View source for Engineering:Westmere (microarchitecture)

{{Short description|CPU microarchitecture by Intel}}
{{Infobox CPU
| name = Westmere
| image = 
| image_size = 150px
| created = {{start date and age|January 7, 2010}}
| model = Core i''n'', Xeon
| cores = 2-6 (4-10 Xeon)
<!-- | cores1 = 6 (12) (Extreme)
| cores2 = 4-10 (4-20) (Xeon) -->
| transistors = 382M to 2600M 32nm
<!-- (C2)
| transistors1 = 1,170M 32nm (B1)
| transistors2 = 2,600M 32nm (A2) -->
| clock = 1.06 GHz to 3.46 GHz
| l1cache = 64 KB per core
| l2cache = 256 KB per core
| l3cache = 2 MB to 30 MB shared 
| dmi-slowest = 2.50
| qpi-slowest = 4.80
| qpi-fastest = 6.40
| gpu = 533 MHz to 900 MHz<br>177M 45nm (K0)
| arch = [[X86-64|x86-64]]
| microarch = [[Engineering:Nehalem (microarchitecture)|Nehalem]] 
| instructions = [[IA-32]], [[X86-64|x86-64]]
| extensions = [[AES instruction set|AES-NI]], [[CLMUL instruction set|CLMUL]]
| extensions1 = [[MMX (instruction set)|MMX]], [[Streaming SIMD Extensions|SSE]], [[SSE2]], [[SSE3]], [[SSSE3]], [[SSE4]], SSE4.1, SSE4.2
| extensions2 = VT-x, VT-d
| sock1 = LGA 1156
| sock2 = LGA 1366
| sock3 = LGA 1567
| sock4 = rPGA988A
| predecessor = [[Engineering:Nehalem (microarchitecture)|Nehalem]]
| successor = [[Engineering:Sandy Bridge|Sandy Bridge]]
| support status = Unsupported
}}
[[File:Westmere (architettura).svg|thumb|Connection of the [[Engineering:Intel HD Graphics|GPU]] inside the Westmere microarchitecture]]

'''Westmere''' (formerly '''Nehalem-C''') is the code name given to the 32 nm [[Engineering:Die shrink|die shrink]] of ''[[Engineering:Nehalem (microarchitecture)|Nehalem]]''. While sharing the same CPU sockets, Westmere included [[Engineering:Intel HD Graphics|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 [[Engineering:List of Intel Core i3 microprocessors|Core i3]], [[Engineering:List of Intel Core i5 microprocessors|Core i5]], [[Engineering:List of Intel Core i7 microprocessors|Core i7]], [[Engineering:List of Intel Pentium microprocessors|Pentium]], [[Engineering:List of Intel Celeron microprocessors|Celeron]] and [[Engineering:Xeon|Xeon]].

== Technology ==
Westmere's feature improvements from Nehalem, as reported:

