Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!wuarchive!uunet!munnari.oz.au!ariel!ucsvc.ucs.unimelb.edu.au!luga!lure.latrobe.edu.au!ccmk From: ccmk@lure.latrobe.edu.au Newsgroups: comp.sys.dec Subject: Re: DECpc 433 Workstation Message-ID: <1991Jun8.113443.1@lure.latrobe.edu.au> Date: 8 Jun 91 01:34:43 GMT References: Sender: news@luga.latrobe.edu.au (USENET News System) Organization: VAX Cluster, Computer Centre, La Trobe University Lines: 35 In article , traymund@uiuc.edu (Tim Raymund) writes: > I've been looking at those giant adds in the trade journals for the > DECpc 433 Workstation, and I've got a few questions. > What's special about the 486DX? Is it different from a plain 486? > Is a coprocessor an option? What's the performance like? MFLOP? MIPS? > SPEC? The 486 is a full 32 bit microprocessor based on the 386 architecture (with some minor additions) but running about 2-3 times faster at the same clock speed. A floating point unit is included, but some PC manufacturers allow for a Weitek co-processor for slightly more performance. There are two flavours of 486 - 486 and 486SX, the SX model has the floating point co-processor disabled and currently runs at 20MHz (the minimum speed of the 486 is 25MHz). The DX name comes from the 386, which had a DX (full 32 bit bus) and SX model (16 bit bus). Note both 486 models are full 32 bit. The only performance figures I have are that the 486 is rated about 8-10 mips, and the 486SX is about 10% faster than a 33MHz 386. The figures don't say much! > Will it conform to ACE standards? Is it upgradable to a MIPS chip? The ACE standard includes specifications for Intel and MIPS microprocessors. I don't think they are supposed to be interchangeable. > What's the internal bus? EISA? Is it accessible? The expansion bus is EISA, with about 7 slots? That's all I know... Dr Mark Kosten, phone: +61 3 479-2767 Computer Centre, AARNet (internet): ccmk@lure.latrobe.edu.au La Trobe University, X.25 (PSI): 05052347300000::ccmk Bundoora, 3083 Australia