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Old 03-10-07, 11:00 PM   #1
orphaze
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Default Way to list a Geforce card's supported resolutions?

I'm looking for a way to list all the supported resolutions of my GeForce4 MX 4000 AGP card.

I've got a 1080P (native, Westinghouse LVM-37W3 to be precise) set being delivered on Saturday and I was wondering if I would be able to output the full 1920x1080 resolution over DVI, considering how old my card is.

The help is appreciated, thanks in advance!
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Old 03-11-07, 04:49 AM   #2
Thunderbird
 
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Default Re: Way to list a Geforce card's supported resolutions?

The standard VGA output ('D-SUB') supports about any resolution as its bandwidth of 300-400MHz for most cards is very high. The digial output (DVI) has a relatively low bandwidth of 135-160MHz for most 'old' cards (geforce2 - geforce6). Cards containing a dual link DVI output (in general geforce7 or higher cards) have a higher bandwidth of about 300MHz which is sufficient for most resolutions.

I think that a mode for 1920x1080p needs about 155MHz while the DVI output of your card provides I think 135MHz (at the time the devices were made for 1280x1024). Finding a better card is tricky as it depends a bit on the vendor and the gpu how high the maximum pixelclock for DVI is.
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Old 03-12-07, 09:45 PM   #3
orphaze
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Default Re: Way to list a Geforce card's supported resolutions?

Well, I just spoke to a friend who offered to semi-permanently lend me his old Geforce4 Ti 4xxx card so that will replace my MX for the time being. I suspect that it will be far more likely to support the necessary bandwidth/clock speed than my cheap MX card. I will post with my results.

Thanks for your response!
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Old 03-30-07, 10:25 PM   #4
orphaze
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Default Re: Way to list a Geforce card's supported resolutions?

Thunderbird, I think you were spot on. From my Geforce 4 MX bug report:

Quote:
(--) NVIDIA(1): Connected display device(s) on GeForce4 MX 4000 at PCI:1:0:0:
(--) NVIDIA(1): DELL M781s (CRT-0)
(--) NVIDIA(1): WDE WestinghouseLVM-37w3 (DFP-0)
(--) NVIDIA(1): DELL M781s (CRT-0): 350.0 MHz maximum pixel clock
(--) NVIDIA(1): WDE WestinghouseLVM-37w3 (DFP-0): 135.0 MHz maximum pixel
(--) NVIDIA(1): clock
(--) NVIDIA(1): WDE WestinghouseLVM-37w3 (DFP-0): Internal Single Link TMDS
(II) NVIDIA(1): Assigned Display Device: DFP-0
(WW) NVIDIA(1): No valid modes for "1920x1080_60"; removing.
(WW) NVIDIA(1):
(WW) NVIDIA(1): Unable to validate any modes; falling back to the default mode
(WW) NVIDIA(1): "nvidia-auto-select".
(WW) NVIDIA(1):
(II) NVIDIA(1): Validated modes:
(II) NVIDIA(1): "nvidia-auto-select"
(II) NVIDIA(1): Virtual screen size determined to be 1280 x 720
So, my Geforce 4 MX would only do 720p over DVI. Compare this to my friend's Geforce 4 Ti4600, which did 1080p just fine:

Quote:
(--) NVIDIA(1): Connected display device(s) on GeForce4 Ti 4600 at PCI:1:0:0:
(--) NVIDIA(1): DELL M781s (CRT-1)
(--) NVIDIA(1): WDE WestinghouseLVM-37w3 (DFP-0)
(--) NVIDIA(1): DELL M781s (CRT-1): 350.0 MHz maximum pixel clock
(--) NVIDIA(1): WDE WestinghouseLVM-37w3 (DFP-0): 165.0 MHz maximum pixel
(--) NVIDIA(1): clock
(--) NVIDIA(1): WDE WestinghouseLVM-37w3 (DFP-0): External Single Link TMDS
(II) NVIDIA(1): Assigned Display Device: DFP-0
(II) NVIDIA(1): Validated modes:
(II) NVIDIA(1): "1920x1080_60"
(II) NVIDIA(1): Virtual screen size determined to be 1920 x 1080
Unfortunately, the driver did not specify anything about the pixel clock being under the required amount, only that the mode was not valid. If you hadn't have informed me of what the problem was I would probably still be trying to get it to work!
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Old 03-30-07, 11:18 PM   #5
zander
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Default Re: Way to list a Geforce card's supported resolutions?

The NVIDIA X driver will provide more mode validation related information if you start X with -logverbose 5 or -logverbose 6.
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