Re: ONYX2 and graphics performance.

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Rémi Arnaud (remi++at++remi.asd.sgi.com)
Fri, 24 Jan 1997 16:30:59 -0800 (PST)

Ken Sakai wrote:
>
>
> Fellow Performers,
>
> We are in the process of upgrading our "old" ONYX RE2 to InfiniteReality
> graphics. One option is to retrofit the IR graphics subsytem with 2-RM6-64
> with R10000's replacing our R4400's, The other, significantly more
> expensive option is to get a totally new ONYX2 IR system and surplus our
> "old" ONYX to another project. The question that I have is just how much
> of a performance increase graphics-wise will the ONYX2 system have over the
> upgraded ONYX system? Will the lack of ONYX2 XBOW for instance greatly
> limit my texture loading rates for instance? Just how much does the ONYX2
> architecture do for graphics? I would be grateful for any inputs.
>

 Onyx2 will provide you 2x the speed for downloading textures and display
 lists to the gfx. ClipMapping for example works a lot better on Onyx2.

 Independantly, some applicaton have a 10% increase of Pixel Fill.

 Evrything else is the almost the same for graphic, but dont forget that
 the bandwith between Cpu and Main memory is greatly improved on Onyx2,
 so that may help also for the other part of your applications.

 Also, I thought that Onyx2 IR was less expensibe that Onyx IR ?

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