFit Scaled and BestFit AspectScaled are identical;
(II) Apr 07 00:38:37 NVIDIA(GPU-0):         collapsing BestFit AspectScaled.
(II) Apr 07 00:38:37 NVIDIA(GPU-0):     BestFit Centered and BestFit Scaled are identical;
(II) Apr 07 00:38:37 NVIDIA(GPU-0):         collapsing BestFit Scaled.
(WW) Apr 07 00:38:37 NVIDIA(GPU-0):     BestFit Centered ViewPort 2560x1440 exceeds hardware
(WW) Apr 07 00:38:37 NVIDIA(GPU-0):         capabilities.
(WW) Apr 07 00:38:37 NVIDIA(0):     Mode is rejected: Unable to construct hardware-specific
(WW) Apr 07 00:38:37 NVIDIA(0):     mode timings.
Also the driver doesn't like this monitor's EDID. Not a huge deal but the vid card seems to be OK as it correctly scales in BIOS and stuff to native resolution (monitor has no scaler):

Code:
(II) Apr 07 00:40:29 NVIDIA(GPU-0): Skipping Power Connector Check.
(WW) Apr 07 00:40:29 NVIDIA(GPU-0): The EDID read for display device DFP-0 is invalid: the
(WW) Apr 07 00:40:29 NVIDIA(GPU-0):     checksum for EDID version 1 extension is invalid.
(--) Apr 07 00:40:29 NVIDIA(GPU-0):
(--) Apr 07 00:40:29 NVIDIA(GPU-0): Raw EDID bytes:
(--) Apr 07 00:40:29 NVIDIA(GPU-0):
(--) Apr 07 00:40:29 NVIDIA(GPU-0):   00 ff ff ff ff ff ff 00  23 2f 9b 04 00 00 00 00
(--) Apr 07 00:40:29 NVIDIA(GPU-0):   28 15 01 03 a5 3c 22 78  22 6f b1 a7 55 4c 9e 25
(--) Apr 07 00:40:29 NVIDIA(GPU-0):   0c 50 54 00 00 00 01 01  01 01 01 01 01 01 01 01
(--) Apr 07 00:40:29 NVIDIA(GPU-0):   01 01 01 01 01 01 56 5e  00 a0 a0 a0 29 50 30 20
(--) Apr 07 00:40:29 NVIDIA(GPU-0):   35 00 55 50 21 00 00 1a  00 00 00 fc 00 44 55 41
(--) Apr 07 00:40:29 NVIDIA(GPU-0):   4c 2d 44 56 49 0a 20 20  20 20 00 00 00 fc 00 0a
(--) Apr 07 00:40:29 NVIDIA(GPU-0):   20 20 20 20 20 20 20 20  20 20 20 20 00 00 00 fc
(--) Apr 07 00:40:29 NVIDIA(GPU-0):   00 0a 20 20 20 20 20 20  20 20 20 20 20 20 01 11
(--) Apr 07 00:40:29 NVIDIA(GPU-0):   ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff
(--) Apr 07 00:40:29 NVIDIA(GPU-0):   ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff
(--) Apr 07 00:40:29 NVIDIA(GPU-0):   ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff
(--) Apr 07 00:40:29 NVIDIA(GPU-0):   ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff
(--) Apr 07 00:40:29 NVIDIA(GPU-0):   ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff
(--) Apr 07 00:40:29 NVIDIA(GPU-0):   ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff
(--) Apr 07 00:40:29 NVIDIA(GPU-0):   ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff
(--) Apr 07 00:40:29 NVIDIA(GPU-0):   ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff
(--) Apr 07 00:40:29 NVIDIA(GPU-0):
(II) Apr 07 00:40:29 NVIDIA(0): NVIDIA GPU GeForce GTX 470 (GF100) at PCI:132:0:0 (GPU-0)
(--) Apr 07 00:40:29 NVIDIA(0): Memory: 1310720 kBytes
(II) Apr 07 00:40:29 NVIDIA(0): Board ID: 0xcc16
(II) Apr 07 00:40:29 NVIDIA(0): Chip SKU: 275
(II) Apr 07 00:40:29 NVIDIA(0): Chip SKU Mod: 0
(II) Apr 07 00:40:29 NVIDIA(0): Project: 1025
(II) Apr 07 00:40:29 NVIDIA(0): Project SKU: 0006
(II) Apr 07 00:40:29 NVIDIA(0): GPU RAM Type: GDDR5
(--) Apr 07 00:40:29 NVIDIA(0): VideoBIOS: 70.00.21.00.70
(--) Apr 07 00:40:29 NVIDIA(0): Found 2 heads on board
(II) Apr 07 00:40:29 NVIDIA(0): Supported display device(s): CRT-0, CRT-1, DFP-0, DFP-1,
(II) Apr 07 00:40:29 NVIDIA(0):     DFP-2
(II) Apr 07 00:40:29 NVIDIA(0): Bus detected as PCI Express
