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Wednesday, October 18, 2006
Intel Core 2 Duo

2. Core 2 Duo Line

- Conroe

The first Intel Core 2 Duo processor cores, code-named Conroe, are built on a 65 nm process and are intended for replacing Pentium 4 and Pentium D series. Intel claims that the Conroe series provides 40% more performance at 40% less power, compared to the Pentium D. The Conroe processors are labeled as the E6600 and E6700 Core 2 Duo models, with the E6600 clocked at 2.4 GHz and the E6700 clocked at 2.67 GHz. The family has a 1066 MT/s front side bus, 4 MB shared L2 cache, and 65 watts TDP. The E6600 and E6700 have 4MB L2 cache, while the E6300 and E6400 versions have 2MB L2 cache.

- Conroe XE

This is currently, the top-of-the-line for Intel's CPU product line. It replaces the Pentium 4 Extreme Edition and the dual-core Pentium Extreme Edition processors. Core 2 Extreme has a clock speed of 2.93 GHz and a 1066 MT/s FSB. The TDP for this family is 75-80 watts. According to Intel, at full load the XE6800 does not exceed 45 °C (113 °F), and with SpeedStep enabled, the average temperature of the CPU when idle is 25 °C.

Like the desktop Core 2 Duo, it has 4 MB of shared L2 cache available. This means that the only major difference between the regular Core 2 Duo and Core 2 Extreme is the clock speed. The good thing is that it comes with an unlocked multiplier, allowing good overclocking abilities and of course, underclocking to reduce overall temperature.

- Allendale

Allendale is a codename for the stripped down versions of the Conroe processors with only 2 MB of L2 cache. The E6300 (1.86 GHz) and E6400 (2.13 GHz), both have a 1066MT/s FSB.

Below you will find a table with all the Core2Duo CPU line and its main specs:

Intel Core2 Duo Processor XE6800
Intel Core2 Duo Processor E6700
Intel Core2 Duo Processor E6600
Intel Core2 Duo Processor E6400
Intel Core2 Duo Processor E6300
Processor Number
65 nanometer technology
L2 Cache
L3 Cache
Clock Speed
2.93 GHz
2.66 GHz
2.40 GHz
2.13 GHz
1.86 GHz
Front Side Bus Speed
1066 MHz
Other Intel Technologies
Intel EM64, VTΒ, Execute Disable BitΒ, dual-core, EIST
Thermal Design
Intel 975X
Intel P965
Intel 975X
Intel P965
Intel 946PL
Intel 946GZ
Intel Q965
Intel Q963
Intel G965
Slot/Socket Type
Pin Count
sSpec Number

- Compatibility

As the above table shows, all Core2Duo series are the Socket LGA775. However, not every motherboard is compatible. Supporting chipsets besides Intel's (975X, P/G/Q965, Q963, 946GZ/PL) are:

  • ATI's Radeon Xpress 200, RD600 and RS600
  • NVidia's nForce 4 SLI Intel Edition and nForce 570/590 Intel Edition
  • VIA's PT880/PT880 Ultra, PT890, PM880 and PM890.

Keep in mind that older motherboards may not support the Conroe due to the fact that it requires a newer voltage regulator module (VRM), the VRM 11.

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