|Launched||January 7, 2010|
|Max. CPU clock rate||1.06 GHz to 3.46 GHz|
|L1 cache||64 KB per core|
|L2 cache||256 KB per core|
|L3 cache||4 MB to 30 MB shared|
|Architecture and classification|
|GPU(s)||533 MHz to 900 MHz|
177M 45nm (K0)
|Products, models, variants|
Westmere (formerly Nehalem-C) is the code name given to the 32 nm die shrink of Nehalem . While sharing the same CPU sockets, Westmere included Intel HD Graphics, while Nehalem did not.
The first Westmere-based processors were launched on January 7, 2010, by Intel Corporation.
The Westmere architecture has been available under the Intel brands of Core i3, Core i5, Core i7, Pentium, Celeron and Xeon.
Westmere's feature improvements from Nehalem, as reported:
|Name||Level||4 KB||2 MB||1 GB|
|ITLB||1st||128||7 / logical core||N/A|
|DP Server||MP Server|
|32 nm||513 mm²||206F2||47||A2|| Westmere-EX |
|32 nm||248 mm²||206C0 (ES/QS),|
| Gulftown |
| Westmere-EP |
PCIe, Graphics Core)
| Arrandale |
| Clarkdale |
|Codename||Market|| Cores /|
Branding & model
|Clock rate||Turbo||TDP||Interfaces|| L3|
|Westmere-EX||MP Server||10 (20)||LGA|
|Xeon||E7-8870||2.4 GHz||N/A||Yes||130 W||4× QPI 6.4 GT/s||4× DDR3-1066||30 MB||2011-04-05||$4616|
|E7-8867L||2.13 GHz||105 W||$4172|
|E7-8860||2.26 GHz||130 W||24 MB||$4061|
|8 (8)||E7-8837||2.66 GHz||$2280|
|8 (16)||E7-8830||2.13 GHz||105 W|
|E7-4820||2 GHz||4× QPI 5.86 GT/s||18 MB||$1446|
|6 (12)||E7-4807||1.86 GHz||No||95 W||4× QPI 4.8 GT/s||4× DDR3-800||$890|
|E7-2803||1.73 GHz||105 W||$774|
|DP Server||2 (4)||LGA|
|Xeon||X5698||4.4 GHz||N/A||No||130 W||2× QPI 6.4 GT/s||3× DDR3-1333||12 MB||Q1 2011||OEM|
|6 (12)||X5690||3.46 GHz||Yes||2011-02-13||$1663|
|X5679||3.2 GHz||115 W||2011-02-13||OEM|
|X5675||3.06 GHz||95 W||$1440|
|E5649||2.53 GHz||80 W||2× QPI 5.86 GT/s||2011-02-13||$774|
|4 (8)||X5687||3.6 GHz||130 W||2× QPI 6.4 GT/s||2011-02-13||$1663|
|X5672||3.2 GHz||95 W||2011-02-13||$1440|
|X5647||2.93 GHz||130 W||2× QPI 5.86 GT/s||3× DDR3-1066||2011-02-13||$774|
|E5640||2.66 GHz||80 W||2010-03-16|
|L5630||2.13 GHz||40 W||$551|
|4 (4)||L5609||1.86 GHz||No||2× QPI 4.8 GT/s||$440|
|E5607||2.26 GHz||80 W||8 MB||2011-02-13||$276|
|E5603||1.6 GHz||4 MB||$188|
|UP Server||6 (12)||Xeon||W3690||3.46 GHz||N/A||Yes||130 W||1× QPI 6.4 GT/s||3× DDR3-1333||12 MB||2011-02-13||$999|
|W3670||3.20 GHz||1× QPI 4.8 GT/s||3× DDR3-1066||2010-08-29||$885|
|990X||3.46 GHz||1× QPI 6.4 GT/s||2011-02-13||$999|
|Core i7||980||1× QPI 4.8 GT/s||2011-06-26||$583|
|Clarkdale||UP Server||2 (4)||LGA|
|Xeon||L3406||2.26 GHz||N/A||Yes||30 W||DMI||2× DDR3-1066||4 MB||2010-03-16||$189|
|2 (2)||L3403||2.0 GHz||2010-10||$|
|2 (4)||Core i5||680||3.6 GHz||733 MHz||73 W||2× DDR3-1333||2010-04-18||$294|
|661||3.33 GHz||900 MHz||87 W||$196|
|660||733 MHz||73 W|
|Core i3||560||3.33 GHz||No||2010-08-29||$138|
|2 (2)||Pentium||G6960||533 MHz||2× DDR3-1066||3 MB||2011-01-09||$89|
|G6951||2.8 GHz||Q3 2010||OEM|
|Celeron||G1101||2.26 GHz||2 MB||$70|
Branding & model
|Codename||Market|| Cores /|
Branding & Model
|CPU Clock rate||GPU Clock rate||Turbo||TDP||Memory|| L3|
|Standard|| Turbo |
(1C/2C active cores )
|Arrandale||Mainstream / |
|2 (4)||Core i7||640M||2.8 GHz||3.46/3.2 GHz||766 MHz||Yes||35 W||2× DDR3-1066||4 MB||* DMI|
* PCIe 1 x16
|620M||2.66 GHz||3.33/3.06 GHz||2010-01-07||$332|
|610E||2.53 GHz||3.2/2.93 GHz|
|660LM||2.26 GHz||3.06/2.8 GHz||566 MHz||25 W||2010-09-26||$346|
|640LM||2.13 GHz||2.93/2.66 GHz||2010-01-07||$332|
|620LM / 620LE||2.0 GHz||2.8/2.53 GHz||$300|
|680UM||1.46 GHz||2.53/2.16 GHz||500 MHz||18 W||2× DDR3-800||2010-09-26||$317|
|660UM / 660UE||1.33 GHz||2.4/2.0 GHz||2010-05-25|
