RE: 890 cpw per cpu

[Scott Mildenberger <Smildenber@xxxxxxxxxxxx>]

Steve,

In Frank Soltis' book Fortress Rochester it explains this.  I can't remember
all the technical details but basically two different processors can do the
same amount of work but have widely differing processor speeds depending on
their architecture, I think it relates to how deep the pipelines are.  With
the Power4 processor IBM has changed the architecture and now the processor
speed appears more in line with processors from Intel.  The older
processor's architecture made them appear to be much slower than an Intel
processor but they were doing much more work per MHz.  I would have to refer
to that section in the book to get a better description of how this works.

Scott Mildenberger

> -----Original Message-----
> From: Steve Richter [mailto:srichter@autocoder.com]
> Sent: Monday, April 29, 2002 12:47 PM
> To: chat. Midrange-l
> Subject: 890 cpw per cpu
>
>
> This is a multi-part message in MIME format.
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>
> The cpw of the new 890 looks to be about 1170 per cpu.  (
> 37,400 / 32 ).
> The cpw per processor of the other iSeries models is about
> 1070  ( cpw of
> the 270/2432 ).  The 890 runs on a 1.3 GHz Power4 processor.
> The processor
> of the 270 runs at less than half that speed ?
>
> Why is the cpw per cpu of the new 890 not higher ?
>
> Does the power4 processor of the 890 actually run at 1.3 GHz?
>
> Steve Richter
>
>