* Native six-core (Gulftown) and ten-core (Westmere-EX) processors.<ref>{{cite web|last1=Valich|first1=Theo|title=Intel says no to 28nm, focuses on 22nm: Ivy Bridge/Haswell & Larrabee|url=http://brightsideofnews.com/news/2009/4/16/intel-says-no-to-28nm2c-focuses-on-22nm-ivy-bridgehaswell--larrabee.aspx|access-date=23 March 2015|archive-url=https://web.archive.org/web/20110708093954/http://www.brightsideofnews.com/news/2009/4/16/intel-says-no-to-28nm2c-focuses-on-22nm-ivy-bridgehaswell--larrabee.aspx|archive-date=2011-07-08|date=2009-04-16}}</ref>
* A new set of instructions that gives over 3x the encryption and decryption rate of [[Advanced Encryption Standard]] (AES) processes compared to before.<ref name="bit-tech-070919">{{Citation
 |title=Westmere is Nehalem's successor
 |first=Tim |last=Smalley |date=2007-09-19 |publisher=bit-tech.net
 |url=http://www.bit-tech.net/news/2007/09/19/westmere_is_nehalem_successor/1 }}</ref>
** Delivers seven new instructions ([[AES instruction set]] or AES-NI), out of which six implement the AES algorithm, and PCLMULQDQ (see [[CLMUL instruction set]]) implements carry-less multiplication for use in [[Cryptography|cryptography]] and [[Data compression|data compression]].<ref name="url_Intel_Carry-Less_Multiplication">{{Citation |title=Carry-Less Multiplication and Its Usage for Computing The GCM Mode – Intel Software Network |date=2008-04-11 |url=http://software.intel.com/en-us/articles/carry-less-multiplication-and-its-usage-for-computing-the-gcm-mode |access-date=2009-03-01}}</ref>
* Integrated graphics, added into the processor package (dual core Arrandale and [[Engineering:Clarkdale (microprocessor)|Clarkdale]] only).
* Improved virtualization latency.<ref name="Fudzilla9448">{{Citation |title=Westmere 32nm to improve Nehalem features |author=Fuad Abazovic |publisher=Fudzilla.com |date=2008-09-16 |url=http://www.fudzilla.com/news/processors/12649-westmere-32nm-to-improve-nehalem-features |access-date=2009-03-01}}</ref>
* New virtualization capability: "VMX Unrestricted mode support," which allows 16-bit guests to run (real mode and big real mode).
* Support for "Huge Pages" of 1&nbsp;GB in size.

{| class="wikitable" style="text-align: center"
|+ [[Translation lookaside buffer]] sizes <ref>{{cite web|url=http://software.intel.com/sites/default/files/m/7/c/9/9/c/18976-Nehalem_Uarch_Spring_2008_IDF.pdf |access-date=January 16, 2013 |title=Intel® Developer Zone }}{{dead link|date=June 2016|bot=medic}}{{cbignore|bot=medic}}</ref>
|-
! colspan=2 | Cache
! colspan=3 | Page Size
|-
! Name || Level || 4&nbsp;KB || 2&nbsp;MB || 1&nbsp;GB
|- 
| DTLB || 1st || 64 || 32 || {{n/a}}
|- 
| ITLB || 1st || 128 || 7 / logical core || {{n/a}}
|- 
| STLB || 2nd || 512 || none || none
|-
|}

==CPU variants==

{| class="wikitable" style="text-align: center"
|-
!Processing Cores<br>(Interface)!! Process !! Die Size !! CPUID !! Model !! Stepping !! Mobile !! Desktop,<br>UP Server !! DP Server !! MP Server
|- align="center"
| align= "left"| '''Ten-Core'''<br>(Quad-channel)<ref name="tweaktown_09_14_2010">{{Cite web|url=https://www.tweaktown.com/news/16724/westmere_ex_10_core_cpus_announced_by_intel_at_idf/index.html|title=Westmere-EX 10 core CPUs announced by Intel at IDF|date=September 14, 2010|website=TweakTown}}</ref> || 32&nbsp;nm|| 513&nbsp;mm² || 206F2 || 47 || A2
| || || || Westmere-EX<br>(80615)
|- align="center"
| align="left"| '''Six-Core'''<br>(Triple-Channel) || 32&nbsp;nm|| 248&nbsp;mm² || 206C0&nbsp;(ES/QS),<br>206C1&nbsp;(ES/QS),<br> 206C2 || 44 || A0,<br>B0,<br>B1
| || Gulftown<br>(80613) || Westmere-EP<br>(80614) ||
|- align="center"
| align="left"| '''Dual-Core''' (Dual-Channel,<br>PCIe, Graphics Core) || 32&nbsp;nm<br>45&nbsp;nm|| 114&nbsp;mm²<br>+81&nbsp;mm² || 20652<br>20655 || 37 || C2<br>K0
| Arrandale<br>(80617) || [[Engineering:Clarkdale (microprocessor)|Clarkdale]]<br>(80616) || ||
|}

