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Encyclopedia > Am386
AMD Am386DX-40 CPU
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AMD Am386DX-40 CPU

The Am386 central processing unit microprocessor was released by AMD in 1991. A 100%-compatible clone of the Intel 80386 design, it sold millions of units and positioned AMD as a legitimate competitor to Intel, rather than just a second source for Intel's x86 CPUs. Image File history File links Download high resolution version (1182x957, 390 KB)AMD Am386DX-40 microprocessor Image taken by MaXim File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Image File history File links Download high resolution version (1182x957, 390 KB)AMD Am386DX-40 microprocessor Image taken by MaXim File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... This CPU uses numerous pins to connect to the motherboard. ... Microprocessors, including an Intel 80486DX2 and an Intel 80386 A microprocessor (abbreviated as µP or uP) is an electronic computer central processing unit (CPU) made from miniaturized transistors and other circuit elements on a single semiconductor integrated circuit (IC) (aka microchip or just chip). ... Advanced Micro Devices, Inc. ... 1991 is a common year starting on Tuesday of the Gregorian calendar. ... An Intel 80386 Microprocessor The Intel 80386 is a microprocessor which was used as the central processing unit (CPU) of many personal computers from 1986 until 1994 and later. ...


While the CPU was essentially ready to be released prior to 1991, Intel kept it tied up in court. AMD had previously been a second-source manufacturer of Intel's designs, and AMD's interpretation of the contract was that it covered all of them. Intel, however, claimed that the contract only covered the 80286 and prior processors. After a few years in the courtrooms, AMD finally won the case and the right to sell their Am386. This paved the way for competition in the CPU market and thus lowered the cost of owning a PC.


While Intel's 386 design peaked at 33 MHz, AMD released a 40 MHz version of both its 386DX and 386SX, extending the lifespan of the architecture. The AMD 386DX-40 was very popular with small manufacturers of PC clones and with budget-minded computer enthusiasts, because the 386DX-40 could match or even slightly outperform a 486SX-25 in popular benchmarks while costing less, and even edged ahead of the 486DX-33 in many real-world performance tests. This was mostly because the Am386DX-40 ran its front side bus at the same 40 MHz speed as the processor itself, while the fastest 486 of the time only ran a 33MHz FSB. Performance could be further boosted with the addition of an inexpensive 387DX math coprocessor, although the floating-point performance was nowhere near that of the 486DX, making the Am386DX in any variation a poor choice for 3D games or CAD. However, both were niche markets in the early 1990s and the chip sold well, first as a mid-range, and then as a budget chip. Although the chip often struggled under Windows 95's increased CPU and memory requirements, it was sold into the mid 1990s, both as an embedded chip, and on budget motherboards for those who were only interested in running MS-DOS or Windows 3.1 applications. In computing, a benchmark is the result of running a computer program, or a set of programs, in order to assess the relative performance of an object, by running a number of standard tests and trials against it. ... Front Side Bus (FSB) is the term used to describe the CPU data bus. ... A coprocessor is a computer processor used to supplement the functions of the primary processor (the CPU). ... A floating-point number is a digital representation for a number in a certain subset of the rational numbers, and is often used to approximate an arbitrary real number on a computer. ... This article is about computer-aided design. ... Windows 95 (codename Chicago) is a hybrid 16-bit/32-bit graphical operating system released on August 24, 1995 by the Microsoft Corporation. ... Microsofts disk operating system, MS-DOS, was Microsofts implementation of DOS, which was the first popular operating system for the IBM PC, and until recently, was widely used on the PC compatible platform. ... A typical Windows 3. ...


External links

  • AMD.com: Am386® Family 32-bit Processors
  • cpu-collection.de: Pictures
  • AMD: 30 Years of Pursuing the Leader. Part 2



List of AMD microprocessors | List of AMD CPU slots, sockets

Am2900 | Am29000 | Am286 | Am386 | Am486 | Am5x86 | K5 | K6 | K6-2 | K6-III | Duron | Sempron | Athlon | Athlon 64 | Athlon 64 FX | Athlon 64 X2 | Turion 64 | Opteron   (note: italics indicate non-x86-architecture processors) AMD logo, claiming fair use This is a copyrighted and/or trademarked logo. ... This article gives is a list of Advanced Micro Devices (AMD)-made microprocessors (µPs), sorted by generation and release year. ... Here is a list of sockets and slots used by AMD central processing units: Am486: Same as Intel. ... The AMD 29000, often simply 29k, was a popular family of RISC-based 32-bit microprocessors and microcontrollers from Advanced Micro Devices. ... AMD started in the x86 business as a second-source manufacturer for Intels chip designs. ... The Am486 was a 80486-class family of computer processors that were produced by AMD in the 1990s. ... AMD 5x86-P75 The AMD 5x86 processor is an x86-compatible CPU introduced in 1995 by AMD for use in 486-class computer systems. ... The K5 was developed by AMD to compete with Intels Pentium microprocessor range. ... History 1997 saw the arrival of AMDs K6 microprocessor. ... The K6-2 was a x86 microprocessor manufactured by AMD, available in speeds ranging from 266 to 550 MHz. ... The K6-III was an x86 microprocessor manufactured by AMD, the last and fastest of all Socket 7 processors. ... The AMD Duron is an x86-compatible computer processor manufactured by AMD. It was released in the summer of 2000 as a low-cost alternative to AMDs own Athlon processor and the Pentium III and Celeron processor lines from rival Intel. ... Sempron 3000+ Sempron is AMDs newest low-end CPU. It is replacing the Duron processor, and will compete against Intels Celeron D processor. ... Athlon is the brand name applied to a series of different x86 processors designed and manufactured by AMD. The original Athlon, or Athlon Classic, was the first seventh-generation x86 processor and, in a first, retained the initial performance lead it had over Intels competing processors for a significant... The Athlon 64 (codenamed ClawHammer, Newcastle, Winchester, Venice, and San Diego) represents AMDs entry into the consumer 64-bit microprocessor market, released on September 23rd, 2003. ... The Athlon 64 FX is an AMD K8 series processor targeted at enthusiasts. ... The Athlon 64 X2 is the first dual-core desktop CPU manufactured by AMD. It is essentially a processor consisting of two Athlon 64 cores joined together on one die with some additional control logic. ... Turion 64 is AMDs 64-bit mobile processor, intended to compete with Intels Pentium M. It is compatible with AMDs Socket 754 and is equipped with 512 or 1024 KB of L2 cache, a 64-bit single channel on-die memory controller, and an 800MHz HyperTransport bus. ... The AMD Opteron is the first eighth-generation x86 processor (K8 core), and the first of AMDs AMD64 (x86-64) processors, released April 22, 2003. ... x86 or 80x86 is the generic name of a microprocessor architecture first developed and manufactured by Intel. ...


  Results from FactBites:
 
Electronic News: 386 gives AMD 'hold.' - Advanced Micro Devices - What They're Saying - Column (803 words)
This growth reflected the impact of sales of its Am386 chips, which grew to $146 million, or 40 percent of total sales, from $59 million in the September quarter.
Neff adds, it is basing its outlook on demand for the Am386 family, which it said could grow to more than $180 million in the March quarter.
The analyst is raising his EPS estimate for 1992 from $1.50 to $2.50, which reflects sales of $1.5 billion to $1.6 billion, gross margins of about 51 percent for the year, moderate expense growth and a low tax rate due to carryforwards.
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