Core details	Athlon XP	Athlon XP	Athlon XP	Athlon XP	Athlon XP	Athlon XP	Athlon XP
Development name	Palomino	Thoroughbred A	Thoroughbred B	Thoroughbred B	Thorton	Thorton	Thorton
Construction size (nm)	180	130	130	130	130	130	130
Transistor count (millions)	37.5	37.6	37.6	37.6	37.6	37.6	37.6
Number of processor cores	1	1	1	1	1	1	1
Registers - ALU (bits)	32	32	32	32	32	32	32
Registers - FPU (bits)	80 (128 Ext)	80 (128 Ext)	80 (128 Ext)	80 (128 Ext)	80 (128 Ext)	80 (128 Ext)	80 (128 Ext)
Connection Type	Socket A	Socket A	Socket A	Socket A	Socket A	Socket A	Socket A
Model Details
Name / Core speed (GHz)	1500+ / 1.33	1700+ / 1.47	1600+ / 1.40	2600+ / 2.08	2000+ / 1.67	2600+ / 2.08	3100+ / 2.20
	1600+ / 1.40	1800+ / 1.53	1700+ / 1.47	2700+ / 2.17	2200+ / 1.80
	1700+ / 1.47	2000+ / 1.67	1800+ / 1.53	2800+ / 2.25	2400+ / 2.00
	1800+ / 1.53	2100+ / 1.73	1900+ / 1.60		2600+ / 2.13
	1900+ / 1.60	2200+ / 1.80	2000+ / 1.67
	2000+ / 1.67		2100+ / 1.73
	2100+ / 1.73		2200+ / 1.80
			2400+ / 2.00
			2600+ / 2.13
FSB Details
CLK speed (MHz)	133	133	133	166	133	166	200
Data transfer rate (MHz)	266	266	266	333	266	333	400
Total bus width (bits)	64	64	64	64	64	64	64
Maximum bandwidth (GB/sec)	2.13	2.13	2.13	2.67	2.13	2.67	3.20
Cache details
L1 amount (KiB)	128	128	128	128	128	128	128
L1 location	on-die	on-die	on-die	on-die	on-die	on-die	on-die
L1 instruction cache size (KiB)	64	64	64	64	64	64	64
L1 data cache size (KiB)	64	64	64	64	64	64	64
L2 amount (KiB)	256	256	256	256	256	256	256
L2 location	on-die	on-die	on-die	on-die	on-die	on-die	on-die
L2 bus width (bits)	64	64	64	64	64	64	64
Extension support
MMX	Yes	Yes	Yes	Yes	Yes	Yes	Yes
3DNow!	Yes	Yes	Yes	Yes	Yes	Yes	Yes
SSE	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Enhanced 3DNow!	Yes	Yes	Yes	Yes	Yes	Yes	Yes
3DNow! Professional	Yes	Yes	Yes	Yes	Yes	Yes	Yes
SSE2	No	No	No	No	No	No	No
SSE3	No	No	No	No	No	No	No
SSSE3	No	No	No	No	No	No	No
Additional Features
Intel 64	No	No	No	No	No	No	No
AMD64	No	No	No	No	No	No	No
HyperThreading	No	No	No	No	No	No	No
NX Bit	No	No	No	No	No	No	No
Virtualization Technology	No	No	No	No	No	No	No

Core details	Athlon XP	Athlon XP	Athlon XP
Development name	Barton	Barton	Barton
Construction size (nm)	130	130	130
Transistor count (millions)	54	54	54
Number of processor cores	1	1	1
Registers - ALU (bits)	32	32	32
Registers - FPU (bits)	80 (128 Ext)	80 (128 Ext)	80 (128 Ext)
Connection Type	Socket A	Socket A	Socket A
Model Details
Name / Core speed (GHz)	2500+ / 1.87	2500+ / 1.83	2600+ / 1.90
	2600+ / 2.00	2600+ / 1.92	3000+ / 2.10
	2800+ / 2.13	2800+ / 2.08	3200+ / 2.20
		3000+ / 2.18
FSB Details
CLK speed (MHz)	133	166	200
Data transfer rate (MHz)	266	333	400
Total bus width (bits)	64	64	64
Maximum bandwidth (GB/sec)	2.13	2.67	3.20
Cache details
L1 amount (KiB)	128	128	128
L1 location	on-die	on-die	on-die
L1 instruction cache size (KiB)	64	64	64
L2 data cache size (KiB)	64	64	64
L2 amount (KiB)	512	512	512
L2 location	on-die	on-die	on-die
L2 bus width (bits)	64	64	64
Extension support
MMX	Yes	Yes	Yes
3DNow!	Yes	Yes	Yes
SSE	Yes	Yes	Yes
Enhanced 3DNow!	Yes	Yes	Yes
3DNow! Professional	Yes	Yes	Yes
SSE2	No	No	No
SSE3	No	No	No
SSSE3	No	No	No
Additional Features
Intel 64	No	No	No
AMD64	No	No	No
HyperThreading	No	No	No
NX Bit	No	No	No
Virtualization Technology	No