==Westmere CPUs==

* [[Thermal design power|TDP]] includes the integrated GPU, if present.
* Clarkdale processors feature 16 [[Engineering:PCI Express|PCIe]] 2.0 lanes, which can be used in 1x16 or 2x8 configuration.
* ''Clarkdale'' and ''Arrandale'' contain the 32&nbsp;nm dual core processor ''Hillel'' and the 45&nbsp;nm integrated graphics device ''Ironlake'', and support switchable graphics.<ref name="FS">{{Citation
|title=Intel CPU Roadmap 2009–2010
|last=Bell |first=Brandon
|date=2009-02-10
|publisher=FS Media, Inc
|url=http://www.firingsquad.com/hardware/intel_32nm_westmere_roadmap/page2.asp
|access-date=2009-03-01}}</ref><ref name="HWInfo CPU list">{{Citation |title=CPU list |url=http://www.hwinfo.com/Lists/cpu.htm |archive-url=https://web.archive.org/web/20120301213605/http://www.hwinfo.com/Lists/cpu.htm |archive-date=2012-03-01}}</ref>
* Only certain higher-end CPUs support AES-NI and 1GB Huge Pages.

=== {{anchor|SERVERDESKTOP}}Server / Desktop processors ===

{| class="wikitable"  style="text-align: center"
|-
! rowspan=2 | Codename
! rowspan=2 | Market
! rowspan=2 | Cores /<br />Threads
! rowspan=2 | Socket
! colspan=2 rowspan=2 | Processor<br />Branding & model
! colspan=2 | [[Clock rate]]
! rowspan=2 | Turbo
! rowspan=2 | TDP
! colspan=2 | Interfaces
! rowspan=2 | [[CPU cache#Multi-level caches|L3<br />cache]]
! rowspan=2 | Release<br />Date
! rowspan=2 | Price
|-
! Core
! GPU
! Chipset
! Memory
|-
| rowspan=18 | ''Westmere-EX''<ref>{{Citation |title=Westmere-EX: Intel Improves their Xeon Flagship|url=http://www.anandtech.com/show/4259/westmereex-intels-flagship-improves/2}}</ref>
| rowspan=18 | MP Server
| rowspan=10 | 10 (20)
| rowspan=18 | LGA<br />1567
| rowspan=18 | Xeon 
| E7-8870
| rowspan=3  | 2.4&nbsp;GHz
| rowspan=18 {{n/a}}
| rowspan=16 {{yes}}
| rowspan=3  | 130&nbsp;W
| rowspan=14 | 4× QPI 6.4&nbsp;GT/s
| rowspan=16 | 4× DDR3-1066
| rowspan=4  | 30&nbsp;MB
| rowspan=18 | 2011-04-05<ref>{{Citation|title=Intel Launches New Xeon Chips with Up to Ten Cores|url=http://www.xbitlabs.com/news/cpu/display/20110405135321_Intel_Launches_New_Xeon_Chips_with_Up_to_Ten_Cores.html|access-date=2012-08-20|archive-url=https://web.archive.org/web/20120717093000/http://www.xbitlabs.com/news/cpu/display/20110405135321_Intel_Launches_New_Xeon_Chips_with_Up_to_Ten_Cores.html|archive-date=2012-07-17|url-status=dead}}</ref>
