Intel Core 2

From Wikipedia, the free encyclopedia

Core 2

Produced	From 2006 to present
Common manufacturer(s)	Intel
Max. CPU clock rate	1.06 GHz to 3.33 GHz
FSB speeds	533 MHz to 1600 MHz
Min. feature size	65 nm to 45 nm
Instruction set	x86, x86 64, (SSE4.1 is for 45 nm processors only)
Microarchitecture	Intel Core
Cores	1, 2, or 4 (2x2)
Socket(s)	Socket T (LGA 775) Socket M (µPGA 478) Socket P (µPGA 478) Micro-FCBGA (µBGA 479) Micro-FCBGA (µBGA 965)
Core name(s)	Allendale, Conroe, Conroe-L, Merom-2M, Merom, Merom-L, Kentsfield, Wolfdale, Yorkfield, Penryn

Core 2 is a brand encompassing a range of Intel's consumer 64-bit x86-64 single-, dual-, and quad-core CPUs based on the Intel Core microarchitecture. The single- and dual-core models are single-die, whereas the quad-core models comprise two dies, each containing two cores, packaged in a multi-chip module.^[1] The introduction of Core 2 relegated the Pentium brand to the mid-range market, and reunified laptop and desktop CPU lines, which previously had been divided into the Pentium 4, Pentium D, and Pentium M brands.

The Core microarchitecture returned to lower clock rates and improved the usage of both available clock cycles and power when compared with the preceding NetBurst microarchitecture of the Pentium 4/D-branded CPUs.^[2] The Core microarchitecture provides more efficient decoding stages, execution units, caches, and buses, reducing the power consumption of Core 2-branded CPUs while increasing their processing capacity. Intel's CPUs have varied wildly in power consumption according to clock rate, architecture, and semiconductor process, shown in the CPU power dissipation tables.

Core-based processors do not have Hyper-Threading Technology found in Pentium 4 processors. This is because the Core microarchitecture is a descendant of the P6 microarchitecture used by Pentium Pro, Pentium II, Pentium III, and Pentium M. Core 2 also lacks an L3 Cache found in the Gallatin core of the Pentium 4 Extreme Edition, although an L3 Cache is present in high-end versions of Core-based Xeons and Hyper-Threading is present on select Atom processors. Both an L3 cache and Hyper-threading is present in current Nehalem and future Westmere processors.

The Core 2 brand was introduced on July 27, 2006,^[3] comprising the Solo (single-core), Duo (dual-core), Quad (quad-core), and in 2007, the Extreme (dual- or quad-core CPUs for enthusiasts) version.^[4] Intel Core 2 processors with vPro technology (designed for businesses) include the dual-core and quad-core branches.^[5]

Contents 1 Duo, Quad, and Extreme 2 Processor cores 2.1 Conroe / Merom (65 nm) 2.2 Conroe-L / Merom-L 2.2.1 Merom-L 2.3 Penryn / Wolfdale (45 nm) 2.4 Dunnington 3 Successors 4 Pricing 5 Nomenclature and abbreviations 6 See also 7 References 8 External links 8.1 News reports on the Core 2 product launch 8.2 Reviews

[edit] Duo, Quad, and Extreme

The Core 2-branded CPUs include: "Conroe"/"Allendale" (dual-core for desktops), "Merom" (dual-core for laptops), "Merom-L" (single-core for laptops), "Kentsfield" (quad-core for desktops), and the updated variants named "Wolfdale" (dual-core for desktops), "Penryn" (dual-core for laptops), and "Yorkfield" (quad-core for desktops). (Note: For the server and workstation "Woodcrest", "Tigerton", "Harpertown" and "Dunnington" CPUs see the Xeon brand^[6].)

The Core 2 branded processors featured the Virtualization Technology (with some exceptions), Execute Disable Bit, and SSE3. Their Core microarchitecture introduced also SSSE3, Trusted Execution Technology, Enhanced SpeedStep, and Active Management Technology (iAMT2). With a thermal design power (TDP) of up to only 65 W, the Core 2 dual-core Conroe consumed only half the power of less capable, but also dual-core Pentium D-branded desktop chips^[7] with a TDP of up to 130 W^[8] (a high TDP requires additional cooling that can be noisy and expensive).

