You have received several good relies to your query... Let me add, don't
upgrade to 9.1 unless you have 256 Mb ram and better yet at lest a 400MB
G3 card. 9.1 is wonderful but will slow the original configuration to
what seems 33% slower. I've been there. Use  7.6 or 8.5 ... or "Load it
to the MAX with RAM".
RHB 
**************************
Steve Luke wrote:
> 
> Hi,
>     I've just purchased a PowerTowerPro 250 running OS 7.6.1. I'm not
> sure if its got the original processor in healthy condition because
> the OS system diagnostic reports it running at about 120 mhz, and I
> thought it should be higher. I have tried upgrading the OS to 8.5
> using a standard Mac CD, but ran into harddrive driver error messages
> and backed of. I'm worried about the availability of specialised
> software if this machine needs any and I delete whats already there.
> 
> Does anyone have any advice on such an OS upgrade?
> 
> And, regarding the clock speed, are there any recommendations for
> cost effective processor upgrades? I understand a daughterboard
> system is standard on these machines?
> 
> Regards
> ~steve~
>

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