Originally posted by IntlHarvester
Well, I can remember when Apple Marketing decided to retroactively double the 040 Megahertz rating for no good technical reason. But I don't think Apple ever shipped a 66Mhz 040. Only 33Mhz and 40Mhz (Q840AV).
This entire post is qualified with an "IIRC"...
There was a 66MHz '040, as well as one that ran at 80MHz. See the thing is, back then PCs and Macs were rated by the speed of their FSB. So a Quadra 840AV had a 40MHz FSB, but internally the CPU ran at 80MHz. When Intel switched the way they marketed their chips (I believe the 486DX2 was the first to use the new naming system), Apple switched the way they marketed their computers.
This all happened a long time ago, and I wouldn't be surprised in the least if I'm wrong.