AMD K6-2
Marketing Logo
Developer	AMD
Manufacturer	AMD
Type	Microprocessors
Introduction	May 28, 1998 (announced) June, 1998 (launch)
Production	1998
Architecture	Pentium II-compatible superscalar microprocessors with MMX and 3DNow!
ISA	IA-32
µarch	K6-2
Word size	32 bit 4 octets 8 nibbles
Process	250 nm 0.25 μm 2.5e-4 mm
Technology	CMOS
Clock	233 MHz-550 MHz
Package	CPGA-321
Socket	Socket 7, Super Socket 7
Succession
←	→
K6	K6-III

K6-2 was a family of 32-bit x86 microprocessors introduced by AMD in early 1998 as a successor to the K6 family. These processors introduced a number of enhancements including support for Super Socket 7 with bus speeds of up to 100 MHz and 3DNow! SIMD extension. Due to its ability to extend the life of Socket 7-based systems and being relatively cheap, the K6-2 family of processors became a highly successful series with some models continued to be manufactured well past K6-III and K7 introduction.

Overview

Following AMD's acquisition of NexGen in 1995 and the success from the release of K6 (a rebranding of NegGen's Nx686), AMD had the financial means of developing the microarchitecture further. With the K6-2 family, AMD took the much safer and more straightforward approach approach and improved on K6 by adding a number new features as well as improving its overall performance, instead of a complete redesign.

AMD increased and improved much of the K6 microarchitecure by adding a number of additional units boosting the overall performance. The K6-2 was AMD's first series of processors to offer 3DNow!, an x86 extension that offered floating point SIMD instructions. The addition of 3DNow! gave floating point calculations a serious performance boost and a much necessery boost since Intel usually dominated the area of fast x87 applications. Despite being the first to introduce a series of SIMD instructions, 3DNow! never gained as much popularity as SEE did, a later implementation by Intel.

Super 7

Main article: Super 7

AMD previously used Socket 7 for their K6 chips which was the last socket specification AMD retained rights to. Intel ditched that socket in favor of Slot 1 partially in an attempt to lock AMD out of a number of improved features, leaving them with an outdated platform.

For the K6-2 AMD introduced an enhanced version of Socket 7 called Super 7 Socket. Super 7 maintained backwards compatibilitiy with the older Socket 7 but added support for a system bus of up to 100 MHz. Additionally support for AGP was also introduced.

The risky move by AMD and a number of chipset manufacturers paid off and by 1998 Super 7 proved to be a highly profitable business move.

Architecture

Main article: K6-2 Microarchitecture

AMD K6-2 Back side

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Die Shot

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Members

Three different types of K6-2 models were sold: Desktop PCs, Mobile, and Embedded systems.

