on 9-29-04 5:04 AM, Neil Hughes at [EMAIL PROTECTED] wrote:
>> Does anyone know what the cutoff point is as far as G3 CPU upgrades
>> affecting FBS?
>>
>> I know the 800MHz upgrades drop it down from 100MHz to 66.66 and that the
>> 500MHz upgrades still allow FBS of 100MHz. Maybe 700MHz is the cutoff point
>> for 100MHz bus speeds? [shrugs]
>
> I thought this drop from 100MHz bus speed to 66MHz only affected G4
> upgrades in B&Ws?
Sorry, I prolly didn't phrase the question right. �_�
What I meant was: the cutoff point for a reduction in FBS when upgrading the
CPU in a B&W G3 to either another G3 or a G4 using, say, a Powerlogix or
Sonnet (or whatever) ZIF upgrade.
>From what (little) I can tell so far, there may not be any absolutes here.
According to XLR8yourmac:
>OWC MercuryZ600+ G4/500-600MHz Altivec Enhanced ZIF
>* 100MHz bus speed
So the 66.66/100MHz bus speed thing may simply vary from manufacturer to
manufacturer. [shrugs] I wonder if it's a matter of some makers don't want
to risk instability, or if it's just a matter of their engineering
departments not being able to figure out how to make their upgrades retain
the 100MHz bus speeds.
What prompted this query is that some of the reviews posted at XLR8 make it
sound like the "noticeable" difference between, say, a 500MHz upgrade
running at a 100MHz bus speed and an 800-900 MHz upgrade running at a 66.66
bus speed may not be all that great.
<whine>
Why can't this world operate solely in absolutes? What's an anal-retentive
to do?
</whine>
Best,
James Fraser
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