Intel Core 2 processor family
Original logo *	New logo	Desktop			Laptop
		Code-named	Core	Date released	Code-named	Core	Date released
		Conroe Allendale Wolfdale	dual (65 nm) dual (65 nm) dual (45 nm)	Aug 2006 Jan 2007 Jan 2008	Merom Penryn	dual (65 nm) dual (45 nm)	Jul 2006 Jan 2008
		Conroe XE Kentsfield XE Yorkfield XE	dual (65 nm) quad (65 nm) quad (45 nm)	Jul 2006 Nov 2006 Nov 2007	Merom XE Penryn XE Penryn XE	dual (65 nm) dual (45 nm) quad (45 nm)	Jul 2007 Jan 2008 Aug 2008
		Kentsfield Yorkfield	quad (65 nm) quad (45 nm)	Jan 2007 Mar 2008	Penryn	quad (45 nm)	Aug 2008
		Desktop version not available			Merom-L Penryn-3M	Single (65 nm) Single (45 nm)	Sep 2007 May 2008
* Sort by initial date released List of Intel Core 2 microprocessors

[edit] Processor cores

[edit] Conroe / Merom (65 nm)

The original Core 2 processors are based around the same dies that can be identified as CPUID Family 6 Model 15. Depending on their configuration and packaging, their code names are Conroe (LGA 775, 4 MB L2 cache), Allendale (LGA 775, 2 MB L2 cache), Merom (Socket M, 4 MB L2 cache) and Kentsfield (Multi-chip module, LGA 775, 2x4MB L2 cache). Merom and Allendale processors with limited features can be found in Pentium Dual Core and Celeron processors, while Conroe, Allendale and Kentsfield also are sold as Xeon processors.

Additional code names for processors based on this model are Woodcrest (LGA 771, 4 MB L2 cache), Clovertown (MCM, LGA 771, 2x4MB L2 cache) and Tigerton (MCM, Socket 604, 2x4MB L2 cache), all of which are marketed only under the Xeon brand.

Codename (main article)	Brand name (list)	L2 Cache	Socket	TDP
Merom	Mobile Core 2 Duo U7xxx	2 MB	BGA479	10 W
	Mobile Core 2 Duo L7xxx	4 MB		17 W
	Mobile Core 2 Duo T5xxx	2 MB	Socket M Socket P BGA479	35 W
	Mobile Core 2 Duo T7xxx	2-4 MB
	Mobile Core 2 Extreme X7xxx	4 MB		44 W
Conroe and Allendale	Core 2 Duo E4xxx	2 MB	LGA 775	65 W
	Core 2 Duo E6xxx	2-4 MB
	Core 2 Extreme X6xxx	4MB
Kentsfield	Core 2 Quad Q6xxx	2x4 MB		95-105 W
	Core 2 Extreme QX6xxx			130 W

[edit] Conroe-L / Merom-L

The Conroe-L and Merom-L processors are based around the same core as Conroe and Merom, but only contain a single core and 1 MB of L2 cache, significantly reducing production cost and power consumption of the processor at the expense of performance compared to the dual-core version. It is used only in ultra-low voltage Core 2 Solo U2xxx and in Celeron processors and is identified as CPUID family 6 model 22.

[edit] Merom-L

Codename (main article)	Brand name (list)	L2 Cache	Socket	TDP
Merom	Core 2 Solo U2xxx	1 MB	FCBGA	5.5 W

[edit] Penryn / Wolfdale (45 nm)

In Intel's Tick-Tock cycle, the 2007/2008 "Tick" was the shrink of the Core microarchitecture to 45 nanometers as CPUID model 23. In Core 2 processors, it is used with the code names Penryn (Socket P), Wolfdale (LGA 775) and Yorkfield (MCM, LGA 775), some of which are also sold as Celeron, Pentium and Xeon processors. In the Xeon brand, the Wolfdale-DP and Harpertown code names are used for LGA 771 based MCMs with two or four active Wolfdale cores.

The chips come in two sizes, with 6 MB and 3 MB L2 cache. The smaller version is commonly called Penryn-3M and Wolfdale-3M as well as Yorkfield-6M, respectively. The single-core version of Penryn, listed as Penryn-L here, is not a separate model like Merom-L but a version of the Penryn-3M model with only one active core.