K6-2 Desktop Models

Chomper Core

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Desktop K6-2 Processors
Model	Launched	Process	Freq	Mult.	Bus	Max Mem	VCORE	Package	Min Tcase	Max Tcase
K6-2/200AFR	4 June 1998	250 nm 0.25 μm 2.5e-4 mm	200 MHz 0.2 GHz 200,000 kHz	3	66.66 MHz 0.0667 GHz 66,660 kHz	4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB	2.2 V 22 dV 220 cV 2,200 mV		0 °C 273.15 K 32 °F 491.67 °R	70 °C 343.15 K 158 °F 617.67 °R
K6-2/233AFR	4 June 1998	250 nm 0.25 μm 2.5e-4 mm	233.33 MHz 0.233 GHz 233,330 kHz	3.5	66.66 MHz 0.0667 GHz 66,660 kHz	4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB	2.2 V 22 dV 220 cV 2,200 mV		0 °C 273.15 K 32 °F 491.67 °R	70 °C 343.15 K 158 °F 617.67 °R
K6-2/250AFR	4 June 1998	250 nm 0.25 μm 2.5e-4 mm	249.99 MHz 0.25 GHz 249,990 kHz	3	83.33 MHz 0.0833 GHz 83,330 kHz	4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB	2.2 V 22 dV 220 cV 2,200 mV		0 °C 273.15 K 32 °F 491.67 °R	70 °C 343.15 K 158 °F 617.67 °R
K6-2/266AFR	4 June 1998	250 nm 0.25 μm 2.5e-4 mm	266.66 MHz 0.267 GHz 266,660 kHz	4	66.66 MHz 0.0667 GHz 66,660 kHz	4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB	2.2 V 22 dV 220 cV 2,200 mV		0 °C 273.15 K 32 °F 491.67 °R	70 °C 343.15 K 158 °F 617.67 °R
K6-2/300AFR	4 June 1998	250 nm 0.25 μm 2.5e-4 mm	299.99 MHz 0.3 GHz 299,990 kHz	3	99.99 MHz 0.1 GHz 99,990 kHz	4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB	2.2 V 22 dV 220 cV 2,200 mV		0 °C 273.15 K 32 °F 491.67 °R	70 °C 343.15 K 158 °F 617.67 °R
K6-2/300AFR-66	4 June 1998	250 nm 0.25 μm 2.5e-4 mm	299.99 MHz 0.3 GHz 299,990 kHz	4.5	66.66 MHz 0.0667 GHz 66,660 kHz	4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB	2.2 V 22 dV 220 cV 2,200 mV		0 °C 273.15 K 32 °F 491.67 °R	70 °C 343.15 K 158 °F 617.67 °R
K6-2/333AFR	4 June 1998	250 nm 0.25 μm 2.5e-4 mm	333.66 MHz 0.334 GHz 333,660 kHz	3.5	95.33 MHz 0.0953 GHz 95,330 kHz	4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB	2.2 V 22 dV 220 cV 2,200 mV		0 °C 273.15 K 32 °F 491.67 °R	70 °C 343.15 K 158 °F 617.67 °R
K6-2/333AFR-66	4 June 1998	250 nm 0.25 μm 2.5e-4 mm	333.33 MHz 0.333 GHz 333,330 kHz	5	66.66 MHz 0.0667 GHz 66,660 kHz	4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB	2.2 V 22 dV 220 cV 2,200 mV		0 °C 273.15 K 32 °F 491.67 °R	70 °C 343.15 K 158 °F 617.67 °R
Count: 8

