Am486

The Microprocesseur Am486 was presented by AMD in 1993. It is compatible a X86, comparable with the Intel 80486.

Intel exceeded AMD on the market during about four years, but AMD sold its 486 - 40 MHz with the price or in lower part of the price of an Intel with 33 MHz, offering approximately 20% of performances in more for the same price. First processors AMD 486 were made to replace their Intel equivalent, but later AMD doubled the frequency from its 486, while lowering the tension with 3.3 volts whereas that of Intels were to 5 volt. What limited their resale as processors of update, until an adapter of food appeared on the market.

Processors AMD 486, just like their equivalent Cyrix, were less powerful in the benchmarks than their Intel equivalent. The 486 of AMD were compared with frequency equivalent to that of Intel.

Whereas the Am386 were at the beginning used by the small one manufacturing computers, Am486DX, DX2 and SX2 were accepted by a broader pallet of retailer, particularly Acer and Compaq in 1994.

The 486 of AMD having the frequencies of the highest clock had higher performances has that of first Pentiums, particulèrement the 60 and 66 MHz. Their equivalent, the processors Intel 80486DX4 were expensive and required a minor modification of the socket. Although they twice had the mask of a AMD, and performance slightly higher, AMD DX4-100 were less expensive than an Intel DX2-66.

The processor AMD 5x86 133MHz AMD is improved Am486.

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