Speaking of the Xbox 360, Chartered Semiconductor of Singapore say they're manufacturing a new Xbox 360 CPU that uses 65nm technology instead of the current 90nm. Early adopters shouldn't fret, since the new CPU is only for cost-cutting and lowering the overheating problems that earlier models have run into. It's common practice for console makers to switch out cheaper or better parts into later revisions to lower prices.
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Why does this matter to you? Well, if you can wait until the new processors are out, you'd probably have a lesser chance of an overheating 360.
Microsoft to upgrade Xbox 360 CPU [vnunet via i4u]