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K6-2
The K6-2 is an x86 microprocessor introduced by AMD on May 28, 1998, and available in speeds ranging from 266 to 550 MHz. An enhancement of the original K6, the K6-2 introduced AMD's 3DNow! SIMD instruction set and an upgraded system-bus interface called Super Socket 7, which was backward compatible with older Socket 7 motherboards. It was manufactured using a 250 nanometer process, ran at 2.2 volts, and had 9.3 million transistors. History The K6-2 was designed as a competitor to Intel's flagship processor, the significantly more expensive Pentium II. Performance of the two chips was similar: the previous K6 tended to be faster for general-purpose computing, while the Intel part was faster in x87 floating-point applications. To battle the Pentium II's dominance on floating point calculations the K6-2 was the first CPU to introduce a floating point SIMD instruction set (dubbed 3DNow! by AMD), which significantly boosted performance. However programs needed to be specifically ...
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AMD K6-III
The K6-III (code name: "Sharptooth") was an x86 microprocessor line manufactured by AMD that launched on February 22, 1999. The launch consisted of both 400 and 450 MHz models and was based on the preceding K6-2 architecture. Its improved 256 KB on-chip L2 cache gave it significant improvements in system performance over its predecessor the K6-2. The K6-III was the last processor officially released for desktop Socket 7 systems, however later mobile K6-III+ and K6-2+ processors could be run unofficially in certain socket 7 motherboards if an updated BIOS was made available for a given board. The Pentium III processor from Intel launched 6 days later. At its release, the fastest available desktop processor from Intel was the Pentium II 450 MHz, and in integer application benchmarks a 400 MHz K6-III was able to beat it as the fastest processor available for business applications. Just days later on February 28 Intel released the Pentium III "Katmai" line at speeds of ...
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AMD K6
The K6 microprocessor was launched by AMD in 1997. The main advantage of this particular microprocessor is that it was designed to fit into existing desktop designs for Pentium-branded CPUs. It was marketed as a product that could perform as well as its Intel Pentium II equivalent but at a significantly lower price. The K6 had a considerable impact on the PC market and presented Intel with serious competition. Background The AMD K6 is a superscalar P5 Pentium-class microprocessor, manufactured by AMD, which superseded the K5. The AMD K6 is based on the Nx686 microprocessor that NexGen was designing when it was acquired by AMD. Despite the name implying a design evolving from the K5, it is in fact a totally different design that was created by the NexGen team, including chief processor architect Greg Favor, and adapted after the AMD purchase. The K6 processor included a feedback dynamic instruction reordering mechanism, MMX instructions, and a floating-point unit (FPU). It ...
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Super Socket 7
Super Socket 7, also referred to as Super 7, is a hardware-level extension of the Socket 7 Zero insertion force, ZIF socket specification for x86 processors. It was released in May 1998. Compatible motherboards and chipsets use a standard Socket 7 connection for the CPU, while adding certain features including a maximum 100 Megahertz, MHz front-side bus and support for Accelerated Graphics Port, AGP graphics cards. Super Socket 7 was used by Advanced Micro Devices, AMD AMD K6-2, K6-2 and AMD K6-III, K6-III processors, some of the final Cyrix M-II processors, some of the final Integrated Device Technology, IDT WinChip, WinChip 2 processors, and Rise Technology, Rise mP6 processors. It is backward compatibility, backward compatible with Socket 7 CPUs, meaning a Socket 7 CPU can be used with a Super Socket 7 motherboard, but a Super Socket 7 CPU cannot operate at full speed in a Socket 7 motherboard. Socket 5 CPUs are pin-compatible with Super Socket 7, but not all motherboards d ...
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3DNow!
3DNow! is a deprecated extension to the x86 instruction set developed by Advanced Micro Devices (AMD). It adds single instruction multiple data (SIMD) instructions to the base x86 instruction set, enabling it to perform vector processing of floating-point vector operations using vector registers. This improvement enhances the performance of many graphics-intensive applications. The first microprocessor to implement 3DNow! was the AMD K6-2, introduced in 1998. In appropriate applications, this enhancement raised the speed by about 2–4 times. However, the instruction set never gained much popularity, and AMD announced in August 2010 that support for 3DNow! would be dropped in future AMD processors, except for two instructions, PREFETCH and PREFETCHW. These two instructions are also available in Bay-Trail Intel processors. History 3DNow! was developed at a time when 3D graphics were becoming mainstream in PC multimedia and games. Realtime display of 3D graphics depended heavily ...
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Duron
Duron is a line of budget x86-compatible microprocessors manufactured by Advanced Micro Devices, AMD and released on June 19, 2000. Duron was intended to be a lower-cost offering to complement AMD's then mainstream performance Athlon processor line, and it also competed with rival chipmaker Intel's Pentium III and Celeron processor offerings. The Duron brand name was retired in 2004, succeeded by AMD's Sempron line of processors as their budget offering. Performance The original Duron processors were derived from AMD's mainstream ''Athlon'' Athlon#Athlon Thunderbird, Thunderbird processors, the primary difference being a reduction in L2 cache size to 64 Binary prefix, KB from the Athlon's 256 KB. This was a relatively severe reduction, making it even smaller than the 128 KB L2 available on Intel's competing budget Celeron line. However, the originating Thunderbird architecture already featured one of the largest L1 caches at 128 KB (which was not reduced i ...