(II) Apr 07 00:40:29 NVIDIA(0): Detected PCI Express Link width: 8X
(--) Apr 07 00:40:29 NVIDIA(0): Interlaced video modes are supported on this GPU
(II) Apr 07 00:40:29 NVIDIA(0): DFP scaling is supported on this GPU
(II) Apr 07 00:40:29 NVIDIA(0): SPS  : 4
(II) Apr 07 00:40:29 NVIDIA(0): User configuration of GPU PowerMizer is supported
(II) Apr 07 00:40:29 NVIDIA(0):
(II) Apr 07 00:40:29 NVIDIA(0): Mode timing constraints for  : GeForce GTX 470
(II) Apr 07 00:40:29 NVIDIA(0): Maximum mode timing values   :
(II) Apr 07 00:40:29 NVIDIA(0):     Horizontal Visible Width : 32767
(II) Apr 07 00:40:29 NVIDIA(0):     Horizontal Blank Start   : 32767
(II) Apr 07 00:40:29 NVIDIA(0):     Horizontal Blank Width   : 32767
(II) Apr 07 00:40:29 NVIDIA(0):     Horizontal Sync Start    : 32767
(II) Apr 07 00:40:29 NVIDIA(0):     Horizontal Sync Width    : 32767
(II) Apr 07 00:40:29 NVIDIA(0):     Horizontal Total Width   : 32767
(II) Apr 07 00:40:29 NVIDIA(0):     Vertical Visible Height  : 32767
(II) Apr 07 00:40:29 NVIDIA(0):     Vertical Blank Start     : 32767
(II) Apr 07 00:40:29 NVIDIA(0):     Vertical Blank Width     : 32767
(II) Apr 07 00:40:29 NVIDIA(0):     Veritcal Sync Start      : 32767
(II) Apr 07 00:40:29 NVIDIA(0):     Vertical Sync Width      : 32767
(II) Apr 07 00:40:29 NVIDIA(0):     Vertical Total Height    : 32767
(II) Apr 07 00:40:29 NVIDIA(0):
(II) Apr 07 00:40:29 NVIDIA(0): Minimum mode timing values   :
(II) Apr 07 00:40:29 NVIDIA(0):     Horizontal Total Width   : 8
(II) Apr 07 00:40:29 NVIDIA(0):     Vertical Total Height    : 5
(II) Apr 07 00:40:29 NVIDIA(0):
(II) Apr 07 00:40:29 NVIDIA(0): Mode timing alignment        :
(II) Apr 07 00:40:29 NVIDIA(0):     Horizontal Visible Width : multiples of 1
(II) Apr 07 00:40:29 NVIDIA(0):     Horizontal Blank Start   : multiples of 1
(II) Apr 07 00:40:29 NVIDIA(0):     Horizontal Blank Width   : multiples of 1
(II) Apr 07 00:40:29 NVIDIA(0):     Horizontal Sync Start    : multiples of 1
(II) Apr 07 00:40:29 NVIDIA(0):     Horizontal Sync Width    : multiples of 1
(II) Apr 07 00:40:29 NVIDIA(0):     Horizontal Total Width   : multiples of 1
(II) Apr 07 00:40:29 NVIDIA(0):
(--) Apr 07 00:40:29 NVIDIA(0): Connected display device(s) on GeForce GTX 470 at PCI:132:0:0
(--) Apr 07 00:40:29 NVIDIA(0):     DFP-0
(--) Apr 07 00:40:29 NVIDIA(0): DFP-0: 330.0 MHz maximum pixel clock
(--) Apr 07 00:40:29 NVIDIA(0): DFP-0: Internal Dual Link TMDS
(--) Apr 07 00:40:29 NVIDIA(0): DFP-0: Native FlatPanel Scaling is not supported
(--) Apr 07 00:40:29 NVIDIA(0): DFP-0: DFP modes are not limited to 60 Hz refresh rate
(--) Apr 07 00:40:29 NVIDIA(0): DFP-0: DFP is not internal to notebook
(--) Apr 07 00:40:29 NVIDIA(0):
(--) Apr 07 00:40:29 NVIDIA(0): --- EDID for DFP-0 ---
AFIK it works fine in windows as most of the people with the same monitor as me are running windows and I would think if EDID was not being read properly (resolution/modelines) it would be even more problematic on windows.
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Old 04-09-12, 03:55 AM   #2
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Default Re: GTX 680 + linux, What is the max pixelclock?

for my information, what benefit does this bring?
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Old 04-09-12, 07:11 AM   #3
Xevious
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Default Re: GTX 680 + linux, What is the max pixelclock?

