Core details	Pentium III	Pentium III	Pentium III	Pentium III	Pentium III	Pentium III	Pentium III
Development name	Katmai	Katmai	Coppermine	Coppermine	Coppermine	Coppermine	Coppermine-T
Construction size (nm)	250	250	180	180	180	180	180
Transistor count (millions)	9.5 1	9.5 1	28.1	28.1	28.1	28.1	28.1
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	Slot 1	Slot 1	Slot 1	Slot 1	Socket 370	Socket 370	Socket 370
Model Details
Name / Core speed (MHz)	450	533 (B)	550 (E)	533 (EB)	500 (E)	533 (EB)	866
	500	600 (B)	600 (E)	600 (EB)	550 (E)	600 (EB)	933
	550		700	667 (B)	600 (E)	667 (B)	1000
	600		750	733 (B)	650	733 (B)	1133
			800	800 (B)	700	800 (B)
			850	866 (B)	750	866 (B)
			900	933 (B)	800	933 (B)
			950	1000 (B)	850	1000 (B)
			1000	1133 (B)	900	1133 (B)
					950
					1000
					1100
FSB Details
CLK speed (MHz)	100	133	100	133	100	133	133
Data transfer rate (MHz)	100	133	100	133	100	133	133
Total bus width (bits)	64	64	64	64	64	64	64
Maximum bandwidth (GB/sec)	0.80	1.07	0.80	1.07	0.80	1.07	1.07
Cache details
L1 amount (KiB)	32	32	32	32	32	32	32
L1 location	on-die	on-die	on-die	on-die	on-die	on-die	on-die
L1 instruction cache size (KiB)	16	16	16	16	16	16	16
L2 data cache size (KiB)	16	16	16	16	16	16	16
L2 amount (KiB)	512	512	256	256	256	256	256
L2 location	CPU PCB 2	CPU PCB 2	on-die	on-die	on-die	on-die	on-die
L2 bus width (bits)	64	64	256	256	256	256	256
Extension support
MMX	Yes	Yes	Yes	Yes	Yes	Yes	Yes
3DNow!	No	No	No	No	No	No	No
SSE	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Enhanced 3DNow!	No	No	No	No	No	No	No
3DNow! Professional	No	No	No	No	No	No	No
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	Pentium III	Pentium III
Development name	Tualatin	Tualatin
Construction size (nm)	180	180
Transistor count (millions)	44	44
Number of processor cores	1	1
Registers - ALU (bits)	32	32
Registers - FPU (bits)	80 (128 Ext)	80 (128 Ext)
Connection Type	Socket 370	Socket 370
Model Details
Name / Core speed (MHz)	1000	1133 (S)
	1133	1266 (S)
	1200	1400 (S)
	1333
	1400
FSB Details
CLK speed (MHz)	133	133
Data transfer rate (MHz)	133	133
Total bus width (bits)	64	64
Maximum bandwidth (GB/sec)	1.07	1.07
Cache details
L1 amount (KiB)	32	32
L1 location	on-die	on-die
L1 instruction cache size (KiB)	16	16
L2 data cache size (KiB)	16	16
L2 amount (KiB)	256	512
L2 location	on-die	on-die
L2 bus width (bits)	256	256
Extension support
MMX	Yes	Yes
3DNow!	No	No
SSE	Yes	Yes
Enhanced 3DNow!	No	No
3DNow! Professional	No	No
SSE2	No	No
SSE3	No	No
SSSE3	No	No
Additional Features
Intel 64	No	No
AMD64	No	No
HyperThreading	No	No
NX Bit	No	No
Virtualization Technology	No	No

Notes

1 - Figure does not include off-die L2 cache chips

2 - L2 cache runs at 50% CPU core speed

© AMD & Intel CPU Specifications - N D Evanson 2008