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Socket 7
Socket 7 is a physical and electrical specification for an x86-style CPU socket on a personal computer motherboard. It was released in June 1995. The socket supersedes the earlier Socket 5, and accepts P5 Pentium microprocessors manufactured by Intel, as well as compatibles made by Cyrix/IBM, AMD, IDT and others. Socket 7 was the only socket that supported a wide range of CPUs from different manufacturers and a wide range of speeds. Differences between Socket 5 and Socket 7 are that Socket 7 has an extra pin and is designed to provide dual split rail voltage, as opposed to Socket 5's single voltage. However, not all motherboard manufacturers supported the dual voltage on their boards initially. Socket 7 is backwards compatible; a Socket 5 CPU can be inserted and used on a Socket 7 motherboard. Processors that used Socket 7 are the AMD K5 and K6, the Cyrix 6x86 and 6x86MX, the IDT WinChip, the Intel P5 Pentium (2.5–3.5 V, 75–200 MHz), the Pentium MMX (166–233 ...
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L2 Cache
A CPU cache is a hardware cache used by the central processing unit (CPU) of a computer to reduce the average cost (time or energy) to access data from the main memory. A cache is a smaller, faster memory, located closer to a processor core, which stores copies of the data from frequently used main memory locations. Most CPUs have a hierarchy of multiple cache levels (L1, L2, often L3, and rarely even L4), with different instruction-specific and data-specific caches at level 1. The cache memory is typically implemented with static random-access memory (SRAM), in modern CPUs by far the largest part of them by chip area, but SRAM is not always used for all levels (of I- or D-cache), or even any level, sometimes some latter or all levels are implemented with eDRAM. Other types of caches exist (that are not counted towards the "cache size" of the most important caches mentioned above), such as the translation lookaside buffer (TLB) which is part of the memory management unit (MMU) whic ...
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CPUID
In the x86 architecture, the CPUID instruction (identified by a CPUID opcode) is a processor supplementary instruction (its name derived from " CPU Identification") allowing software to discover details of the processor. It was introduced by Intel in 1993 with the launch of the Pentium and SL-enhanced 486 processors. A program can use the CPUID to determine processor type and whether features such as MMX/ SSE are implemented. History Prior to the general availability of the CPUID instruction, programmers would write esoteric machine code which exploited minor differences in CPU behavior in order to determine the processor make and model. With the introduction of the 80386 processor, EDX on reset indicated the revision but this was only readable after reset and there was no standard way for applications to read the value. Outside the x86 family, developers are mostly still required to use esoteric processes (involving instruction timing or CPU fault triggers) to determine th ...
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Unofficial Patch
An unofficial patch, sometimes alternatively called a community patch, is a patch for a piece of software, created by a third party such as a user community without the involvement of the original developer. Similar to an ordinary patch, it alleviates bugs or shortcomings. Unofficial patches do not usually change the intended usage of the software, in contrast to other third-party software adaptions such as mods or cracks. Motivation A common motivation for the creation of unofficial patches is missing technical support by the original software developer or provider. Reasons may include: *the software product reached its defined end-of-life and/or was superseded by a successor product ( planned obsolescence) * the software was originally designed to operate in a substantially different environment and may require improvement/optimization ( porting) * the developer has gone out of business and is not available anymore *support is not economically viable (e.g. localization f ...
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Tom's Hardware
''Tom's Hardware'' is an online publication owned by Future plc and focused on technology. It was founded in 1996 by Thomas Pabst. It provides articles, news, price comparisons, videos and reviews on computer hardware and high technology. The site features coverage on CPUs, motherboards, RAM, PC cases, graphic cards, display technology, power supplies and displays, storage, smartphones, tablets, gaming, consoles, and computer peripherals. ''Tom's Hardware'' has a forum and featured blogs. History ''Tom's Hardware'' was founded in 1996 as ''Tom's Hardware Guide'' in Canada by Thomas Pabst. It started using the domain tomshardware.com in September 1997 and was followed by several foreign language versions, including Italian, French, Finnish and Russian based on franchise agreements. While the initial testing labs were in Germany and California, much of ''Tom's Hardware'''s testing now occurs in New York and a facility in Ogden, Utah owned by its parent company. In April 20 ...
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Micrometre
The micrometre (English in the Commonwealth of Nations, Commonwealth English as used by the International Bureau of Weights and Measures; SI symbol: μm) or micrometer (American English), also commonly known by the non-SI term micron, is a unit of length in the International System of Units (SI) equalling (SI standard prefix "micro-" = ); that is, one millionth of a metre (or one thousandth of a millimetre, , or about ). The nearest smaller common SI Unit, SI unit is the nanometre, equivalent to one thousandth of a micrometre, one millionth of a millimetre or one billionth of a metre (). The micrometre is a common unit of measurement for wavelengths of infrared radiation as well as sizes of biological cell (biology), cells and bacteria, and for grading wool by the diameter of the fibres. The width of a single human hair ranges from approximately 20 to . Examples Between 1 μm and 10 μm: * 1–10 μm – length of a typical bacterium * 3–8 μm – width of str ...
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