Re: 890 cpw per cpu

[Vernon Hamberg <vhamberg@xxxxxxxxx>]

If I recall, there're more levels of internal cache, changes in the cache
sizes, and other stuff that takes more time. So it's not a proportional
growth. The design is completely different internally from the previous
series. Details more than this I do not know.

At 02:47 PM 4/29/02 -0400, you wrote:
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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
>
>
> >i890 REGATTA SERVER
> >The 32-way i890 nearly doubles the processing power of the i840 to
> >37,400 CPW (see Figure 1 in the online version of this article). The
> >1.3 GHz Power4 chips cram 174 million transistors onto two
> >processors and enable the i890 to crank out transactions so fast
> >that it consumes energy at a breakneck pace, requiring 3-phase power
> >and dissipating up to 25,000 kBTUs of heat per hour.
>
> >The i890 triples the I/O capacity of last year's i840, supporting up
> >to 72 TB of disk, 2,047 disk arms, and 256 GB memory. The machine
> >also connects up to 32 Integrated xSeries Adapters (IXAs) and offers
> >up to 534 MB of L2/L3 cache.
>
>
>--
>
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