| $4616
|-
| E7-4870
| $4394
|-
| E7-2870
| $4227
|-
| E7-8867L
| 2.13&nbsp;GHz
| 105&nbsp;W
| $4172
|-
| E7-8860
| rowspan=3  | 2.26&nbsp;GHz
| rowspan=7  | 130&nbsp;W
| rowspan=10 | 24&nbsp;MB
| $4061
|-
| E7-4860
| $3838
|-
| E7-2860
| $3670
|-
| E7-8850
| rowspan=3 | 2&nbsp;GHz
| $3059
|-
| E7-4850
| $2837
|-
| E7-2850
| $2558
|-
| 8 (8)
| E7-8837
| 2.66&nbsp;GHz
| rowspan=2 | $2280
|-
| rowspan=5 | 8 (16)
| E7-8830
| rowspan=3 | 2.13&nbsp;GHz
| rowspan=5 | 105&nbsp;W
|-
| E7-4830
| $2059
|-
| E7-2830
| $1779
|-
| E7-4820
| rowspan=2 | 2&nbsp;GHz
| rowspan=2 | 4× QPI 5.86&nbsp;GT/s
| rowspan=4 | 18&nbsp;MB
| $1446
|-
| E7-2820
| $1334
|-
| rowspan=2 | 6 (12)
| E7-4807
| 1.86&nbsp;GHz
| rowspan=2 {{no}}
| 95&nbsp;W
| rowspan=2 | 4× QPI 4.8&nbsp;GT/s
| rowspan=2 | 4× DDR3-800
| $890
|-
| E7-2803
| 1.73&nbsp;GHz
| 105&nbsp;W
| $774
|-
| rowspan="28" | ''Westmere-EP''
| rowspan=28 | DP Server
| 2 (4)
| rowspan=35 | LGA<br />1366
| rowspan=28 | Xeon
| X5698<ref>{{Cite web |title=Intel ships a 4.4GHz Xeon X5698 |author=Hilbert Hagedoorn |date=March 15, 2011 |work=The Guru of 3D |url=http://www.guru3d.com/news-story/intel-ships-a-4-4ghz-xeon-x5698.html }}</ref>
| 4.4&nbsp;GHz
| rowspan=28 {{n/a}}
| {{no}}
| rowspan=3  | 130&nbsp;W
| rowspan=8  | 2× QPI 6.4 [[Transfer (computing)|GT]]/s
| rowspan=18 | 3× DDR3-1333
| rowspan=25 | 12&nbsp;MB
| Q1 2011
| OEM
|-
| rowspan=13 | 6 (12)
| X5690
| 3.46&nbsp;GHz
| rowspan=23 {{yes}}
| 2011-02-13
| rowspan=2 | $1663
|-
| X5680
| 3.33&nbsp;GHz
| 2010-03-16
|-
| X5679
| 3.2&nbsp;GHz
| 115&nbsp;W
| rowspan=2 | 2011-02-13
| OEM
|-
| X5675
| 3.06&nbsp;GHz
| rowspan=4 | 95&nbsp;W
| rowspan=2 | $1440
|-
| X5670
| 2.93&nbsp;GHz
| rowspan=3 | 2010-03-16
|-
| X5660
| 2.8&nbsp;GHz
| $1219
|-
| X5650
| 2.66&nbsp;GHz
| $996
|-
| E5649
| 2.53&nbsp;GHz
| rowspan=2 | 80&nbsp;W
| rowspan=6 | 2× QPI 5.86&nbsp;GT/s
| 2011-02-13
| $774
|-
| E5645
| rowspan=2 | 2.4&nbsp;GHz
| 2010-03-16
| $551
|-
| L5645
| rowspan=4 | 60&nbsp;W
| 2011-02-13
| OEM
|-
| L5640
| 2.26&nbsp;GHz
| 2010-03-16
| $996
|-
| L5639
| 2.13&nbsp;GHz
| 2011-02-13
| OEM
|-
| L5638
| 2.0&nbsp;GHz
| 2010-03-16