Codename (main article)	Brand name (list)	L2 Cache	Socket	TDP
Penryn-L	Mobile Core 2 Solo SU3xxx	3 MB	BGA956	5.5 W
Penryn	Mobile Core 2 Duo SU7xxx	3 MB		10W
	Mobile Core 2 Duo SU9xxx
	Mobile Core 2 Duo SL9xxx	6 MB		17 W
	Mobile Core 2 Duo SP9xxx			25 W
	Mobile Core 2 Duo P7xxx	3 MB	Socket P FCBGA6	25 W
	Mobile Core 2 Duo P8xxx
	Mobile Core 2 Duo P9xxx	6 MB
	Mobile Core 2 Duo T6xxx	2 MB		35 W
	Mobile Core 2 Duo T8xxx	3 MB
	Mobile Core 2 Duo T9xxx	6 MB
	Mobile Core 2 Extreme X9xxx		Socket P	44 W
	Mobile Core 2 Duo E8xxx	6 MB		35-55 W
Penryn-QC	Mobile Core 2 Quad Q9xxx	6-12 MB	Socket P	45 W
	Mobile Core 2 Extreme QX9xxx	12 MB
Wolfdale	Core 2 Duo E7xxx	3 MB	LGA 775	65 W
	Core 2 Duo E8xxx	6 MB
Yorkfield	Core 2 Quad Q8xxx	2x2 MB		65-95 W
	Core 2 Quad Q9xxx	2x3-2x6 MB
	Core 2 Extreme QX9xxx	2x6 MB		130-150 W

[edit] Dunnington

The Xeon "Dunnington" processor (CPUID Family 6, model 30) is closely related to Wolfdale but comes with six cores and an on-chip L3 cache and is designed for servers with Socket 604, so it is not marketed as Core 2. It is mentioned here for completeness.

[edit] Successors

The successors to the Core 2 brand are a set of Nehalem microarchitecture based processors called Core i3, i5, i7 and i9. Core i7 was officially launched on November 17, 2008 as a family of three quad-core processor desktop models, further models started appearing throughout 2009.

With the launch of 32 nm processors in the upcoming months, Intel has scheduled to discontinue some Atom, Celeron, Pentium, Core 2, and even Core i7 models. The Core 2 Extreme QX9775 will be phased out around Q3, 2009. The Core 2 Quad Q8200, Q8200S, Q9400, and Q9400S are scheduled to be discontinued in 2010.^[9] Intel may also rebadge some Core 2 processors in the E7xxx, E8xxx, Q8xxx, Q9xxx and Wolfdale series as Core i3 processors, together with new Core i3 processors using the 45 nm Nehalem microarchitecture^[10][11].

[edit] Pricing

The pricing for various models of Core 2, at the time the processors were released, can be found in the list of Intel Core 2 microprocessors. It should be noted that these prices are what it costs system builders like Apple Inc., Dell and HP to stock Core 2 processors. There are no set MSRPs for Core 2 CPUs in the retail channel — prices at retailers are usually very close to the aforementioned prices, but are dependent on what the supplier is charging to stock these CPUs and on supply and demand.

[edit] Nomenclature and abbreviations

With the release of the Core 2 processor, the abbreviation C2 has come into common use, with its variants C2D (the present Core 2 Duo), and C2Q, C2E to refer to the Core 2 Quad and Core 2 Extreme processors respectively. C2QX stands for the Extreme-Editions of the Quad (QX6700, QX6800, QX6850).

[edit] See also

• Comparison of Intel processors
• List of Intel Pentium Dual-Core microprocessors
• List of Intel Core 2 microprocessors
• List of future Intel microprocessors
• Intel Core
• CPU power dissipation
• Centrino
• Multi-core
• Engineering sample (CPU)

[edit] References

[edit] External links

• Intel Core 2 Duo and intel dual core differences
• Intel Core 2 Duo Processor Numbers
• Intel Penryn Architecture and Performance Preview
• Intel Centrino Duo Mobile Technology papers
• Core 2 Duo Overclocking Guide

[edit] News reports on the Core 2 product launch

• Intel Core Microarchitecture
• Intel's press release announcing Core 2
• Intel's Core 2 page
• Intel Officially Launches 45nm Penryn Family
• Leaked Intel 45 nm Core 2 Desktop Processor Pre-Launch Update
• Announcing Intel Core 2 Duo
• The second coming of Intel's Core Duo
• Intel to launch nine 45nm CPUs in November

