Intel has finally launched a successor for Pentium 4. Its name is Core 2 Duo and it is the first desktop CPU to use the new Core microarchitecture. In this tutorial we will list all Core 2 Duo, Core 2 Quad and Core 2 Extreme models released so far and will talk about their main features.

Core 2 Duo processor (codenamed Conroe) starts a new CPU generation from Intel based on the new Core microarchitecture (as Core 2 Duo is the first desktop processor to use this microarchitecture) and declares the end of Netburst microarchitecture used by Intel’s 7th generation processors, which is around since 2000. As Core microarchitecture is based on the same architecture used by Pentium M and Pentium III, we can say that Core 2 Duo is a 6th generation Intel CPU. Besides Core 2 Duo, Core 2 Quad, Core 2 Extreme and Xeon series 5100 (codenamed Woodcrest) use this new microarchitecture.

Core 2 family comes in three flavors: Core 2 Duo, which replaces Pentium 4 and Pentium D, Core 2 Quad, which is a quad-core Core 2 Duo, and Core 2 Extreme, which replaces Pentium Extreme Edition. The difference between Core 2 Duo and Core 2 Extreme is that the last one runs at higher clock rates and has its clock multiplier unlocked, which allows you to overclock the CPU by changing the CPU clock multiplier. Some Core 2 Extreme models have four CPU cores, as you will see on the next page.
 
Pay attention to not confuse Core 2 Duo with Core Duo. Core Duo is the commercial name for a Pentium M manufactured using 65 nm process, codenamed Yonah, while Core 2 Duo is the commercial name for the CPU codenamed Merom (for laptops) or Conroe (for desktops), which uses the new Intel Core microarchitecture. For an in-depth discussion on this new microarchitecture, read our Inside Intel Core Microarchitecture tutorial.

Here is a summary of the main Core 2 family features:

sSpec	Model	Internal Clock	External Clock	L2 Cache	Transistor Count	Die Size	TDP	Max. Temp. (º C)	Voltage
SLA9U	E6850	3 GHz	1,333 MHz	4 MB	291 million	143 mm2	65 W	72	0.962V-1.35V
SLA9V	E6750	2.66 GHz	1,333 MHz	4 MB	291 million	143 mm2	65 W	72	0.962V-1.35V
SL9ZF	E6700	2.66 GHz	1,066 MHz	4 MB	291 million	143 mm2	65 W	60.1	-
SL9S7	E6700	2.66 GHz	1,066 MHz	4 MB	291 million	143 mm2	65 W	60.1	0.85V-1.35V
SL9ZL	E6600	2.40 GHz	1,066 MHz	4 MB	291 million	143 mm2	65 W	60.1	1.18V-1.32V
SL9S8	E6600	2.40 GHz	1,066 MHz	4 MB	291 million	143 mm2	65 W	60.1	0.85V-1.35V
SLA9X	E6550	2.33 GHz	1,333 MHz	4 MB	291 million	143 mm2	65 W	72	0.962V-1.35V
SLAAX	E6540	2.33 GHz	1,333 MHz	4 MB	291 million	143 mm2	65 W	72	0.962V-1.35V
SL94T	E6420	2.13 GHz	1,066 MHz	4 MB	291 million	143 mm2	65 W	60.1	-
SL9T9	E6400	2.13 GHz	1,066 MHz	2 MB	167 million	111 mm2	65 W	61.4	1.22V-1.32V
SL9S9	E6400	2.13 GHz	1,066 MHz	2 MB	167 million	111 mm2	65 W	61.4	0.85V-1.35V
SLA4U	E6320	1.86 GHz	1,066 MHz	4 MB	291 million	143 mm2	65 W	60.1	-
SL9TA	E6300	1.86 GHz	1,066 MHz	2 MB	167 million	111 mm2	65 W	61.4	1.22V-1.32V
SL9SA	E6300	1.86 GHz	1,066 MHz	2 MB	167 million	111 mm2	65 W	61.4	0.85V-1.35V
SLA95	E4500	2.20 GHz	800 MHz	2 MB	167 million	111 mm2	65 W	73.3	0.962V-1.35V
SL93F	E4400	2 GHz	800 MHz	2 MB	167 million	111 mm2	65 W	61.4	1.16V-1.31V
SLA98	E4400	2 GHz	800 MHz	2 MB	167 million	111 mm2	65 W	73.3	1.16V-1.31V
SL9TB	E4300	1.8 GHz	800 MHz	2 MB	167 million	111 mm2	65 W	61.4	0.85V-1.35V

 

sSpec	Model	Internal Clock	External Clock	L2 Cache	Transistor Count	Die Size	TDP	Max. Temp. (º C)	Voltage	Core
SLACQ	Q6700	2.66 GHz	1,066 MHz	8 MB	-	-	95	71	1.10V-1.37V	4
SL9UM	Q6600	2.4 GHz	1,066 MHz	8 MB	-	-	105 W	62,2	1.10V-1.37V	4
SL9UM	Q6600	2.4 GHz	1,066 MHz	8 MB	-	-	105 W	62,2	1.10V-1.37V	4

 

sSpec	Model	Internal Clock	External Clock	L2 Cache	Transistor Count	Die Size	TDP	Max. Temp. (º C)	Voltage	Core
SLAFN	QX6850	3 GHz	1,333 MHz	8 MB	-	-	130 W	64.5	1.10V-1.37V	4
SL9UK	QX6800	2.93 GHz	1,066 MHz	8 MB	-	-	130 W	64.5	1.10V-1.37V	4
SL9S5	X6800	2.93 GHz	1,066 MHz	4 MB	-	-	75 W	60.4	0.85V-1.35V	2
SLACP	QX6800	2.93 GHz	1,066 MHz	8 MB	-	-	130 W	64.5	1.10V-1.37V	4
SLA33	X7900	2.80 GHz	800 MHz	4 MB	-	-	44 W	100	-	2
SLAF4	X7900	2.80 GHz	800 MHz	4 MB	-	-	44 W	100	1.125V-1.325V	2
SL9UL	QX6700	2.66 GHz	1,066 MHz	8 MB	-	-	130 W	65	1.10V-1.37V	4
SLA6Z	X7800	2.60 GHz	800 MHz	4 MB	-	-	44 W	100	-	2