Core details	Pentium Pro	Pentium Pro	Pentium Pro	Pentium Pro	Pentium Pro	Pentium Pro
Development name	P6	P6	P6	P6	P6	P6
Construction size (nm) 1	500 + 500	350 + 350	350 + 350	350 + 350	350 + 350	350 + 350
Transistor count (millions) 2	5.5 + 15.5	5.5 + 15.5	5.5 + 31	5.5 + 15.5	5.5 + 31	5.5 + 62
Number of processor cores	1	1	1	1	1	1
Registers - ALU (bits)	32	32	32	32	32	32
Registers - FPU (bits)	80	80	80	80	80	80
Connection Type	Socket 8	Socket 8	Socket 8	Socket 8	Socket 8	Socket 8
Model Details
Name / Core speed (MHz)	150	180	166	200	200	200
FSB Details
CLK speed (MHz)	60	60	66	66	66	66
Data transfer rate (MHz)	60	60	66	66	66	66
Total bus width (bits)	64	64	64	64	64	64
Maximum bandwidth (GB/sec)	0.48	0.48	0.53	0.53	0.53	0.53
Cache details
L1 amount (KiB)	16	16	16	16	16	16
L1 location	on-die	on-die	on-die	on-die	on-die	on-die
L1 instruction cache size (KiB)	8	8	8	8	8	8
L1 data cache size (KiB)	8	8	8	8	8	8
L2 amount (KiB)	256	256	512	256	512	1024
L2 location 3	CPU PCB	CPU PCB	CPU PCB	CPU PCB	CPU PCB	CPU PCB
L2 bus width (bits)	64	64	64	64	64	64
Extension support
MMX	No	No	No	No	No	No
3DNow!	No	No	No	No	No	No
SSE	No	No	No	No	No	No
Enhanced 3DNow!	No	No	No	No	No	No
3DNow! Professional	No	No	No	No	No	No
SSE2	No	No	No	No	No	No
SSE3	No	No	No	No	No	No
SSSE3	No	No	No	No	No	No
Additional Features
Intel 64	No	No	No	No	No	No
AMD64	No	No	No	No	No	No
HyperThreading	No	No	No	No	No	No
NX Bit	No	No	No	No	No	No
Virtualization Technology	No	No	No	No	No	No

Notes

1 - First figure is P6 core, second figure is L2 cache die

2 - First figure is P6 core, second figure is L2 cache die

3 - Each P6 and L2 cache chip are on the same PCB package; L2 cache runs at P6 core speed

© AMD & Intel CPU Specifications - N D Evanson 2008