on 1/2/03 3:32 PM, GTO at [EMAIL PROTECTED] wrote:
>> I'm thinking about buying a Radeon 7000 for Mac PCI video card and have a
>> couple of concerns about compatibility with the system I have. I have a
>> Powerbase 240 with a Powerlogix Powerforce G3-400 upgrade and maxed out to
>> 160 megs of ram. My concerns regard the statement in the system
>> requirements of a "PCI (66MHZ or 33 MHZ) - capable Macintosh." Is the
>> Powerbase considered to be a "66mhz or 33mhz - capable Macintosh?"
>> Also, I think I saw a mention of a PCI 2.0 requirement. I've tried (and
>> I know others have also) to determine what this "PCI 2.0" requirement is and
>> if the Powerbase is such. Any help would be greatly appreciated.
>>
>> Thanks
>> Jerry
>
> Some references:
> http://www.lowendmac.com/tech/pci.shtml
> http://www.serverworks.com/technology/pdf/PCI-X_2-0_WhitePaper.pdf
>
>
> Speed Mismatch Compatibility
> All speed generations of PCI are
> interoperable. For example, a 33MHz
> adapter card can plug into a 66MHz slot,
> a PCI-X 133 slot, or even a PCI-X 533
> slot. If the card can't meet the
> performance of the slot, the slot
> frequency is throttled down to meet the
> maximum frequency of the card. In this
> example, since the card is capable of
> operating at 33MHz, the slot will change
> its frequency to 33MHz to match the
> speed of the card. The converse is also
> true; a higher performance card will also
> adjust its frequency to match the
> maximum performance of a slower slot,
> maintaining complete forward and
> backward compatibility.
>
>
> GTO
> --
Thanks for the helpful explanation and links.
Jerry
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