ZALMAN AMD Athlon/ Duron/Athlon XP Socket 462 CPU Manual de usuario descargar pdf (Pagina 11)

Multicore CPUs

CPU clock speeds hit a practical limit of roughly 4 GHz around the years

2002–2003, motivating the CPU makers to find new ways to get more process-

ing power for CPUs. Although Intel and AMD had different opinions about

64-bit CPUs, both decided at virtually the same time to combine two CPUs into

a single chip, creating a dual-core architecture (Figure 5.7). Dual core isn’t just

two CPUs on the same chip.A dual-core CPU has two execution units⎯two sets

of pipelines⎯but the two sets of pipelines share caches (how they share caches

differs between Intel and AMD) and RAM. Both AMD and Intel also produce

multicore CPUs of four or eight cores on a single chip. Now that’s firepower!

CHAPTER 5 CPUs 109

Passport / Mike Meyers‘ A+ Certification Passport / Meyers / 226308-3 / Chapter 5

FIGURE 5.6 AMD Athlon 64

FIGURE 5.7 Intel Core 2 Duo

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ZALMAN AMD Athlon/ Duron/Athlon XP Socket 462 CPU Manual de usuario Pagina 11