Comparison: T-Bred "B" Vs. T-Bred "A" Vs. Palomino, Continued

TOM'S HARDWARE GUIDE > Articles > Components > CPU > At The Last Second: AMD's Trump Card - The Athlon XP 2600+

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1:08 PM - 08/21/2002 by Frank Völkel

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With the launch of the Thoroughbred core in the "B" version, AMD Athlon reaches the fourth level in its evolution. The first core, the Thunderbird, was introduced about two years ago. AMD made a further step in October 2001 by introducing the Palomino core, which essentially consisted of the SSE command set expansion and an optimization of the cache line. The Thoroughbred core has been around since June 2002, and this one involves a rearrangement of the CPU's internal components, as well as smaller structures (0.13 micron). In order to give you a complete picture, we've included the data for the Barton core, which is expected to be out in Q3. The Barton represents the fifth and last level of development of the Athlon program, based on Socket 462.

Manufacturer	AMD	AMD	AMD	AMD	Intel
Processor	Athlon XP Thoroughbred "B" Core	Athlon XP Thoroughbred Core "A" Core	Athlon XP Palomino Core	Athlon Thunderbird Core	Pentium 4 Northwood Core
Introduction	Q3, 2002	Q2, 2002	October 9, 2001	October 9, 2001	January 7, 2002
Clock Frequencies	1.86 - 2.66 GHz	1.46 - 1.80 GHz	1.2 - 1.80 GHz	0.65 - 1.40 GHz	1.6 - 3.06 GHz
Manufacturing Process	0,13 µm	0,13 µm	0,18 µm	0,18 µm	0,13 µm
Die size	84 mm2	80 mm2	128 mm2	128 mm2	146 mm2
Number of Gates	37,5 Million	37,5 Million	37,5 Million	37,5 Million	55 Million
Platform	Socket462	Socket462	Socket462	Socket462	Socket478
CPU Bus Clock (Front Side Bus)	133 MHz 266 MHz DDR	133 MHz 266 MHz DDR	133 MHz 266 MHz DDR	100/133 MHz 200/266 MHz DDR	100/133 MHz 400/533 MHz QDR
L1 Execution Cache Size	64 kB	64 kB	64 kB	64 kB	12.000 µ-Ops (Trace Cache)
Execution Pre Decode?	no	no	no	no	yes
L1 Data Cache Size	64 kB	64 kB	64 kB	64 kB	8 kB (unconfirmed)
Hardware Data Prefetch	yes	yes	yes	yes	yes
L1 Cache Clock	core clock	core clock	core clock	core clock	core clock
L1 Data Cache Bus Width	64 bit	64 bit	64 bit	64 bit	256 bit
L2 Cache Size	256 kB	256 kB	256 kB	256 kB	512 kB
L2 Cache Clock	core clock	core clock	core clock	core clock	core clock
L2 Cache Addressable Range	64 GB	64 GB	64 GB	64 GB	64 GB
Processor Data Bus Width	64 bit	64 bit	64 bit	64 bit	64 bit
Platform Support
Chipsets	VIA KT333 to KT400 SiS 735 and SiS 745 Nvidia nForce, nForce 2 AMD 750 and 760	VIA KT133A to KT400 SiS 735 and SiS 745 ALi Magik 1 Nvidia nForce, nForce 2 AMD 750 and 760	VIA KT133 to KT400 SiS 735 and SiS 745 ALi Magik 1 Nvidia nForce, nForce 2 AMD 750 and 760	VIA KT133 to KT400 SiS 735 and SiS 745 ALi Magik 1 Nvidia nForce, nForce 2 AMD 750 and 760	Intel i845, Intel i845D, Intel i845E, i845G, i845EG, i845EP Intel i850 and Intel i850E VIA P4X266, VIA P4X266A VIA P4X333, VIA P4X400 SiS 645, SiS 645DX, SiS 648
Type of Memory	SDRAM DDR-SDRAM	SDRAM DDR-SDRAM	SDRAM DDR-SDRAM	SDRAM DDR-SDRAM	SDRAM DDR-SDRAM, RDRAM
Memory Clock	100/133/166/200 MHz	100/133/166/200 MHz	100/133/166 MHz	100/133/166 MHz	100/133/166/300/400/533 MHz
Instruction Extensions
MMX	yes	yes	yes	yes	yes
Enhanced 3DNow!	yes	yes	yes	yes	no
3DNow! Professional	yes	yes	yes	yes	no
SSE	yes	yes	yes	yes	yes
SSE2	no	no	no	no	yes
Electrical Specifications
SMP-Support	no ('not officially endorsed or supported')	no ('not officially endorsed or supported')	no ('not officially endorsed or supported')	no ('not officially endorsed or supported')	no
Core Voltage	1,65 Volt	1,65 Volt	1,75 Volt	1,75 Volt	1,5 Volt
Thermal Protection (Thermal Diode)	yes	yes	yes	yes	yes
Integrated Thermal Protection Logic	no, requires logic on motherboard	no, requires logic on motherboard	no, requires logic on motherboard	no, requires logic on motherboard	yes

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