However, when you bump up to a Sawtooth G4/400, the memory is much faster than a B&W G4/400, even though both have a 100 MHz bus speed. When Apple introduced the 133 MHz bus G4s, the memory scores increased linearly with that bus speed, seeming to now to be following a new line.
This leads me to suspect that a very significant improvement was made to the Sawtooth's memory controller (which was lauded at the time and caused hand wringing on the Yikes! models based on the older B&W MBoard), and the improvements made after then was the increase in bus speed, not architectural (efficiency) improvements. That is until they introduced DDR, which did not result in a 2x increase in memory speed, but that's another discussion.
Very interesting. I was of the understanding that the Blue and White G3 was in fact a member of the unified motherboard architecture or "uni" as it was talked about in the tech rumor circles at the time. Now my followup question is:
Are the XBench results based on faster memory controllers which were constantly improved with each revision? Or - are the results due to fundamental changes between the logic board series?
The first would indicate that XBench is not hinting at the BWG3 using a logic board other than one based on uni. The second would indicate that the BWG3 may not have been based on uni.
Any thoughts or further info to share? Its very interesting.
David
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