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- Newsgroups: comp.sys.intel
- Path: sparky!uunet!van-bc!bhenning
- From: bhenning@wimsey.bc.ca (Bill Henning)
- Subject: Re: 486SL dropped, vendors test Cyrix
- Organization: Wimsey Information Services
- Date: Sun, 10 Jan 1993 21:27:51 GMT
- Message-ID: <C0nqAF.B42@wimsey.bc.ca>
- References: <C0E0zB.DwG@inews.Intel.COM> <1993Jan6.135936.23923@crd.ge.com> <C0HsJp.ALy@inews.Intel.COM>
- Lines: 52
-
- In article <C0HsJp.ALy@inews.Intel.COM> rskinner@mipos2.intel.com (Rod Skinner) writes:
- >
- >Machine Processor/MHz SYSmark92
- >Compaq LTE Lite/25c Intel386 sl-25MHz 51.90
- >NEC PowerMate 3x25a Intel386 sx-25MHz 51.60
- >PC Brand LeaderBook 486LC/25 Cyrix 486slc-25MHz 48.69
- >TI TravelMate WinSLC Cyrix 486slc-25MHz 47.23
- >Aspen Personal 486 Cyrix 486slc-25MHz 43.65
- >Keydata Keynote 486slc-25 Cyrix 486slc-25MHz 43.55
- >Compaq Prolinea 3/25 2s Intel386 sx-25MHz 41.35 **
- >Micro Express NB486slc/25 Cyrix 486slc-25MHz 41.15
- >Grid 1755/486slc Cyrix 486slc-25MHz 37.31
- >
- >** no cache (on or off chip)
-
- A SYSmark92 of 48.69 for the PC Brand LeaderBook 486LC/25 (the fastest
- 486SLC figure you posted) vs. the SYSmark92 of 51.90 for the Compaq
- LTE Lite/25c (486SL) makes for a difference of about 7%.
-
- This is somewhat misleading, as this is not a purely CPU benchmark.
-
- >It just means that you need to be careful when buying a machine that has
- >the numbers "486" on the name plate. The system may have 486 in the
- >name and may execute "all the 486 instructions" but the thing that is
- >missing is 486 performance. That may change for the Cyrix 486DLC but I
- >don't have any application performance results that would allow me to
- >may any conclusions other than to expect Cyrix 486DLC performance
- >similar to the Intel386 DX at equivalent frequencies.
-
- Rod, I can't let that pass without a comment. Intel builds some truly
- excellent CPU's, and I am looking forward to the Pentium (R) but please
- do not equate a Cyrix 486DLC with an Intel 386DX at the same clock speed.
- Even a 486SLC beats a 386DX at the same clock speed according to some
- benchmarks I've seen.
-
- I believe that a 486DX, or SX, or SL is faster then the 486DLC at the
- same clock speed - makes a lot of sense, 8k cache vs. 1k cache ought
- to mean 80%+ hit ratio vs. 60%+ hit ratio, but I refuse to believe
- that a 486DLC even with the only 1k cache will not beat a 386DX at
- the same clock frequency, probably by a factor of 2.
-
- >rod
- >
- >Rod Skinner I speak for myself only.
- >Intel Corp
- >2200 Mission College Blvd RN4-21 PH (408) 765-4474
- >Santa Clara, CA 95052 FAX (408) 765-4920
-
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