|640UM||1.2 GHz||2.26/1.86 GHz||2010-01-07||$305|
|620UM / 620UE||1.06 GHz||2.13/1.76 GHz||$278|
|Core i5||580M||2.66 GHz||3.33/2.93 GHz||766 MHz||35 W||2× DDR3-1066||3 MB||2010-09-26||$266|
|540M||2.53 GHz||3.06/2.8 GHz||2010-01-07||$257|
|520M / 520E||2.4 GHz||2.93/2.66 GHz||$225|
|560UM||1.33 GHz||2.13/1.86 GHz||500 MHz||18 W||2× DDR3-800||2010-09-26||$250|
|540UM||1.2 GHz||2.0/1.73 GHz||2010-05-25|
|520UM||1.06 GHz||1.86/1.6 GHz||2010-01-07||$241|
|480M||2.66 GHz||2.93/2.93 GHz||766 MHz||35 W||2× DDR3-1066||2011-01-09||OEM|
|460M||2.53 GHz||2.8/2.8 GHz||2010-09-26|
|450M||2.4 GHz||2.66/2.66 GHz||2010-06-26|
|430M||2.26 GHz||2.53/2.53 GHz||2010-01-07|
|470UM||1.33 GHz||1.86/1.6 GHz||500 MHz||18 W||2× DDR3-800||2010-10-01|
|430UM||1.2 GHz||1.73/1.46 GHz||2010-05-25|
|Core i3||390M||2.66 GHz||n/a||667 MHz||No||35 W||2× DDR3-1066||2011-01-09|
|330M / 330E||2.13 GHz|
|380UM||1.33 GHz||500 MHz||18 W||2× DDR3-800||2010-10-01|
|2 (2)||Pentium||P6300||2.26 GHz||667 MHz||35 W||2× DDR3-1066||2011-01-09|
|U5600||1.33 GHz||500 MHz||18 W||2× DDR3-800||2011-01-09|
|Celeron||P4600||2.0 GHz||667 MHz||35 W||2× DDR3-1066||2 MB||2010-09-26||$86|
|P4500 / P4505||1.86 GHz||2010-03-28||OEM|
|U3600||1.2 GHz||500 MHz||18 W||2× DDR3-800||2011-01-09||$134|
|U3400 / U3405||1.06 GHz||2× DDR3-800 / 1066||2010-05-25||OEM|
The successor to Nehalem and Westmere is Sandy Bridge .
Xeon is a brand of x86 microprocessors designed, manufactured, and marketed by Intel, targeted at the non-consumer workstation, server, and embedded system markets. It was introduced in June 1998. Xeon processors are based on the same architecture as regular desktop-grade CPUs, but have advanced features such as support for ECC memory, higher core counts, more PCI Express lanes, support for larger amounts of RAM, larger cache memory and extra provision for enterprise-grade reliability, availability and serviceability (RAS) features responsible for handling hardware exceptions through the Machine Check Architecture. They are often capable of safely continuing execution where a normal processor cannot due to these extra RAS features, depending on the type and severity of the machine-check exception (MCE). Some also support multi-socket systems with two, four, or eight sockets through use of the Quick Path Interconnect (QPI) bus.
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The Intel QuickPath Interconnect (QPI) is a point-to-point processor interconnect developed by Intel which replaced the front-side bus (FSB) in Xeon, Itanium, and certain desktop platforms starting in 2008. It increased the scalability and available bandwidth. Prior to the name's announcement, Intel referred to it as Common System Interface (CSI). Earlier incarnations were known as Yet Another Protocol (YAP) and YAP+.
Pentium is a brand used for a series of x86 architecture-compatible microprocessors produced by Intel. The original Pentium was released in 1993. After that, the Pentium II and Pentium III were released.
Nehalem is the codename for Intel's 45 nm microarchitecture released in November 2008. It was used in the first-generation of the Intel Core i5 and i7 processors, and succeeds the older Core microarchitecture used on Core 2 processors. The term "Nehalem" comes from the Nehalem River.
Sandy Bridge is the codename for Intel's 32 nm microarchitecture used in the second generation of the Intel Core processors. The Sandy Bridge microarchitecture is the successor to Nehalem and Westmere microarchitecture. Intel demonstrated a Sandy Bridge processor in 2009, and released first products based on the architecture in January 2011 under the Core brand.
