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- Xref: sparky comp.sys.intel:2757 comp.sys.mac.hardware:24453 comp.sys.ibm.pc.hardware:33571
- Newsgroups: comp.sys.intel,comp.sys.mac.hardware,comp.sys.ibm.pc.hardware
- Path: sparky!uunet!brunix!cs.brown.edu!ma106071
- From: ma106071@cs.brown.edu (Jim Lowe)
- Subject: Re: 486 vs. Mac Benchmarks
- Message-ID: <1992Dec17.223358.12395@cs.brown.edu>
- Sender: news@cs.brown.edu
- Organization: Brown Computer Science Dept.
- References: <torrie.724148637@Xenon.Stanford.EDU> <1gdipoINN749@rave.larc.nasa.gov> <BzF5MF.2Lv@usenet.ucs.indiana.edu>
- Date: Thu, 17 Dec 1992 22:33:58 GMT
- Lines: 51
-
- In article <BzF5MF.2Lv@usenet.ucs.indiana.edu>, ntaib@silver.ucs.indiana.edu (Iskandar Taib) writes:
- |> In article <1gdipoINN749@rave.larc.nasa.gov> w.l.vaughn@LaRC.NASA.GOV (Wallace L. Vaughn) write
-
- |> >Mac II, 16mHz, system 7.01+, 8bit 640 x 480 video, 8 meg ram
- |> >Mac IIci, 25mHz, see above
- |> >386dx, 33mhz system, windows, 3.0, 640x480 svga screen, no cache. 8meg RAM
- |> > calc.(sec) scroll(min:sec)
- |> >Mac II 35.3 2:16.2
- |> >Mac IIci 15.3 1:31.2
- |> >Mac IIci/cache off 19.2 1:44.7
- |> >386dx 22.5 2:25.3
- |>
- |> Hmmmm.
- |>
- |> Most 386 motherboards above 25 MHz have a built-in SRAM cache
- |> these days. Even the bargain basement jobs.
-
-
- I'd say Motorola's 680x0 series is faster than Intel's 80x86 of the same
- generation, AT THE SAME CLOCK SPEED. The reason Intel's tend to be substantially
- faster in reality is that Intel always offers them at a higher clock speed than
- Motorola has yet achieved. e.g., the 33MHz 486 has been on the market for 2 years
- or so, while the 33MHz 68040, I believe, just came out within the last two
- months. (at least, the first Quadra based on it was released then).
-
- Running a fast chip without a cache cripples it with so many wait states that it
- loses its clock speed advantage entirely. The original XT didn't need a cache
- because it ran at 4.77 MHz and used 210 ns DRAMs. (at 4.77 million clocks/sec.,
- each clock lasts exactly 210 ns). Think about it; clock speeds have gone up 10
- times, while memory speeds have barely gone up 3 times. Trying to compare two
- fast chips, one of which has a cache, and one of which doesn't, is completely
- meaningless. Of COURSE the one with the cache will win by an enormous margin. As
- is pointed out above, for months or years now, virtually all 386 systems have
- been offered with cache.
-
-
- --
- *********************************************************************
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- | | | | |
- -- --- - - -----
- GRANDIOSE
- and
- ANNOYING
- .signature file.
- jim lowe, cs141046@cs.brown.edu
- ma106071@cs.brown.edu
- **********************************************************************
-
-