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Slot A refers to the physical and electrical specification for a 242-lead single-edge-connector used by early versions of AMD's Athlon
Athlon

Athlon is the brand name applied to a series of different x86 Central processing unit designed and manufactured by Advanced Micro Devices. The original Athlon was the first seventh-generation x86 processor and, in a first, retained the initial performance lead it had over Intel Corporation's competing processors for a significant period of t...
 processor.

The Slot A connector allows for a higher bus rate than Socket 7
Socket 7

Socket 7 is a physical and electrical specification for an x86-style Central processing unit socket on a personal computer motherboard. The socket supersedes the earlier Socket 5, and accepts Pentium microprocessors manufactured by Intel, as well as compatibles made by Cyrix/IBM, AMD, Integrated Device Technology and others....
 or Super Socket 7
Super Socket 7

The Super Socket 7, also referred to as Super 7, is an extension of the Socket 7 Zero insertion force socket specification. It features a 100 Megahertz front-side bus, support for Accelerated Graphics Port, and a SPGA package....
. Slot A motherboards use the EV6 bus protocol, a technology originally developed by Digital Equipment Corporation
Digital Equipment Corporation

Digital Equipment Corporation was a pioneering United States company in the computer industry. It is often referred to within the computing industry as DEC ....
 (DEC) for their Alpha 21264
Alpha 21264

The Alpha 21264 is a microprocessor developed and fabricated by Digital Equipment Corporation that implemented the DEC Alpha instruction set architecture ....
 microprocessor.

Slot A is mechanically compatible but electrically incompatible with Intel's Slot 1
Slot 1

Slot 1 refers to the physical and electrical specification for the connector used by some of Intel's microprocessors, including the Celeron, Pentium II and the Pentium III....
.






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Slot A refers to the physical and electrical specification for a 242-lead single-edge-connector used by early versions of AMD's Athlon
Athlon

Athlon is the brand name applied to a series of different x86 Central processing unit designed and manufactured by Advanced Micro Devices. The original Athlon was the first seventh-generation x86 processor and, in a first, retained the initial performance lead it had over Intel Corporation's competing processors for a significant period of t...
 processor.

The Slot A connector allows for a higher bus rate than Socket 7
Socket 7

Socket 7 is a physical and electrical specification for an x86-style Central processing unit socket on a personal computer motherboard. The socket supersedes the earlier Socket 5, and accepts Pentium microprocessors manufactured by Intel, as well as compatibles made by Cyrix/IBM, AMD, Integrated Device Technology and others....
 or Super Socket 7
Super Socket 7

The Super Socket 7, also referred to as Super 7, is an extension of the Socket 7 Zero insertion force socket specification. It features a 100 Megahertz front-side bus, support for Accelerated Graphics Port, and a SPGA package....
. Slot A motherboards use the EV6 bus protocol, a technology originally developed by Digital Equipment Corporation
Digital Equipment Corporation

Digital Equipment Corporation was a pioneering United States company in the computer industry. It is often referred to within the computing industry as DEC ....
 (DEC) for their Alpha 21264
Alpha 21264

The Alpha 21264 is a microprocessor developed and fabricated by Digital Equipment Corporation that implemented the DEC Alpha instruction set architecture ....
 microprocessor.

Slot A is mechanically compatible but electrically incompatible with Intel's Slot 1
Slot 1

Slot 1 refers to the physical and electrical specification for the connector used by some of Intel's microprocessors, including the Celeron, Pentium II and the Pentium III....
. As a consequence, Slot A motherboards were designed to have the connector's installed orientation be rotated 180 degrees relative to Slot 1 motherboards to discourage accidental insertion of a Slot 1 processor into a Slot A motherboard, and vice versa . The choice to use the same mechanical connector as the Intel Slot 1 also allowed motherboard manufacturers to keep costs down by stocking the same part for both Slot 1 and Slot A assemblies.

Slot A was superseded by Socket A
Socket A

Socket A is the CPU socket used for AMD central processing unit ranging from the Athlon Thunderbird#Athlon Thunderbird .28T-Bird.29 to the Athlon#Athlon XP 3200+, and AMD budget processors including the Duron and Sempron....
.