Core details	Pentium	Pentium	Pentium	Pentium	Pentium	Pentium	Pentium	Pentium MMX
Development name	P5	P5	P54C	P54C	P54C	P54CS	P54CS	P55C
Construction size (nm)	800	800	600	600	600	350	350	280
Transistor count (millions)	3.2	3.2	3.2	3.2	3.2	3.3	3.3	4.5
Number of processor cores	1	1	1	1	1	1	1	1
Registers - ALU (bits)	32	32	32	32	32	32	32	32
Registers - FPU (bits)	80	80	80	80	80	80	80	80 (64 Ext)
Connection Type	Socket 4	Socket 4	Socket 5 / 7	Socket 5 / 7	Socket 5 / 7	Socket 7	Socket 7	Socket 7
Model Details
Name / Core speed (MHz)	60	66	75	90	100	150	133	166
				120			166	200
							200	233
FSB Details
CLK speed (MHz)	60	66	50	60	66	60	66	66
Data transfer rate (MHz)	60	66	50	60	66	60	66	66
Total bus width (bits)	64	64	64	64	64	64	64	64
Maximum bandwidth (GB/sec)	0.48	0.53	0.40	0.48	0.53	0.48	0.53	0.48
Cache details
L1 amount (KiB)	16	16	16	16	16	16	16	32
L1 location	on-die	on-die	on-die	on-die	on-die	on-die	on-die	on-die
L1 instruction cache size (KiB)	8	8	8	8	8	8	8	16
L1 data cache size (KiB)	8	8	8	8	8	8	8	16
L2 amount (KiB)	-	-	-	-	-	-	-	-
L2 location	external	external	external	external	external	external	external	external
L2 bus width (bits)	-	-	-	-	-	-	-	-
Extension support
MMX	No	No	No	No	No	No	No	Yes
3DNow!	No	No	No	No	No	No	No	No
SSE	No	No	No	No	No	No	No	No
Enhanced 3DNow!	No	No	No	No	No	No	No	No
3DNow! Professional	No	No	No	No	No	No	No	No
SSE2	No	No	No	No	No	No	No	No
SSE3	No	No	No	No	No	No	No	No
SSSE3	No	No	No	No	No	No	No	No
Additional Features
Intel 64	No	No	No	No	No	No	No	No
AMD64	No	No	No	No	No	No	No	No
HyperThreading	No	No	No	No	No	No	No	No
Execute Disable Bit	No	No	No	No	No	No	No	No
Virtualization Technology	No	No	No	No	No	No	No	No

Core details	Pentium MMX
Development name	Tillamook
Construction size (nm)	250
Transistor count (millions)	4.5
Number of processor cores	1
Registers - ALU (bits)	32
Registers - FPU (bits)	80 (64 Ext)
Connection Type	Socket 7
Model Details
Name / Core speed (MHz)	200
	233
	266
	300
FSB Details
CLK speed (MHz)	66
Data transfer rate (MHz)	66
Total bus width (bits)	64
Maximum bandwidth (GB/sec)	0.53
Cache details
L1 amount (KiB)	32
L1 location	on-die
L1 instruction cache size (KiB)	16
L1 data cache size (KiB)	16
L2 amount (KiB)	-
L2 location	external
L2 bus width (bits)	-
Extension support
MMX	Yes
3DNow!	No
SSE	No
Enhanced 3DNow!	No
3DNow! Professional	No
SSE2	No
SSE3	No
SSSE3	No
Additional Features
Intel 64	No
AMD64	No
HyperThreading	No
NX Bit	No
Virtualization Technology	No

Notes

© AMD & Intel CPU Specifications - N D Evanson 2008