| $958
|-
| rowspan=10 | 4 (8)
| X5687
| 3.6&nbsp;GHz
| rowspan=2 | 130&nbsp;W
| rowspan=4 | 2× QPI 6.4&nbsp;GT/s
| 2011-02-13
| rowspan=2 | $1663
|-
| X5677
| 3.46&nbsp;GHz
| 2010-03-16
|-
| X5672
| 3.2&nbsp;GHz
| rowspan=2 | 95&nbsp;W
| 2011-02-13
| rowspan=2 | $1440
|-
| X5667
| 3.06&nbsp;GHz
| 2010-03-16
|-
| X5647
| 2.93&nbsp;GHz
| 130&nbsp;W
| rowspan=6 | 2× QPI 5.86&nbsp;GT/s
| rowspan=10 | 3× DDR3-1066
| 2011-02-13
| rowspan=2 | $774
|-
| E5640
| 2.66&nbsp;GHz
| rowspan=3 | 80&nbsp;W
| rowspan=6 | 2010-03-16
|-
| E5630
| 2.53&nbsp;GHz
| $551
|-
| E5620
| 2.4&nbsp;GHz
| $387
|-
| L5630
| 2.13&nbsp;GHz
| rowspan=3 | 40&nbsp;W
| $551
|-
| L5618
| 1.86&nbsp;GHz
| $530
|-
| rowspan=4 | 4 (4)
| L5609
| 1.86&nbsp;GHz
| rowspan=4 {{no}}
| rowspan=4 | 2× QPI 4.8&nbsp;GT/s
| $440
|-
| E5607
| 2.26&nbsp;GHz
| rowspan=3 | 80&nbsp;W
| rowspan=2 | 8&nbsp;MB
| rowspan=3 | 2011-02-13
| $276
|-
| E5606
| 2.13&nbsp;GHz
| $219
|-
| E5603
| 1.6&nbsp;GHz
| 4&nbsp;MB
| $188
|-
| rowspan="7" |''Gulftown''<ref>{{Citation |title=Intel pushes workhorse Xeons to six cores |url=https://www.theregister.co.uk/2010/03/16/intel_xeon_5600_launch/}}</ref>
| rowspan="3" | UP Server
| rowspan=7 | 6 (12)
| rowspan=3 | Xeon
| W3690
| 3.46&nbsp;GHz
| rowspan=7 {{n/a}}
| rowspan=7 {{yes}}
| rowspan=7 | 130&nbsp;W
| rowspan=2 | 1× QPI 6.4 [[Transfer (computing)|GT]]/s
| rowspan=2 | 3× DDR3-1333
| rowspan=7 | 12&nbsp;MB
| 2011-02-13<ref>{{Citation |title=Intel Xeon X5690 - AT80614005913AB (BX80614X5690) |url=http://www.cpu-world.com/CPUs/Xeon/Intel-Xeon%20X5690%20-%20AT80614005913AB%20(BX80614X5690).html}}</ref>
| $999
|-
| W3680
| 3.33&nbsp;GHz
| 2010-03-16<ref>{{Citation |title=Intel Launches Its Most Secure Data Center Processor |url=http://sanfrancisco.dbusinessnews.com/viewnews.php?article=bwire/20100316005652r1.xml |access-date=2018-11-18 |archive-url=https://web.archive.org/web/20110929080228/http://sanfrancisco.dbusinessnews.com/viewnews.php?article=bwire%2F20100316005652r1.xml# |archive-date=2011-09-29 |url-status=dead }}</ref>
| $999
|-
| W3670
| 3.20&nbsp;GHz
| 1× QPI 4.8&nbsp;GT/s
| rowspan=5 | 3× DDR3-1066
| 2010-08-29
| $885
|-
| rowspan="4" |Extreme /<br />Performance<br />Desktop
| rowspan=2 |Core i7<br />Extreme
| 990X
| 3.46&nbsp;GHz
