9800 Pro, DVI, and 16:10 \ VOGONS

9800 Pro, DVI, and 16:10

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First post, by Standard Def Steve

Posted on 2013-08-11, 17:09

Standard Def Steve Offline

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I'm trying to connect my 9800 Pro to a 1920x1200 LCD using DVI, but it outputs garbage at that resolution (or any other 16:10 option). Anyone know of a fix for this? I've tried different drivers and have tried to "reduce DVI frequency for high-res displays," all to no avail. The analog output will do 1920x1200, but the picture is muddy.

It's a little frustrating because my Radeon 7000 PCI can drive this monitor at its native resolution over DVI.

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Reply 1 of 5, by swaaye

Posted on 2013-08-11, 20:12

swaaye Offline

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Those cards didn't have the best compatibility with DVI. But I haven't had problems with my 1920x1200 LCD. I'm not sure what to suggest...

A google search for "radeon 9800 dvi problem" gives lots of results.

Reply 2 of 5, by Standard Def Steve

Posted on 2013-08-13, 05:46

Standard Def Steve Offline

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I wasn't able to find a fix (at least for my card) in any of the Google results I looked at.
1280x720, 1280x768, and 1920x1080 are the only widescreen resolutions that work.

It seems that my x800XT All-in-wonder is also very picky about which resolutions it will support over DVI.

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Reply 3 of 5, by swaaye

Posted on 2013-08-13, 18:40

swaaye Offline

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Sounds like the monitor could be part of the problem. Or perhaps the DVI cable.

I don't have trouble with 9800 or X800 with my Dell 2405fpw.

Reply 4 of 5, by Davros

Posted on 2013-08-13, 19:18

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Do you have options for
Reducing DVI frequency on high-resolution displays — Resolves display corruption or the complete absence of images when for displays running at a high resolution. Enable this option only if your display is experiencing these types of problems.
Alternate DVI operational mode — When enabled, may eliminate display corruption.

do you have the proper inf installed for your monitor ?

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Reply 5 of 5, by Standard Def Steve

Posted on 2013-08-14, 01:45

Standard Def Steve Offline

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Not the monitor or cable. None of my other DVI monitors will work with these cards at any 16:10 resolution. Not sure why most 16:9 resolutions work fine. 😕

I've already tried the DVI frequency reduction; it doesn't change anything.

I guess I'll just have to live with the letterboxing at 1080. Or go analog.

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