Quote:
Originally Posted by Licaon View Post
for my information, what benefit does this bring?
Higher refresh rate.
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Old 04-09-12, 07:04 PM   #4
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Default Re: GTX 680 + linux, What is the max pixelclock?

and what LCD panel supports this higher refresh rate?
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Old 04-09-12, 11:07 PM   #5
Xevious
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Default Re: GTX 680 + linux, What is the max pixelclock?

Quote:
Originally Posted by Licaon View Post
and what LCD panel supports this higher refresh rate?
The one that I am using.
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Old 04-10-12, 08:14 AM   #6
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Default Re: GTX 680 + linux, What is the max pixelclock?

I'm considering purchasing a GTX680 for stereoscopic viewing using a 120Hz monitor. Is > 400MHz pixelclock required for this?
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Old 04-10-12, 08:54 AM   #7
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Default Re: GTX 680 + linux, What is the max pixelclock?

Quote:
Originally Posted by ellson View Post
I'm considering purchasing a GTX680 for stereoscopic viewing using a 120Hz monitor. Is > 400MHz pixelclock required for this?
You can use a 120Hz monitor but you can't use 3D Stereo under Linux with consumer grade ( read GTXxxx ) cards, a Quadro is needed, yes, it's not like on Windows, please call nvidia and complain! no really call them!

...the 400Mhz clock you can ignore


Quote:
Originally Posted by Xevious View Post
The one that I am using.
oh, well even if it's a secret you can tell me it's name, i won't tell anyone, i promise!
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Old 04-10-12, 09:16 AM   #8
Xevious
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Default Re: GTX 680 + linux, What is the max pixelclock?

Quote:
Originally Posted by ellson View Post
I'm considering purchasing a GTX680 for stereoscopic viewing using a 120Hz monitor. Is > 400MHz pixelclock required for this?
>400 Mhz is only needed for 120Hz @ 2560x1440. A normal 1920x1200 (or below) monitor does not need that high of bandwidth for 120hz/3d.

Quote:
Originally Posted by Licaon View Post
You can use a 120Hz monitor but you can't use 3D Stereo under Linux with consumer grade ( read GTXxxx ) cards, a Quadro is needed, yes, it's not like on Windows, please call nvidia and complain! no really call them!

...the 400Mhz clock you can ignore


oh, well even if it's a secret you can tell me it's name, i won't tell anyone, i promise!
It is a YAMAKASI CATLEAP Q270 SE. However the only the older ones were capable of super high refresh rate.
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Old 04-11-12, 03:25 AM   #9
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Default Re: GTX 680 + linux, What is the max pixelclock?

Quote:
Originally Posted by Xevious View Post
It is a YAMAKASI CATLEAP Q270 SE. However the only the older ones were capable of super high refresh rate.
sheesh, nice monitor
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Old 04-21-12, 03:34 AM   #10
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Default Re: GTX 680 + linux, What is the max pixelclock?

So, can anyone from nvidia answer my question?
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Old 04-25-12, 03:17 PM   #11
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Default Re: GTX 680 + linux, What is the max pixelclock?

Xevious, what is your modeline and override settings?

I have the same monitor and its a 2B (older version) as well.

The driver keeps bitching at me about 330 being the max...

EDIT: Got it, was missing an option, but 400 seems to be the hard max on a GTX 480.

Okay if someone from NVIDIA can give a straight answer that the max pixel clock isn't hardcoded in the drivers and a GTX 680 can indeed allow >400, then please reply. It sounds hardcoded if people in Windows can take 4x0 series cards past 400 slightly...
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Old 04-25-12, 04:17 PM   #12
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Default Re: GTX 680 + linux, What is the max pixelclock?

Yeah I am woried that this is a driver limitation so even upgrading to a gtx 680 wont get me past 400 Mhz.
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