| rowspan=2 | 1× QPI 6.4&nbsp;GT/s
| 2011-02-13
| rowspan=2 | $999
|-
| 980X
| rowspan=2 |3.33&nbsp;GHz
| 2010-03-16
|-
| rowspan="2" |Core i7
| 980
| rowspan=2 |1× QPI 4.8&nbsp;GT/s
| 2011-06-26
| $583
|-
| 970
| 3.20&nbsp;GHz
| 2010-07-17
| $583
|-
| rowspan=16 | ''Clarkdale''<ref>{{Citation
| title=Intel Clarkdale Processor
| date=2009-02-09
| publisher=XTREVIEW
| url=http://xtreview.com/addcomment-id-7818-view-Intel-clarkdale-processor.html
| access-date=2009-03-01}}</ref>
| rowspan=2  | UP Server
| 2 (4)
| rowspan=16 | LGA<br />1156
| rowspan=2  | Xeon
| L3406
| 2.26&nbsp;GHz
| rowspan=2 {{n/a}}
| rowspan=8 {{yes}}
| rowspan=2  | 30&nbsp;W
| rowspan=16 | [[Engineering:Direct Media Interface|DMI]]
| rowspan=2  | 2× DDR3-1066
| rowspan=12 | 4&nbsp;MB
| 2010-03-16
| $189
|-
| 2 (2)
| L3403
| 2.0&nbsp;GHz
| 2010-10
| OEM
|-
| rowspan=14 | Mainstream /<br />Value<br />Desktop
| rowspan=10 | 2 (4)
| rowspan=6  | Core i5 
| 680
| 3.6&nbsp;GHz
| rowspan=2  | 733&nbsp;MHz
| rowspan=2  | 73&nbsp;W
| rowspan=10 | 2× DDR3-1333
| 2010-04-18
| $294
|-
| 670
| 3.46&nbsp;GHz
| rowspan=3 | 2010-01-07
| $284
|-
| 661
| rowspan=2 | 3.33&nbsp;GHz
| 900&nbsp;MHz
| 87&nbsp;W
| rowspan=2 | $196
|-
| 660
| rowspan=7  | 733&nbsp;MHz
| rowspan=11 | 73&nbsp;W
|-
| 655K
| rowspan=2 | 3.2&nbsp;GHz
| 2010-05-30
| $216
|-
| 650
| 2010-01-07
| $176
|-
| rowspan=4 | Core i3
| 560
| 3.33&nbsp;GHz
| rowspan=8 {{no}}
| 2010-08-29
| rowspan=2|$138
|-
| 550
| 3.20&nbsp;GHz
| 2010-05-30
|-
| 540
| 3.06&nbsp;GHz
| rowspan=2 | 2010-01-07
| $133
|-
| 530
| rowspan=2 | 2.93&nbsp;GHz
| $113
|-
| rowspan=4 | 2 (2)
| rowspan=3 | Pentium
| G6960
| rowspan=4 | 533&nbsp;MHz
| rowspan=4 | 2× DDR3-1066
| rowspan=3 | 3&nbsp;MB
| 2011-01-09
| $89
|-
| G6951
| rowspan=2 | 2.8&nbsp;GHz
| Q3 2010
| OEM
|-
| G6950
| rowspan=2 | 2010-01-07
| $87
|-
| Celeron
| G1101
| 2.26&nbsp;GHz
| 2&nbsp;MB
| $70
|-
! rowspan=2 | Codename
! rowspan=2 | Market
! rowspan=2 | Cores /<br />Threads
! rowspan=2 | Socket
! colspan=2 rowspan=2 | Processor<br />Branding & model
! Core
! GPU
! rowspan=2 | Turbo
! rowspan=2 | TDP
! Chipset
! Memory
! rowspan=2 | L3<br />cache
! rowspan=2 | Release<br />Date
! rowspan=2 | Price
|-
! colspan=2 | Clock rate
! colspan=2 | Interfaces
|}

