[rc5] Chip speeds

Marc Sissom msissom at dnaent.com
Wed Aug 20 16:12:50 EDT 1997


At 02:47 PM 8/20/97 -0400, you wrote:
>Just a quick question regarding chip speeds.  I've been looking on the
>benchmarks page and I noticed that the K5 and 6x86 chips seems to get 
>phenomenally good scores compared to the "bigger" chips like the K6 and
>Pentium 200, 166, etc.
>
>Can someone tell me if this is true, or just an artifact of the bench-
>marking process?

It's true. Those chips were optimized for integer performance
and that is what rc5 is all about. No floating point, no i/o or
memory bandwidth, just integer mips. Which of course, is what
95% of the rest of the software world is about also...

>Note the price to speed ratio's here (Canadian $):
>
>CPU             MHz     Cost    2.004 speed     Ratio (kkeys/$)
>K5              133     $102    320,000         3.14
>K5              166     $133    370,000         2.78
>6x86 P166+      133     $82     279,000         3.40
>6x86 P200+      150     $97     304,000         3.13
>Pentium         133     $142    165,000         1.16  <-sucks!
>Pentium         200     $305    265,000         1.15  <-sucks!	
>Pentium MMX     233     $530    305,000         0.58  <-really sucks!
>K6              233     $438    360,000         0.82  <-really sucks!
>
>Could anyone out there with a K5 or a 6x86 system get back to me on this?

At home the 6x86 pr166+ churns 270+Kk/sec under linux.

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