Core details	Core 2 Duo	Core 2 Duo	Core 2 Duo	Core 2 Duo	Core 2 Duo	Core 2 Extreme	Core 2 Duo	Core 2 Duo
Development name	Allendale	Allendale	Conroe	Conroe	Conroe	Conroe XE	Wolfdale	Wolfdale
Construction size (nm)	65	65	65	65	65	65	45	45
Transistor count (millions)	167	167	291	291	291	291	~ 240?	410
Number of processor cores	2	2	2	2	2	2	2	2
Registers - ALU (bits)	64	64	64	64	64	64	64	64
Registers - FPU (bits)	80 (128 Ext)	80 (128 Ext)	80 (128 Ext)	80 (128 Ext)	80 (128 Ext)	80 (128 Ext)	80 (128 Ext)	80 (128 Ext)
Connection Type	LGA 775	LGA 775	LGA 775	LGA 775	LGA 775	LGA 775	LGA 775	LGA 775
Model Details
Name / Core speed (GHz)	E4300 / 1.8	E6300 / 1.87	E6300 / 1.87	E6320 / 1.87	E6540 / 2.33	X6800 / 2.93	E7200 / 2.53	E8190 / 2.67
	E4400 / 2.0	E6400 / 2.13	E6400 / 2.13	E6420 / 2.13	E6550 / 2.33			E8200 / 2.67
	E4500 / 2.2			E6600 / 2.40	E6750 / 2.67			E8300 / 2.83
	E4600 / 2.4			E6700 / 2.67	E6850 / 3.00			E8400 / 3.00
	E4700 / 2.6							E8500 / 3.17
FSB Details
CLK speed (MHz)	200	266	266	266	333	266	266	333
Data transfer rate (MHz)	800	1066	1066	1066	1333	1066	1066	1333
Total bus width (bits)	64	64	64	64	64	64	64	64
Maximum bandwidth (GB/sec)	6.40	8.53	8.53	8.53	10.67	8.53	8.53	10.67
Cache details
L1 amount (KiB)	64 x 2	64 x 2	64 x 2	64 x 2	64 x 2	64 x 2	64 x 2	64 x 2
L1 location	on-die	on-die	on-die	on-die	on-die	on-die	on-die	on-die
L1 instruction cache size (KiB)	32 x 2	32 x 2	32 x 2	32 x 2	32 x 2	32 x 2	32 x 2	32 x 2
L1 data cache size (KiB)	32 x 2	32 x 2	32 x 2	32 x 2	32 x 2	32 x 2	32 x 2	32 x 2
L2 amount (KiB)	2048	2048	2048	4096	4096	4096	3072	6144
L2 location	on-die	on-die	on-die	on-die	on-die	on-die	on-die	on-die
L2 bus width (bits)	256	256	256	256	256	256	256	256
Extension support
MMX	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
3DNow!	No	No	No	No	No	No	No	No
SSE	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Enhanced 3DNow!	No	No	No	No	No	No	No	No
3DNow! Professional	No	No	No	No	No	No	No	No
SSE2	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
SSE3	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
SSSE3	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
SSE4	No	No	No	No	No	No	Yes (4.1)	Yes (4.1)
Additional Features
Intel 64	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
AMD64	No	No	No	No	No	No	No	No
HyperThreading	No	No	No	No	No	No	No	No
NX Bit	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Virtualization Technology	No 1	Yes	Yes	Yes	Yes 2	Yes	Yes	Yes 3

Notes

1 - Allendale E4x00 models do not support VT but the E6x00 do

2 - E6540 model does not support VT

3 - E8190 model does not support VT

© AMD & Intel CPU Specifications - N D Evanson 2008