===Mobile processors===

{| class="wikitable"  style="text-align: center"
|-
! rowspan=2 | Codename
! rowspan=2 | Market
! rowspan=2 | Cores /<br>Threads
! colspan=2 rowspan=2 | Processor<br>Branding & Model
! colspan=2 | CPU [[Clock rate]]
! rowspan=2 | GPU [[Clock rate]]
! rowspan=2 | Turbo
! rowspan=2 | TDP
! rowspan=2 | Memory
! rowspan=2 | [[CPU cache#Multi-level caches|L3<br>cache]]
! rowspan=2 | Interface
! rowspan=2 | Release<br>Date
! rowspan=2 | Price
|-
! Standard
! [[Engineering:Intel Turbo Boost|Turbo]]<br>(1C/2C active cores )
|-
| rowspan="40" | Arrandale
| rowspan="40" | Mainstream /  
Value Mobile
| rowspan="30" | 2 (4)
| rowspan=10 | Core i7
| 640M
| 2.8&nbsp;GHz
| 3.46/3.2&nbsp;GHz
| rowspan=3 | 766&nbsp;MHz
| rowspan=23 {{yes}}
| rowspan=3 | 35&nbsp;W
| rowspan=6 | 2× DDR3-1066
| rowspan=10 | 4&nbsp;MB
| rowspan="40" | * DMI<br>* [[Engineering:PCI Express|PCIe]] 1 x16<br>* Socket:<br>µPGA-988 /<br>BGA-1288
| 2010-09-26
| $346
|-
| 620M
| 2.66&nbsp;GHz
| 3.33/3.06&nbsp;GHz
| rowspan=2 | 2010-01-07
| rowspan=2 | $332
|-
| 610E
| 2.53&nbsp;GHz
| 3.2/2.93&nbsp;GHz
|-
| 660LM
| 2.26&nbsp;GHz
| 3.06/2.8&nbsp;GHz
| rowspan=3 | 566&nbsp;MHz
| rowspan=3 | 25&nbsp;W
| 2010-09-26
| $346
|-
| 640LM
| 2.13&nbsp;GHz
| 2.93/2.66&nbsp;GHz
| rowspan=2 | 2010-01-07
| $332
|-
| 620LM / 620LE
| 2.0&nbsp;GHz
| 2.8/2.53&nbsp;GHz
| $300
|-
| 680UM
| 1.46&nbsp;GHz
| 2.53/2.16&nbsp;GHz
| rowspan=4 | 500&nbsp;MHz
| rowspan=4 | 18&nbsp;W
| rowspan=4 | 2× DDR3-800
| 2010-09-26
| rowspan=2 | $317
|-
| 660UM / 660UE
| 1.33&nbsp;GHz
| 2.4/2.0&nbsp;GHz
| 2010-05-25
|-
| 640UM
| 1.2&nbsp;GHz
| 2.26/1.86&nbsp;GHz
| rowspan=2 | 2010-01-07
| $305
|-
| 620UM / 620UE
| 1.06&nbsp;GHz
| 2.13/1.76&nbsp;GHz
| $278
|-
| rowspan=13 | Core i5
| 580M
| rowspan=2 | 2.66&nbsp;GHz
| 3.33/2.93&nbsp;GHz
| rowspan=4 | 766&nbsp;MHz
| rowspan=4 | 35&nbsp;W
| rowspan=4 | 2× DDR3-1066
| rowspan=26 | 3&nbsp;MB
| rowspan=2 | 2010-09-26
| $266
|-
| 560M
| 3.2/2.93&nbsp;GHz
| $225
|-
| 540M
| 2.53&nbsp;GHz
| 3.06/2.8&nbsp;GHz
| rowspan=2 | 2010-01-07
| $257
|-
| 520M / 520E
| 2.4&nbsp;GHz
| 2.93/2.66&nbsp;GHz
| $225
|-
| 560UM
| 1.33&nbsp;GHz
| 2.13/1.86&nbsp;GHz
| rowspan=3 | 500&nbsp;MHz
| rowspan=3 | 18&nbsp;W
| rowspan=3 | 2× DDR3-800
| 2010-09-26
| rowspan=2 | $250
|-
| 540UM
| 1.2&nbsp;GHz
| 2.0/1.73&nbsp;GHz
| 2010-05-25
|-
| 520UM
| 1.06&nbsp;GHz
| 1.86/1.6&nbsp;GHz
| 2010-01-07
| $241
|-
| 480M
| 2.66&nbsp;GHz
| 2.93/2.93&nbsp;GHz
| rowspan=4 | 766&nbsp;MHz
| rowspan=4 | 35&nbsp;W
| rowspan=4 | 2× DDR3-1066
| 2011-01-09
