[9fans] nvidia 1600x1200 dvi suggestions

[9fans] nvidia 1600x1200 dvi suggestions

[Russ Cox]

It turns out that my vgadb entry was fine and that the
card I'm using (an ASUS V9400-X/TD/64, but perhaps
more generally all Geforce MX4000s) doesn't do DVI
output above 1280x1024.  It can do analog output up
to 2048x1536, but no DVI.  So I can drive my 1600x1200
flat panel in analog mode (which looks surprisingly good)
but not in digital.

Anyone out there using a DVI card that drives 1600x1200?
I have one GeForce4 MX 440 that seems to do the trick, but
I'm worried that the packaging matters as well as the chipset
and the card is old enough that it's hard to find these days.

Russ

Re: [9fans] nvidia 1600x1200 dvi suggestions

[Jack Johnson]

On 5/4/05, Russ Cox <russcox@gmail.com> wrote:
> It turns out that my vgadb entry was fine and that the
> card I'm using (an ASUS V9400-X/TD/64, but perhaps
> more generally all Geforce MX4000s) doesn't do DVI
> output above 1280x1024.  It can do analog output up
> to 2048x1536, but no DVI.  So I can drive my 1600x1200
> flat panel in analog mode (which looks surprisingly good)
> but not in digital.

http://www.xlr8yourmac.com/Graphics/Samsung_240T_info.html

"The TMDS signalling in the DVI interface has a maximum bandwidth of
165 Mhz, or 165 Mpixels/s. At 60 Hz this equals to a maximum
resolution of 1920 x 1080 for the display over single TMDS link.
Obviously not enough for a 1920 x 1200 display.

However the standard DVI interface has enough pins for two TMDS links
and there are both displays and cards with a single or dual TMDS
implemented (12 or 24 pins). A dual link DVI interface has double the
bandwidth and therefore a maximum resolution of 2048 x 1536."

Maybe?

More interesting info in the article.

-Jack

Re: [9fans] nvidia 1600x1200 dvi suggestions

[Artem Letko]

> "The TMDS signalling in the DVI interface has a maximum bandwidth of
> 165 Mhz, or 165 Mpixels/s. At 60 Hz this equals to a maximum
> resolution of 1920 x 1080 for the display over single TMDS link.
> Obviously not enough for a 1920 x 1200 display.
> 
> However the standard DVI interface has enough pins for two TMDS links
> and there are both displays and cards with a single or dual TMDS
> implemented (12 or 24 pins). A dual link DVI interface has double the
> bandwidth and therefore a maximum resolution of 2048 x 1536."
> 
> Maybe?
> 

no. 1600x1200@60Hz is perfectly fine for a single link DVI with normal
blanking interval. Reduced blanking will give you 1920x1200 over
single link. Depending on a TMDS transmitter, the real bandwidth you
get is about 162Mhz. Russ is on the right track - the card is crap.

> More interesting info in the article.
> 
> -Jack
> 

-art

Re: [9fans] nvidia 1600x1200 dvi suggestions

[boyd, rounin]

yeah i got a 1280x800x32 LCD.  unfortunately it's a:

    ATI MOBILITY RADEON 9200 (32Mb)

nice display.  really bright.

as anyone intergrated philippe anel's ATI* vga stuff?
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