I'm sure you know about the issues with some NVIDIA mobile GPUs, as earlier in July NVIDIA admitted it was taking a $150 - $200 million charge to cover (emphasis mine):
... anticipated customer warranty, repair, return, replacement and other consequential costs and expenses arising from a weak die/packaging material set in certain versions of our previous generation MCP and GPU products used in notebook systems. All newly manufactured products and all products currently shipping in volume have a different and more robust material set.
Since they both HP and Dell have admitted the issue affects their notebooks, but Apple has not.
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