Intel Core 2

Lore & Background

The Core 2 family was introduced on July 27, 2006, with the Duo (dual-core) and Extreme (dual- or quad-core for enthusiasts) sub-brands, followed in 2007 by the Quad (quad-core) and Solo (single-core) sub-brands. The single- and dual-core models are single-die, while quad-core models comprise two dies, each containing two cores, packaged in a multi-chip module. From December 2006, all Core 2 processors were manufactured from 300-millimeter plates at Fab 12 in Arizona and Fab 24-2 in County Kildare, Ireland.

The Core 2-branded CPUs include Conroe/Allendale (dual-core desktops), Merom (dual-core laptops), Merom-L (single-core laptops), Kentsfield (quad-core desktops), and updated variants Wolfdale (dual-core desktops), Penryn (dual-core laptops), Penryn-QC (quad-core laptops), and Yorkfield (quad-core desktops). The Core 2 Duo Conroe has a maximum TDP of 65 W, half the power of the less capable contemporary Pentium D-branded desktop chips with a max TDP of 130 W. The Merom microarchitecture introduced SSSE3, Trusted Execution Technology, Enhanced SpeedStep, and Active Management Technology 2.0; the Penryn microarchitecture introduced SSE4.1.

Reader's Guide

The Core 2 line marked a significant shift in Intel's branding, relegating the Pentium brand to the mid-range market and reunifying laptop and desktop CPU lines under the same product name. It was the last flagship range of Intel desktop processors to use a front-side bus (FSB). The family's successors are the Nehalem-based Core i3, i5, and i7, with the Core i7 officially launched on November 17, 2008. The last Core 2 processor released was the Core 2 Quad Q9500 in January 2010; the line was removed from official price lists in July 2011 and discontinued in June 2012.

As of 2025, some Linux distributions (e.g., Red Hat Enterprise Linux 9, openSUSE Tumbleweed) will not run on Core 2 CPUs because they require the x86-64-v2 microarchitecture level, which is not fully supported by any Core 2-series CPU. Windows IoT Enterprise releases starting with Windows 11, version 24H2, also will not run on Core 2 CPUs as they require SSE4.2 and POPCNT instruction sets, neither of which Core 2 supports. Core 2 processors support virtualization if the VM software supports VT-x, but newer VM software versions do not support processors older than Nehalem due to lack of VT-x with Extended Page Tables (SLAT).

Did You Know?

• The Core 2 Duo Conroe dissipates half the power (65 W TDP) of the less capable contemporary Pentium D desktop chips (130 W TDP).
• The Core 2 line was the last flagship Intel desktop processor range to use a front-side bus (FSB).