Mips the 486 executes one instruction per cycle so 50

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MIPS. The 486 executes one instruction per cycle, so 50 X 1 is equal to 50 MIPS. The classic Pentium I, because of its super scalar architecture, branch prediction logic, etc., executes two instructions per cycle, or 100 X 2 equals 200 MIPS. The 100-megahertz is roughly 4 times faster than the 50 megahertz 486 microprocessor. P a g e 37 | 61 INTRODUCTION TO COMPUTER PROCESSING AND PROCESSOR ARCHITECTURE
3.7.1 Limitations using Clock Speeds as a Professor Performance indicator The System z EC-12 mainframe uses a processor rated at 5.5-gigahertz. However, many Intel and AMD gaming enthusiasts will over clock their processors to clock speeds beyond 8-gigahertz. This strategy is called over- clocking. Is IBM System z behind the times? The answer is an emphatic NO! The higher the clock speed the greater the probability or electro-magnetic interference, lost data or incorrectly executed instructions. A gaming enthusiast will never notice a minor flaw in a streaming video or incorrectly processed gaming instruction. But, a one bit execution error it the execution a major commercial bank application may cause a billion dollar error. IBM does NOT permit over clocking and guarantees that there will be NO hardware processing error or hardware downtime. 3.8 Benchmark Programs PC Magazine has been using a suite of testing programs as a substitute for the traditional MIPS/GIPS measurement. These tests try to tack in account the large variety of tasks performed by today’s microprocessors. While better than traditional MIP measurements, they still fail to consider that a microprocessor is only one of the components of modern computer system. A computer operates at the speed of its slowest component. While the processor is rarely a bottleneck in today’s computers, other components prevent today’s modern processors from reaching their true potential. People simply overbuy processor technology. Processor performance is only one of the components that makes a user perceive a faster computer system. Video adapter, amount of internal memory, type of disk controllers and other factors affect the overall performance of a computer system. In the past I had replaced both a 50-megahertz 486 CAD workstation and a 50-megahertz file server with 100 megahertz Pentium processors. Theoretically, the increase in performance would be four-times. But, would the users perceive this performance increase with both applications. The CAD application which uses a heavy mix of floating point mathematical calculations would benefit greatly from Pentium. On the other hand, a Pentium file server, which uses a large mix of disk and network interface card input/output, would receive only a modest improvement in performance. Network managers frequently upgrade their file servers to the older Pentium III and are disappointed with the improvement in performance. The old fashion 100-megahertz Ethernet network interface card cannot provide enough bandwidth workload to power the Pentium III processor and it frequently has to wait for slow hard disk

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