Chomper Extended ("CXT") Core

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Desktop K6-2 Processors
Model	Launched	Process	Freq	Mult.	Bus	Max Mem	VCORE	Package	Min Tcase	Max Tcase
K6-2/300AFR-66	4 June 1998	250 nm 0.25 μm 2.5e-4 mm	299.99 MHz 0.3 GHz 299,990 kHz	4.5	66.66 MHz 0.0667 GHz 66,660 kHz	4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB	2.2 V 22 dV 220 cV 2,200 mV		0 °C 273.15 K 32 °F 491.67 °R	70 °C 343.15 K 158 °F 617.67 °R
K6-2/333AFR	4 June 1998	250 nm 0.25 μm 2.5e-4 mm	333.66 MHz 0.334 GHz 333,660 kHz	3.5	95.33 MHz 0.0953 GHz 95,330 kHz	4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB	2.2 V 22 dV 220 cV 2,200 mV		0 °C 273.15 K 32 °F 491.67 °R	70 °C 343.15 K 158 °F 617.67 °R
K6-2/333AFR-66	4 June 1998	250 nm 0.25 μm 2.5e-4 mm	333.33 MHz 0.333 GHz 333,330 kHz	5	66.66 MHz 0.0667 GHz 66,660 kHz	4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB	2.2 V 22 dV 220 cV 2,200 mV		0 °C 273.15 K 32 °F 491.67 °R	70 °C 343.15 K 158 °F 617.67 °R
K6-2/337AFR	1998	250 nm 0.25 μm 2.5e-4 mm	337 MHz 0.337 GHz 337,000 kHz	4.5	75 MHz 0.075 GHz 75,000 kHz	4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB	2.2 V 22 dV 220 cV 2,200 mV		0 °C 273.15 K 32 °F 491.67 °R	70 °C 343.15 K 158 °F 617.67 °R
K6-2/350AFQ	15 October 1999	250 nm 0.25 μm 2.5e-4 mm	349.99 MHz 0.35 GHz 349,990 kHz	3.5	99.99 MHz 0.1 GHz 99,990 kHz	4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB	2.2 V 22 dV 220 cV 2,200 mV		0 °C 273.15 K 32 °F 491.67 °R	60 °C 333.15 K 140 °F 599.67 °R
K6-2/350AFR	15 October 1999	250 nm 0.25 μm 2.5e-4 mm	349.99 MHz 0.35 GHz 349,990 kHz	3.5	99.99 MHz 0.1 GHz 99,990 kHz	4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB	2.2 V 22 dV 220 cV 2,200 mV		0 °C 273.15 K 32 °F 491.67 °R	70 °C 343.15 K 158 °F 617.67 °R
K6-2/366AFR	15 October 1999	250 nm 0.25 μm 2.5e-4 mm	366.66 MHz 0.367 GHz 366,660 kHz	5.5	66.66 MHz 0.0667 GHz 66,660 kHz	4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB	2.2 V 22 dV 220 cV 2,200 mV		0 °C 273.15 K 32 °F 491.67 °R	70 °C 343.15 K 158 °F 617.67 °R
K6-2/380AFR	15 October 1999	250 nm 0.25 μm 2.5e-4 mm	380 MHz 0.38 GHz 380,000 kHz	4	95 MHz 0.095 GHz 95,000 kHz	4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB	2.2 V 22 dV 220 cV 2,200 mV		0 °C 273.15 K 32 °F 491.67 °R	70 °C 343.15 K 158 °F 617.67 °R
K6-2/400AFQ	15 October 1999	250 nm 0.25 μm 2.5e-4 mm	399.99 MHz 0.4 GHz 399,990 kHz	4	99.99 MHz 0.1 GHz 99,990 kHz	4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB	2.2 V 22 dV 220 cV 2,200 mV		0 °C 273.15 K 32 °F 491.67 °R	60 °C 333.15 K 140 °F 599.67 °R
K6-2/400AFQ-66	15 October 1999	250 nm 0.25 μm 2.5e-4 mm	399.99 MHz 0.4 GHz 399,990 kHz	6	66.66 MHz 0.0667 GHz 66,660 kHz	4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB	2.2 V 22 dV 220 cV 2,200 mV		0 °C 273.15 K 32 °F 491.67 °R	60 °C 333.15 K 140 °F 599.67 °R
K6-2/400AFR	15 October 1999	250 nm 0.25 μm 2.5e-4 mm	399.99 MHz 0.4 GHz 399,990 kHz	4	99.99 MHz 0.1 GHz 99,990 kHz	4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB	2.2 V 22 dV 220 cV 2,200 mV		0 °C 273.15 K 32 °F 491.67 °R	70 °C 343.15 K 158 °F 617.67 °R
K6-2/400AFR-66	15 October 1999	250 nm 0.25 μm 2.5e-4 mm	399.99 MHz 0.4 GHz 399,990 kHz	6	66.66 MHz 0.0667 GHz 66,660 kHz	4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB	2.2 V 22 dV 220 cV 2,200 mV		0 °C 273.15 K 32 °F 491.67 °R	70 °C 343.15 K 158 °F 617.67 °R
K6-2/400AHX	15 October 1999	250 nm 0.25 μm 2.5e-4 mm	399.99 MHz 0.4 GHz 399,990 kHz	4	99.99 MHz 0.1 GHz 99,990 kHz	4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB	2.4 V 24 dV 240 cV 2,400 mV		0 °C 273.15 K 32 °F 491.67 °R	65 °C 338.15 K 149 °F 608.67 °R
