Core details	80286	80386 DX	80386 SX	80486 DX	80486 SX	80486 DX2	80486 SX2	80486 DX4
Development name	-	-	-	-	-	-	-	-
Construction size (nm)	1500	1500~1000	1500~1000	1000	1000	800	800	800
Transistor count (millions)	0.134	0.275	0.275	1.2	1.2	1.2	< 1.2	1.2
Number of processor cores	1	1	1	1	1	1	1	1
Registers - ALU (bits)	16	32	32	32	32	32	32	32
Registers - FPU (bits)	external	external	external	80	-	80	-	80
Connection Type	68 pin PLCC	132 pin PGA	100 pin PGFP	Socket 1 ~ 3	Socket 1 ~ 3	Socket 1 ~ 3	Socket 1 ~ 3	Socket 1 ~ 3
Model Details
Name / Core speed (MHz)	6 ~ 25	16 ~ 33	16 ~ 33	16 ~ 50	16 ~ 33	32 ~ 66	32 ~ 66	48 ~ 100
FSB Details
CLK speed (MHz)	6 ~ 25	16 ~ 33	16 ~ 33	16 ~ 50	16 ~ 33	16 ~ 33	16 ~ 33	16 ~ 33
Data transfer rate (MHz)	6 ~ 25	16 ~ 33	16 ~ 33	16 ~ 50	16 ~ 33	16 ~ 33	16 ~ 33	16 ~ 33
Total data bus width (bits)	16	32	16	32	32	32	32	32
Max data bandwidth (MB/sec)	50	132	66
Cache details
L1 amount (KiB)	-	-	-	8	8	8	8	8
L1 location	-	external	external	on-die	on-die	on-die	on-die	on-die
L1 instruction cache size (KiB)	-	-	-	-	-	-	-	-
L1 data cache size (KiB)	-	-	-	-	-	-	-	-
Extension support
MMX	No	No	No	No	No	No	No	No
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
NX Bit	No	No	No	No	No	No	No	No
Virtualization Technology	No	No	No	No	No	No	No	No

Notes

© AMD & Intel CPU Specifications - N D Evanson 2008