| rowspan=19 | OEM
|-
| 460M
| 2.53&nbsp;GHz
| 2.8/2.8&nbsp;GHz
| 2010-09-26
|-
| 450M
| 2.4&nbsp;GHz
| 2.66/2.66&nbsp;GHz
| 2010-06-26
|-
| 430M
| 2.26&nbsp;GHz
| 2.53/2.53&nbsp;GHz
| 2010-01-07
|-
| 470UM
| 1.33&nbsp;GHz
| 1.86/1.6&nbsp;GHz
| rowspan=2 | 500&nbsp;MHz
| rowspan=2 | 18&nbsp;W
| rowspan=2 | 2× DDR3-800
| 2010-10-01
|-
| 430UM
| 1.2&nbsp;GHz
| 1.73/1.46&nbsp;GHz
| 2010-05-25
|-
| rowspan=7 | Core i3
| 390M
| 2.66&nbsp;GHz
| rowspan=17 | n/a
| rowspan=5 | 667&nbsp;MHz
| rowspan=17 {{no}}
| rowspan=5 | 35&nbsp;W
| rowspan=5 | 2× DDR3-1066
| 2011-01-09
|-
| 380M
| 2.53&nbsp;GHz
| 2010-09-26
|-
| 370M
| 2.4&nbsp;GHz
| 2010-06-20
|-
| 350M
| 2.26&nbsp;GHz
| rowspan=2 | 2010-01-07
|-
| 330M / 330E
| 2.13&nbsp;GHz
|-
| 380UM
| 1.33&nbsp;GHz
| rowspan=2 | 500&nbsp;MHz
| rowspan=2 | 18&nbsp;W
| rowspan=2 | 2× DDR3-800
| 2010-10-01
|-
| 330UM
| 1.2&nbsp;GHz
| 2010-05-25
|-
| rowspan=10 | 2 (2)
| rowspan=6 | Pentium
| P6300
| 2.26&nbsp;GHz
| rowspan=4 | 667&nbsp;MHz
| rowspan=4 | 35&nbsp;W
| rowspan=4 | 2× DDR3-1066
| 2011-01-09
|-
| P6200
| 2.13&nbsp;GHz
| rowspan=2 | 2010-09-26
|-
| P6100
| 2.0&nbsp;GHz
|-
| P6000
| 1.86&nbsp;GHz
| 2010-06-20
|-
| U5600
| 1.33&nbsp;GHz
| rowspan=2 | 500&nbsp;MHz
| rowspan=2 | 18&nbsp;W
| rowspan=2 | 2× DDR3-800
| 2011-01-09
|-
| U5400
| 1.2&nbsp;GHz
| 2010-05-25
|-
| rowspan=4 | Celeron
| P4600
| 2.0&nbsp;GHz
| rowspan=2 | 667&nbsp;MHz
| rowspan=2 | 35&nbsp;W
| rowspan=2 | 2× DDR3-1066
| rowspan=4 | 2&nbsp;MB
| 2010-09-26
| $86
|-
| P4500 / P4505
| 1.86&nbsp;GHz
| 2010-03-28
| OEM
|-
| U3600
| 1.2&nbsp;GHz
| rowspan=2 | 500&nbsp;MHz
| rowspan=2 | 18&nbsp;W
| 2× DDR3-800
| 2011-01-09
| $134
|-
| U3400 / U3405
| 1.06&nbsp;GHz
| 2× DDR3-800 / 1066
| 2010-05-25
| OEM
|}

==Roadmap==
The successor to ''Nehalem'' and ''Westmere'' is ''Sandy Bridge''.

==See also==
* [[Engineering:List of Intel CPU microarchitectures|List of Intel CPU microarchitectures]]
* Tick-Tock model

==References==
{{Reflist|30em}}

==External links==
* [https://web.archive.org/web/20121025074204/http://ark.intel.com/products/codename/33174/Westmere-EP Official Intel homepage for Westmere-EP]
* [https://web.archive.org/web/20121025075207/http://ark.intel.com/products/codename/33175/Westmere-EX Official Intel homepage for Westmere-EX]
* [http://www.hotchips.org/wp-content/uploads/hc_archives/hc22/HC22.24.610-Nagara-Intel-6-Westmere-EX.pdf Westmere-EX: A 20 thread server CPU] (PDF)

{{Intel processors|nehalem}}

[[Category:Intel microarchitectures]]

{{Sourceattribution|Westmere (microarchitecture)}}