[edit] Reviews

• Core 2 Duo E8500 Review Comparing the similarly priced E8500 (Wolfdale) and the E6750 (Conroe) it replaces
• Meet Intel Wolfdale: Core 2 Duo E8500, E8400 and E8200 Processors Review
• Intel Core 2 Extreme QX9650 - Yorkfield Has Landed - Review
• Second Iteration of Core Micro-Architecture (Penryn): Intel Core 2 Extreme QX9650 CPU Review
• Intel Core 2 Extreme QX6700 quad-core CPU review
• Core 2 Extreme (Kentsfield) Quad Core CPU Review
• Intel Core 2 Extreme QX6700 Quad Core - Launch Review
• Review of E6700 model with info for Linux and BSD users
• Intel Core 2 Extreme QX6700 Quad Core
• Core 2 Duo & Core 2 Extreme
• Intel's Core 2 Duo processors
• Core 2 Duo: A Changing of the Guards
• Contemporary Dual-Core Desktop Processors Shootout – X-bit Labs Core 2 Duo review
• Core 2 Duo & Extreme Processors Performance Analysis – Hot Hardware Core 2 Duo review
• Intel Core 2 Performance, Overclocking, Power Usage
• Core 2 Gaming Performance
• Intel's Core 2 Duo and Core 2 Extreme processors
• Intel's Core 2 Extreme & Core 2 Duo: The Empire Strikes Back
• Intel Conroe Core 2 Duo/Extreme Processors
• Game Over? Core 2 Duo Knocks Out Athlon 64 – Tom's Hardware Core 2 Duo review
• Intel Core 2 Duo - Test
• Intel's Core 2 Quadro Kentsfield: Four Cores on a Rampage – Tom's Hardware Core 2 Quad review
• Core 2 Quad Q6600 Review

v • d • e Intel processors Discontinued pre-x86 4004 · 4040 · 8008 · 8080 · 8085 x86-16 (16 bit) 8086 · 8088 · 80186 · 80188 · 80286 x86-32/IA-32 (32 bit) 80386 · 80486 (SX · DX2 · DX4 · SL) · Pentium (Original  · Pro · II · III · 4 · M) · Core · Celeron M · Celeron D · A100 x86-64/EM64T (64 bit) Pentium 4 (Some) · Pentium D · Pentium Extreme Edition · Celeron D (Some) Other iAPX 432 — RISC: i860 · i960 · StrongARM · XScale Current x86-32: EP80579 · Intel CE · Atom — x86-64: Atom (some) · Celeron · Pentium · Core (2 · i3 · i5 · i7) · Xeon — Other: IOP · Itanium Upcoming Tukwila · Moorestown Lists CPU Sockets · Chipsets · Microarchitectures · Processors · Future Processors · Codenames · GMA Atom · Celeron · Core (2 · i3 · i5 · i7) · Itanium · Pentium (Pro · II · III · M · 4 · D · Dual-Core) · Xeon Microarchitectures P5   P5 based cores 0.90 μm P5 0.60 μm P54C 0.35 μm P54CS · P55CS 0.25 μm Tillamook P6   P6 based cores 0.50 μm P6 0.35 μm P6 · Klamath 0.25 μm Mendocino · Dixon · Tonga · Covington · Deschutes · Katmai · Drake · Tanner 180 nm Coppermine · Cascades 130 nm Tualatin · Banias 90 nm Dothan · Stealey 65 nm Yonah · Sossaman NetBurst   NetBurst based cores 180 nm Willamette · Foster 130 nm Northwood · Gallatin · Prestonia 90 nm Tejas and Jayhawk · Prescott · Smithfield · Nocona · Irwindale · Cranford · Potomac · Paxville 65 nm Cedar Mill · Presler · Dempsey · Tulsa Core   Core based cores 65 nm Merom-L · Merom · Conroe-L · Allendale · Conroe · Kentsfield · Woodcrest · Clovertown · Tigerton 45 nm Penryn · Penryn-QC · Wolfdale · Yorkfield · Wolfdale-DP · Harpertown · Dunnington Atom   Atom based cores 45 nm Silverthorne · Diamondville · Pineview Nehalem   Nehalem based cores 45 nm Clarksfield · Lynnfield · Jasper Forest · Bloomfield · Gainestown · Beckton 32 nm Arrandale · Clarkdale · Gulftown Future Larrabee · Sandy Bridge · Haswell