we got on the phone with GeForce General Manager Ujesh Desai and GeForce Senior VP Jeff Fisher to ask some follow-up questions. What exactly causes Nvidia chips to fail in the first place? Can the same failures occur in desktops, and is that what we're seeing in the HP systems we talked about earlier this week? What of the GeForce 9400M "motherboard GPU" in Apple's new notebooks?
Predictably, we couldn't get a more concrete answer on the specifics of the failures. Desai was, however, willing to point out that the failures only affect a "small percentage" of notebooks, and the problems depend on a combination of factors, so "you can't just . . . point back to our chip."
Fisher was notably chattier on the topic of potential desktop failures:
There is no evidence that this issue exists in desktops as we know them. And in fact, Mr. McLellan has no evidence to even imply that. The fact is that lead bumps?he's saying that lead bumps will fail, and therefore you should expect to see failures on everything, and that's completely out of balance from an educated operations guy like he is. . . . I think most industry people would say lead bumps are not a cause of failure and are in fact very reliable. And his soda-can analogy and attempt to drag in desktops is irresponsible from our view and a huge reach.
About the failing HP systems, Desai specified, "It's not 38 different systems, it's actually a single design, and the model numbers that were reported . . . are actually model numbers that refer to different configurations of the same product." He went on to say Nvidia is "working closely with HP to determine if or how the Nvidia chips are even involved in the failures."