Ponzi wrote:
fishbert wrote:
The previous MacBook Pro has exactly the same NVIDIA chip, yet supported a properly-functioning SATA II interface just fine.
We don't know if the chipset is exactly the same even if it has the same part number. Apple buys in large enough quantities to dictate changes to NVIDIA. For example, Dell used to sell a system with a Creative sound card having the exact same name as the retail version of the card, but the card used in the Dell system wasn't exactly the same. I believe Dell began inserting a footnote in its product descriptions to state that the retail version was different. Maybe this current crop of MBPs has a slight variation of the NVIDIA chipset that could be causing the SATA problem.
Different versions of a card and different versions of a chip are two very different animals. And a sound card name or model number is also very different than an integrated circuit part number.
The chips themselves have the exact same markings (down to the dash number) between the mid-June refresh and the previous generation. The only significant variation with the chip (discounting a fab change - unlikely, especially one that would coincide with another company's product change) would be by lot, and the problem we are seeing is too widespread and too spread out over time to be a lot issue.
The logic board may be different... the SATA cable may be different... etc., but the NVIDIA part used is exactly the same. The problem does not appear to be NVIDIA's "fault".