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Intel is seen among the Macintosh community as being a purveyor of hot-running chips. Apple themselves mocked the Pentium range in their "Burning Bunnies" advertisements of the late 1990s, and the [[Pentium 4]] needs large amounts of power and cooling to operate, making it unsuitable for laptops and small PCs. However, the [[Pentium M]] chips, which were designed for laptop use, run much cooler than the Pentium 4, and Apple is expected to use these CPUs first.
Finally, the relative "goodness" of the x86 architecture has been discussed. Critics of the switch say that x86 was a poor choice because of its lack of hardware [[register]]s compared to the PowerPC, the awkwardness of the x86 [[instruction set]], and the lack of [[AltiVec]]. Proponents have responded by saying that the x86 architecture has evolved greatly since the original 8086 was introduced, and that CPUs in general have combined [[RISC]] and [[CISC]] philosophies in their internal designs for some time, making the distinction obsolete; they also point out that improvements to [[Streaming SIMD Extensions|SSE]] that can completely replace [[AltiVec]] are coming, and that most programmers rarely deal with x86's peculiarities now because the [[compiler]] does the work. Also, 64-bit capability was not mentioned in Apple's initial developer notes, which has worried some observers; it has since been indicated that the Pentium 4 in the developer machines has [[EM64T]] capability, and that all of the Intel chips due out by the time the Power Mac line switches over will be 64-bit. Apple has not yet released any plans for 64-bit Intel machines, though the capability will be there.
===Existing applications===
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