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36 RS/6000 43P 7043 Models 150 and 260 Handbook
clock frequency of 160 MHz, POWER3 is targeting up to 600 MHz by
exploiting more advanced chip manufacturing processes, such as copper
technology. The first POWER3 based system, RS/6000 43P 7043 Model 260,
runs at 200 MHz.
Features of the POWER3, exceeding its predecessor (P2SC), include:
• A second load-store unit
• Improved memory access speed
• Speculative execution
Figure 10 shows the POWER3 microprocessor architecture.
Figure 10. POWER3 Microprocessor Logical Block Diagram