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- From: rvenkate@ux4.cso.uiuc.edu (Ravikuma Venkateswar)
- Subject: Re: 486 vs. Mac Benchmarks
- References: <torrie.724148637@Xenon.Stanford.EDU> <1gdipoINN749@rave.larc.nasa.gov> <BzF5MF.2Lv@usenet.ucs.indiana.edu> <1992Dec17.223358.12395@cs.brown.edu>
- Message-ID: <BzFoLA.LB1@news.cso.uiuc.edu>
- Sender: usenet@news.cso.uiuc.edu (Net Noise owner)
- Organization: University of Illinois at Urbana
- Date: Fri, 18 Dec 1992 02:36:45 GMT
- Lines: 69
-
- ma106071@cs.brown.edu (Jim Lowe) writes:
-
- >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).
-
- But wasn't the 68040-33 clock doubled? (i.e. didn't it run internally
- at 66 MHz) Which would mean that the 68040-33 should be compared to the
- 80486DX2-66 . Which means that the Intel processor is still faster at the
- same clock speed.
-
- >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.
-
- And virtually all 386 systems are offered with accelerated video. Of course,
- you could compare _one_ 386 system with a cached system - the system
- with 33ns SRAM (and if I remember correctly, 4MB - anyone put a finger
- on the thing? If I remember correctly, it appeared in a PC Magazine review)
- :-)
-
-
- >--
- >*********************************************************************
- > ----- ----- -- -- | -----
- > | | | \ / | | |
- > | | | - | -----
- > | | | | |
- > -- --- - - -----
- > GRANDIOSE
- > and
- > ANNOYING
- > .signature file.
- > jim lowe, cs141046@cs.brown.edu
- > ma106071@cs.brown.edu
- >**********************************************************************
- >
- --
- Ravikumar Venkateswar
- rvenkate@uiuc.edu
-
- A pun is a no' blessed form of whit.
-