K6-2/400AHX-66	15 October 1999	250 nm 0.25 μm 2.5e-4 mm	399.99 MHz 0.4 GHz 399,990 kHz	6	66.66 MHz 0.0667 GHz 66,660 kHz	4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB	2.4 V 24 dV 240 cV 2,400 mV		0 °C 273.15 K 32 °F 491.67 °R	65 °C 338.15 K 149 °F 608.67 °R
K6-2/450AFX	11 March 1999	250 nm 0.25 μm 2.5e-4 mm	449.99 MHz 0.45 GHz 449,990 kHz	4.5	99.99 MHz 0.1 GHz 99,990 kHz	4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB	2.2 V 22 dV 220 cV 2,200 mV		0 °C 273.15 K 32 °F 491.67 °R	65 °C 338.15 K 149 °F 608.67 °R
K6-2/450AGX	11 March 1999	250 nm 0.25 μm 2.5e-4 mm	449.99 MHz 0.45 GHz 449,990 kHz	4.5	99.99 MHz 0.1 GHz 99,990 kHz	4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB	2.3 V 23 dV 230 cV 2,300 mV		0 °C 273.15 K 32 °F 491.67 °R	65 °C 338.15 K 149 °F 608.67 °R
K6-2/450AHX	11 March 1999	250 nm 0.25 μm 2.5e-4 mm	449.99 MHz 0.45 GHz 449,990 kHz	4.5	99.99 MHz 0.1 GHz 99,990 kHz	4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB	2.4 V 24 dV 240 cV 2,400 mV		0 °C 273.15 K 32 °F 491.67 °R	65 °C 338.15 K 149 °F 608.67 °R
K6-2/475AFX	15 April 1999	250 nm 0.25 μm 2.5e-4 mm	475 MHz 0.475 GHz 475,000 kHz	5	95 MHz 0.095 GHz 95,000 kHz	4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB	2.2 V 22 dV 220 cV 2,200 mV		0 °C 273.15 K 32 °F 491.67 °R	65 °C 338.15 K 149 °F 608.67 °R
K6-2/475AHX	15 April 1999	250 nm 0.25 μm 2.5e-4 mm	475 MHz 0.475 GHz 475,000 kHz	5	95 MHz 0.095 GHz 95,000 kHz	4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB	2.4 V 24 dV 240 cV 2,400 mV		0 °C 273.15 K 32 °F 491.67 °R	65 °C 338.15 K 149 °F 608.67 °R
K6-2/500AFX	11 March 1999	250 nm 0.25 μm 2.5e-4 mm	499.99 MHz 0.5 GHz 499,990 kHz	5	99.99 MHz 0.1 GHz 99,990 kHz	4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB	2.2 V 22 dV 220 cV 2,200 mV		0 °C 273.15 K 32 °F 491.67 °R	65 °C 338.15 K 149 °F 608.67 °R
K6-2/500AHX	11 March 1999	250 nm 0.25 μm 2.5e-4 mm	499.99 MHz 0.5 GHz 499,990 kHz	5	99.99 MHz 0.1 GHz 99,990 kHz	4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB	2.4 V 24 dV 240 cV 2,400 mV		0 °C 273.15 K 32 °F 491.67 °R	65 °C 338.15 K 149 °F 608.67 °R
K6-2/533AFX	11 March 1999	250 nm 0.25 μm 2.5e-4 mm	533.33 MHz 0.533 GHz 533,330 kHz	5	96.99 MHz 0.097 GHz 96,990 kHz	4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB	2.2 V 22 dV 220 cV 2,200 mV		0 °C 273.15 K 32 °F 491.67 °R	65 °C 338.15 K 149 °F 608.67 °R
K6-2/550AFX	22 February 2000	250 nm 0.25 μm 2.5e-4 mm	549.99 MHz 0.55 GHz 549,990 kHz	5.5	99.99 MHz 0.1 GHz 99,990 kHz	4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB	2.2 V 22 dV 220 cV 2,200 mV		0 °C 273.15 K 32 °F 491.67 °R	65 °C 338.15 K 149 °F 608.67 °R
K6-2/550AGR	22 February 2000	250 nm 0.25 μm 2.5e-4 mm	549.99 MHz 0.55 GHz 549,990 kHz	5.5	99.99 MHz 0.1 GHz 99,990 kHz	4,096 MiB 4,194,304 KiB 4,294,967,296 B 4 GiB 0.00391 TiB	2.3 V 23 dV 230 cV 2,300 mV		0 °C 273.15 K 32 °F 491.67 °R	65 °C 338.15 K 149 °F 608.67 °R
Count: 24

K6-2 Mobile Models

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K6-2 Embedded Models

K6-2E were manufactured by AMD's Embedded design group and usually came with a different set of warranties. Embedded models were offered at higher operating temperatures and lower operating voltages.

This section is empty; you can help add the missing info by editing this page.

Documents

DataSheet

• AMD-K6-2 Processor Data Sheet; Publication #21850 Revision J/0, February 2000
• AMD-K6-2E Processor Data Sheet; Publication #22529 Revision B/0, January 2000
• Mobile AMD-K6-2 Processor Data Sheet; Publication #21896 Revision E/0, May 2000

Other

• AMD-K6-2 Processor Revision Guide - Model 8; Publication #21641 Revision F/0, June 1999

See also

• AMD K6
• Centaur WinChip
• Intel Pentium II