Author: Aaron Gordon
Date: 09:33:18 11/01/01
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On October 31, 2001 at 17:16:13, Mike S. wrote: >On October 31, 2001 at 16:24:05, Roy Eassa wrote: > >>Total 73.5 – 86.5 98.0 – 62.0 > >Meanwhile, Bertil pointed out that this could have to do with the MMX support of >the CPU. > >Do some of the experts here know, if the K6 has MMX support (and if, is it >slower than that of the Intel CPUs)? This could be the reason, or one of them, >for these big differences in the match results. > >Did other chess progammers utilize MMX code for their engines yet? I assume it >has to do with that SIMD instructions (?). > >Regards, >M.Scheidl Yes, the AMD K6, K6-2, K6-3 and K6-2/3+ have MMX. It should be just as fast as a P55C's MMX unit. The K6/350 used in those tests is most likely a K6-2 unless they overclocked it. If my memory serves me the non-3dnow K6 comes in speeds from 166 to 300MHz. the 266 & 300MHz is 0.25 micron where the 166-233's are 0.35. All have MMX. The K6-2/300 on up to 550Mhz has MMX and 3DNow. K6's at 380MHz or more also have CXT which I think fix's some memory bandwidth problems.
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