Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!wuarchive!cs.utexas.edu!yale!mintaka!bloom-beacon!world!boris From: boris@world.std.com (Boris Levitin) Newsgroups: comp.sys.mac.misc Subject: Re: Mac speed Keywords: MHz, SE/30, IIci Message-ID: <1990Aug28.032555.26185@world.std.com> Date: 28 Aug 90 03:25:55 GMT References: <1990Aug28.002743.1564@caen.engin.umich.edu> Distribution: usa Organization: The World @ Software Tool & Die Lines: 34 cerberus@caen.engin.umich.edu (R Eric Bennett) writes: >Why is the SE/30 clocked 34% slower than the IIci (or why is the IIci 50% >faster than the SE/30)? They both have the same 68030 No, they don't. The SE/30 has a 68030 running at 16MHZ (the same chip that powers the IIcx); the IIci has a faster, 25MHz 68030. >Also, can a Mac Plus be sped up? There is a large number of accelerators available offering 68000, 68020 and 68030 CPUs at a variety of speeds, with or without FPUs. The fastest is a Gemini II 50MHz 68030-based board with a 68882 FPU, available for $2,800, which speeds the Plus up 1,160% (yes, one thousand one hundred sixty percent, or faster than the IIfx). To accelerate a computer, it's not enough to change just the speed of the CPU and FPU; you must also speed up (or replace with faster versions) many the chips with which they interact. That's why you need an accelerator board and not just a faster CPU. >On an aside, why did they put color quickdraw in a computer with a monochrome >monitor attached? To enable people to attach a color video board (such as the RasterOps 264 and 364) to the SE/30's Processor Direct Slot, and power a color monitor. The SE/30 is a relatively fast machine intended for people who may well need/want/ be able to afford color video. Boris Levitin ---------------------------------------------------------------------------- WGBH Public Broadcasting, Boston boris@world.std.com Audience & Marketing Research wgbx!boris_levitin@athena.mit.edu ---------------------------------------------------------------------------- (The opinions expressed herein are my own and do not necessarily coincide with those of my employer or anyone else. The WGBH tag is for ID only.)