Haswell is the codename for a processor microarchitecture developed by Intel as the "fourth-generation core" successor to the Ivy Bridge. Intel officially announced CPUs based on this microarchitecture on June 4, 2013, at Computex Taipei 2013, while a working Haswell chip was demonstrated at the 2011 Intel Developer Forum. With Haswell, which uses a 22 nm process, Intel also introduced low-power processors designed for convertible or "hybrid" ultrabooks, designated by the "U" suffix.
An Advanced Encryption Standard instruction set is now integrated into many processors. The purpose of the instruction set is to improve the speed and security of applications performing encryption and decryption using Advanced Encryption Standard (AES).
Carry-less Multiplication (CLMUL) is an extension to the x86 instruction set used by microprocessors from Intel and AMD which was proposed by Intel in March 2008 and made available in the Intel Westmere processors announced in early 2010. Mathematically, the instruction implements multiplication of polynomials over the finite field GF(2) where the bitstring represents the polynomial . The CLMUL instruction also allows a more efficient implementation of the closely related multiplication of larger finite fields GF(2k) than the traditional instruction set.
Gulftown or Westmere-EP is the codename of an up to six-core hyperthreaded Intel processor able to run up to 12 threads in parallel. It is based on Westmere microarchitecture, the 32 nm shrink of Nehalem. Originally rumored to be called the Intel Core i9, it is sold as an Intel Core i7. The first release was the Core i7 980X in the first quarter of 2010, along with its server counterpart, the Xeon 3600 and the dual-socket Xeon 5600 (Westmere-EP) series using identical chips.
Bloomfield is the code name for Intel high-end desktop processors sold as Core i7-9xx and single-processor servers sold as Xeon 35xx., in almost identical configurations, replacing the earlier Yorkfield processors. The Bloomfield core is closely related to the dual-processor Gainestown, which has the same CPUID value of 0106Ax and which uses the same socket. Bloomfield uses a different socket than the later Lynnfield and Clarksfield processors based on the same 45 nm Nehalem microarchitecture, even though some of these share the same Intel Core i7 brand.
Arrandale is the code name for a family of mobile Intel processors, sold as mobile Intel Core i3, i5 and i7 as well as Celeron and Pentium. It is closely related to the desktop Clarkdale processor; both use dual-core dies based on the Westmere 32 nm die shrink of the Nehalem microarchitecture, and have integrated Graphics as well as PCI Express and DMI links.
Intel Core are streamlined midrange consumer, workstation and enthusiast computers central processing units (CPU) marketed by Intel Corporation. These processors displaced the existing mid- to high-end Pentium processors at the time of their introduction, moving the Pentium to the entry level. Identical or more capable versions of Core processors are also sold as Xeon processors for the server and workstation markets.
Clarkdale is the codename for Intel's first-generation Core i5, i3 and Pentium dual-core desktop processors. It is closely related to the mobile Arrandale processor; both use dual-core dies based on the 32 nm Westmere microarchitecture and have integrated Graphics, PCI Express and DMI links built-in.
Intel Graphics Technology (GT) is the collective name for a series of integrated graphics processors (IGPs) produced by Intel that are manufactured on the same package or die as the central processing unit (CPU). It was first introduced in 2010 as Intel HD Graphics and renamed in 2017 as Intel UHD Graphics.
Socket G1, also known as rPGA 988A, is Intel's CPU socket for their line of mobile Core i7, the successor to the Core 2 line. It is based on Intel's Nehalem architecture which was first available for the 1366-pin "Socket B", which, like its predecessor, LGA775, uses the LGA socket configuration. Later followed the updated LGA-1156 socket, which moved the QPI and PCI-express controller off the Northbridge and onto the CPU. As a result of the lower pin count, LGA-1156 systems, and later, socket G1 systems, can only run in Dual-channel memory mode, as opposed to the Triple-channel mode which is unique to the LGA-1366 platform. The Nehalem's mobile variant was released on September 23, 2009 in the form of the i7-720QM, 820QM, and 920XM models, followed by the i7-740QM, 840QM, and 940XM models on June 21, 2010. The newer CPUs use the new Clarksfield core, which maintained the same 45 nm manufacturing process as the desktop-based Nehalems. Nehalem received a die shrink on January 7, 2010, under the core name of Westmere. With the Intel GMA HD Graphics Ironlake core packaged onto the CPU substrate, but not integrated directly to the processor die, it goes on to create the Arrandale-based line. The current CPUs to use this package are the Core i7-6x0M series, the Core i5-4x0M series, the Core i5-5x0M series, the Core i3-3x0M series, and finally the Pentium P6x00 series and Celeron P4x00 series which were released on March 28, 2010. However, not all of these are available for Socket G1, as some of them are only available in a BGA package. They are also known as PGA988 socket processors.
Ivy Bridge is the codename for Intel's 22 nm microarchitecture used in the third generation of the Intel Core processors. Ivy Bridge is a die shrink to 22 nm process based on FinFET ("3D") Tri-Gate transistors, from the former generation's 32 nm Sandy Bridge microarchitecture—also known as tick–tock model. The name is also applied more broadly to the Xeon and Core i7 Ivy Bridge-E series of processors released in 2013.