Family Am 5k86

The microprocessor 5k86 (K5 or SSA/5) was first of the processors of the fifth generation issued AMD. Due to use identical with Pentium конструктива Socket 5/7 and pressure(voltage) of a feed(meal), he is compatible with the majority of parent payments Pentium (support in BIOS is required, basically, for a correct designation of the processor at a stage of loading). The first devices of this family — AMD-K5-PR75, PR90 and PR100 — on productivity corresponded(met) to processor Pentium with clock frequencies 75, 90 and 100 MHz and worked on these frequencies. Devices of the second wave — AMD-K5-PR120, PR133 and PR166 — have been designed for clock frequencies 90, 100 and 111,5 MHz accordingly. The matter is that for a designation of processors of family K5 firm AMD used so-called P-Rating — clock frequency of similar processor Pentium on productivity (under tests Winstone). For example, processor K5-PR133 actually works on frequency of 100 MHz. All processors of family K5 use a pressure(voltage) of a feed(meal) of 3,52 Century.

Among hardware innovations in K5 we shall note a separate cache of the first level (16 Kb for commands and 8 Kb for the data); the $5-in steps RISC-like conveyor, a dynamic prediction of transitions and conditional performance. Processors K5 do not contain controller APIC and consequently cannot work in multiprocessing systems. On calculations with a floating point processors K5 concede Pentium. Nevertheless, due to the low price and good productivity, processors K5 were successfully used in office systems of an initial level for which mainly integer operations while on change by him(it) there did not come the processors of sixth generation AMD-K6 MMX Enhanced which are not conceding Pentium Pro and Pentium are characteristic.

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