The inquirer has been carrying this story for a long time. My understanding is that the GPU and substrate bond (I assume they're using some sort of epoxy, or some sort of underflowed bonding material) was slightly off-spec. That means that it doesn't share the same coefficient of thermal expansion as the substrate, and the GPU.
Everyone knows that Heat-Cold-Heat stress shocking causes extreme wear on that bond, and it's apparently just a matter of time before the affected parts fail. It's a problem I work with every single day in the CCD fab I'm part of.a There was speculation for a while that Nvidia knew about this since the A1 and A2 revisions of the 8600 GPUs had different core voltages, which was rather curious.
Reader Comments (Page 1 of 1)
Roygbiv @ Jul 11th 2008 1:54AM
其實…我也沒有搞得很懂。下面是主站一位 nerdtalker 的回應，看起來應該能說明一些事情吧 XD
The inquirer has been carrying this story for a long time. My understanding is that the GPU and substrate bond (I assume they're using some sort of epoxy, or some sort of underflowed bonding material) was slightly off-spec. That means that it doesn't share the same coefficient of thermal expansion as the substrate, and the GPU.
Everyone knows that Heat-Cold-Heat stress shocking causes extreme wear on that bond, and it's apparently just a matter of time before the affected parts fail. It's a problem I work with every single day in the CCD fab I'm part of.a There was speculation for a while that Nvidia knew about this since the A1 and A2 revisions of the 8600 GPUs had different core voltages, which was rather curious.