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- From: nan@matt.ksu.ksu.edu (Nan Zou)
- Newsgroups: comp.unix.bsd,comp.sys.ibm.pc.hardware
- Subject: Re: ATI Mach32 and Xfree86 or XS3?
- Date: 28 Jan 1993 20:49:49 -0600
- Organization: Kansas State University
- Lines: 43
- Message-ID: <1ka60dINNhp3@matt.ksu.ksu.edu>
- References: <1993Jan26.162704.13442@usasoc.soc.mil> <1993Jan26.220906.26671@netcom.com> <1993Jan27.052056.23103@informix.com>
- NNTP-Posting-Host: matt.ksu.ksu.edu
-
- johng@informix.com (John Galloway) writes:
- >hasty@netcom.com (Amancio Hasty Jr) writes:
-
- >>The ATI Mach32 is based upon ATI's mach32 chipset.
- >>for speed I suggest acquiring a 928 based card which is faster than the
- >>ATI MACH32 by as much as 34% overall graphics performace, even on the ISA :-)
-
- >Any info on cards that are using the 928 that are available?
-
- I have a fax here from Diamond that gives some info on their Stealth Pro
- card which is based on the S3 86C928. It can take a maximum of 2 MB of
- VRAM, resolutions of 640x480x24, 800x600x24, 1024x768x16, and 1280x1024
- x8, all with 72 HZ non-interlaced refresh. They quote 35 Million
- Winmarks on a 66 Mhz DX2, of course this is still quite far behind their
- 50 Million Winmark Viper card which is based on the Weitek P9000 chip,
- but since the Weitek chip just appear I wouldn't expect a X server
- being written for it any time soon, so for now, the 928 seems like the
- best choice. According to Amancio Hasty, the 928 should be able to do
- 120K Xstones, versus the ATI Ultra Pro's 100K, this pretty much agrees
- with the Winmark ratio, 35M versus 28.5M for the ATI, now if there does
- exist a positive correlation between Xstone ratios and Winmark ratios,
- we can probably expect 170K Xstones from a Weitek P9000 based-card. WOW!
-
- Of course, I will never recommend anyone to buy a Diamond product,
- because of their use of variable clock synthesizer and refusal to
- disclose programming info without much money. Some Linux folks have
- been complaining about unneeded hassles with Diamond video cards, so I'd
- say stay away from them.
-
- Now if you also want to run OS/2 then the ATI seems pretty attractive,
- since it's register-compatible with IBM's 8514/A, you can expect at
- least some support in OS/2, I don't think there's much support for the
- S3 chips in OS/2 PM (other than standard VGA).
-
- >>Going to a local bus card will not buy you significant performance
- >>improvement, at least with the S3 chipsets.
-
- If I understand correctly, with smart graphics coprocessors like the S3
- and ATI chips, the higher bandwidth of local bus won't help you much
- unless you're doing offscreen to video memory copies, in which case the
- local bus will gain significant advantage over an ISA bus.
-
- -- Nan
-