New IBM Graphics Workstations
David Hinds
dhinds at portia.Stanford.EDU
Mon Jul 30 02:50:33 AEST 1990
In article <9007261139.AA05802 at aero4.larc.nasa.gov> blbates at AERO4.LARC.NASA.GOV ("Brent L. Bates AAD/TAB MS361 x42854") writes:
>
> The last I heard was that the IBM's were comparable to the bottom
>of the SGI line, 4D/20 with minimal graphics.
>--
The IBM RS6000's have several levels of graphics support. The 8-bit
color 3D graphics level is quoted as doing 90K 3D vectors/sec, and 10K 3D
polygons/sec. The 24-bit color 3D graphics system is quoted as doing
990K 3D vectors/sec and 120K 3D polygons/sec.
For comparison, SGI says a base IRIS 4D/50 with 8 bit planes does
140K vectors/sec and 5.5K polygons/sec. An IRIS with GTX graphics is
supposed to do 475K vectors/sec and 100K polygons/sec.
It is not obvious how to compare the figures, however. The IBM
report quotes the lengths of vectors and sizes of polygons used. I looked
through all our SGI stuff and couldn't find the corresponding information.
These were the same SGI tables that quote 100 MIPS and 50 MFLOPS for a
4D/240, which are the theoretical limits, rather than performance on any
standard benchmark.
-David Hinds
dhinds at popserver.stanford.edu
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