Can S3 X server support 1280x1024 at higher than 85Hz refresh rate.

Can S3 X server support 1280x1024 at higher than 85Hz refresh rate.

Post by Kelly Murr » Sat, 11 Dec 1993 04:58:03



|>  
|> I recently heard that the XFree86 S3 X server can support 1280x1024 but
|> the maximum clock supported is 85hz. Is this true? I was hoping to get
|> a good refresh rate around 110Hz.
|>

It depends on which S3 board is used.
S3 boards that use the BT485 RAMDAC are currently limited to a 85Mhz clock,
since this RAMDAC requires special programming at high clocks.
This includes most of the high-end S3 cards, like the #9's.

when the XFree folks get the support for it.

S3 boards that use the AT&T RAMDAC can use a 110Mhz clock with the
current XFree2.0 S3 server (but no higher).
The ISA Actix Ultra+ board which I use and sell
has the AT&T RAMDAC, and I recommend it as the best S3 card for XFree2.0.

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Can S3 X server support 1280x1024 at higher than 85Hz refresh rate.

Post by Steven Buytae » Tue, 14 Dec 1993 19:16:49


: I recently heard that the XFree86 S3 X server can support 1280x1024 but
: the maximum clock supported is 85hz. Is this true? I was hoping to get
: a good refresh rate around 110Hz.

 Hi,

 I can not give you a direct yes or no. The only thing I can advice
 is to *LEARN and STUDY* (!= to read) the VideoModes.doc file,
 that came with your Xfree distribution.

 If your card, whatever card, can clock the pixels at
 a sufficient high rate *and* you have sufficient video ram, the
 number of lines HR or VR or refresh rate are in your own hands.
 *LEARN* what is in that doc file; it is not that difficult. I did
 it and I don't have a masters degree in whatever...
 I could NOT get my monitor displaying a better picture due to the fixed
 horizontal scan frequencies, *BUT* I learned a lot and boy, did
 that felt good... BTW, when I'll buy a monitor now, I can realy
 swap the salesguy of his feet 8^) AND buy a monitor that'll do what
 *I* want...

--
Steven Buytaert
Interuniversity Micro Electronics Centre - Invomec Division
Kapeldreef 75, 3001 Heverlee, BELGIUM

phone   : +32 16 281 271
fax     : +32 16 281 584

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1. Can S3 X server support 1280x1024 at higher than 85Hz refresh rate.

This is my first post to this newgroup so I hope this is appropriate for
the group.

I recently heard that the XFree86 S3 X server can support 1280x1024 but
the maximum clock supported is 85hz. Is this true? I was hoping to get
a good refresh rate around 110Hz.

Thanks.

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      /    Phone : (408)746-7870  |  P.O. Box 3470 M/S 233        \
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