The 9x9/KSx00 and x20 has the same clock speed. The x20 just had a bigger cache, IIRC 512 kB for data and 512 kB for instructions.
Christian Lheureux
> -----Message d'origine-----
> De : HP-3000 Systems Discussion [mailto:[log in to unmask]] De la part
> de David N Lukenbill
> Envoyé : mercredi 8 septembre 2004 16:03
> À : [log in to unmask]
> Objet : Re: [HP3000-L] 979 vs. 989
>
> Craig,
>
> The 979/x00 series had 180 MHz CPUs. The 989/x00 series had 200 Mhz, and
> the 989/x50 series had 240 MHz. I don't remember the x20 series speed.
>
> I don't have the info handy, but I think the main limiting factor on
> backplane I/O is the HP-PB, which is 32 Mbytes/sec (peak). I'm pretty
> sure
> it's the same for all systems in the 9x9 series. I doubt you'd see much
> of
> an I/O improvement between the 979 and 989 systems.
>
> David
>
>
>
>
>
>
> Craig Lalley <mr_lalley
> @yahoo.com>
> Sent by: HP-3000 Systems Discussion <HP3000-L
>
>
> 2004/09/07 09:12 PM
> Please respond to Craig Lalley
>
> Sorry for the on-topic discussion....
>
> I know someone on the list has this information in their brain.
>
> I know that the 979 has 180Mhz CPU's and the 989KS has 240 Mhz CPU's.
>
> But my question, is the backplane any faster on the 989, if so, how much
> faster, and would there be any improvement in I/O?
>
> TIA,
>
> -Craig
>
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