AMD K5 microprocessor family
AMD K5 is a Pentium-class 32-bit processor. It was the first x86 processor designed by AMD from the ground up, and not licensed or reverse-engineered as previous generations of x86 processors produced by AMD. Development of K5 microprocessor was announced in June of 1993. The processor was originally planned to be released in 1995 at speeds 100 - 120 MHz, but due to delays attributed to problems with testing and verifying the microprocessor design and compatibility with x86 software, the K5 was released in the March of 1996 at speeds 75 and 90 MHz.
Like other 5th generation x86 processors, the K5 included the following features: superscalar architecture, out of-order speculative execution, branch prediction, 64-bit data bus, integrated FPU, and power-management/SMM modes. Because the integer performance of the K5 was faster than similar clocked Pentium, the processor used Pentium rating (PR) instead of actual frequency to designate its performance. Alas, floating-point performance of the processor was much worse than its Pentium rating.
AMD K5 was produced in speeds up to 200 MHz (200 MHz version was not officially announced by AMD).
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