Westmere (microarchitecture)

CPU microarchitecture by Intel
  • AES-NI, CLMUL
  • MMX, SSE, SSE2, SSE3, SSSE3, SSE4, SSE4.1, SSE4.2
  • VT-x, VT-d
Physical specificationsTransistors
  • 382M to 2600M 32nm
Cores
  • 2-6 (4-10 Xeon)
GPUs533 MHz to 900 MHz
177M 45nm (K0)Sockets
  • LGA 1156
  • LGA 1366
  • LGA 1567
  • rPGA988A
Products, models, variantsModel
  • Core in, Xeon
HistoryPredecessorNehalemSuccessorSandy BridgeSupport statusUnsupported
Connection of the GPU inside the Westmere microarchitecture

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.

Technology

Westmere's feature improvements from Nehalem, as reported:

  • Native six-core (Gulftown) and ten-core (Westmere-EX) processors.[1]
  • A new set of instructions that gives over 3x the encryption and decryption rate of Advanced Encryption Standard (AES) processes compared to before.[2]
  • Integrated graphics, added into the processor package (dual core Arrandale and Clarkdale only).
  • Improved virtualization latency.[4]
  • 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 GB in size.
Translation lookaside buffer sizes [5]
Cache Page size
Name Level 4 KB 2 MB 1 GB
DTLB 1st 64 32 —
ITLB 1st 128 7 / logical core —
STLB 2nd 512 none none

CPU variants

Processing cores
(interface)		 Process Die size CPUID Model Stepping Mobile Desktop,
UP server		 DP server MP server
Ten-Core
(Quad-channel)[6]		 32 nm 513 mm2 206F2 47 A2 Westmere-EX
(80615)
Six-Core
(Triple-Channel)		 32 nm 248 mm2 206C0 (ES/QS),
206C1 (ES/QS),
206C2		 44 A0,
B0,
B1 		Gulftown
(80613)		 Westmere-EP
(80614)
Dual-Core (Dual-Channel,
PCIe, Graphics Core)		 32 nm
45 nm		 114 mm2
+81 mm2		 20652
20655		 37 C2
K0 		Arrandale
(80617)		 Clarkdale
(80616)

Westmere CPUs

Intel Xeon E7-2850 die shot (Westmere-EX)
  • TDP includes the integrated GPU, if present.
  • Clarkdale processors feature 16 PCIe 2.0 lanes, which can be used in 1x16 or 2x8 configuration.
  • Clarkdale and Arrandale contain the 32 nm dual core processor Hillel and the 45 nm integrated graphics device Ironlake, and support switchable graphics.[7][8]
  • Only certain higher-end CPUs support AES-NI and 1GB Huge Pages.

Server / Desktop processors

Codename Market Cores /
threads 		Socket Processor
branding & model 		Clock rate Turbo TDP Interfaces L3
cache 		Release
date 		Price
Core GPU Chipset Memory
Westmere-EX[9] MP Server 10 (20) LGA
1567 		Xeon E7-8870 2.4 GHz — Yes 130 W 4× QPI 6.4 GT/s 4× DDR3-1066 30 MB 2011-04-05[10] $4616
E7-4870 $4394
E7-2870 $4227
E7-8867L 2.13 GHz 105 W $4172
E7-8860 2.26 GHz 130 W 24 MB $4061
E7-4860 $3838
E7-2860 $3670
E7-8850 2 GHz $3059
E7-4850 $2837
E7-2850 $2558
8 (8) E7-8837 2.66 GHz $2280
8 (16) E7-8830 2.13 GHz 105 W
E7-4830 $2059
E7-2830 $1779
E7-4820 2 GHz 4× QPI 5.86 GT/s 18 MB $1446
E7-2820 $1334
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
Westmere-EP DP Server 2 (4) LGA
1366 		Xeon X5698[11] 4.4 GHz — 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
X5680 3.33 GHz 2010-03-16
X5679 3.2 GHz 115 W 2011-02-13 OEM
X5675 3.06 GHz 95 W $1440
X5670 2.93 GHz 2010-03-16
X5660 2.8 GHz $1219
X5650 2.66 GHz $996
E5649 2.53 GHz 80 W 2× QPI 5.86 GT/s 2011-02-13 $774
E5645 2.4 GHz 2010-03-16 $551
L5645 60 W 2011-02-13 OEM
L5640 2.26 GHz 2010-03-16 $996
L5639 2.13 GHz 2011-02-13 OEM
L5638 2.0 GHz 2010-03-16 $958
4 (8) X5687 3.6 GHz 130 W 2× QPI 6.4 GT/s 2011-02-13 $1663
X5677 3.46 GHz 2010-03-16
X5672 3.2 GHz 95 W 2011-02-13 $1440
X5667 3.06 GHz 2010-03-16
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
E5630 2.53 GHz $551
E5620 2.4 GHz $387
L5630 2.13 GHz 40 W $551
L5618 1.86 GHz $530
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
E5606 2.13 GHz $219
E5603 1.6 GHz 4 MB $188
Gulftown[12] UP Server 6 (12) Xeon W3690 3.46 GHz — Yes 130 W 1× QPI 6.4 GT/s 3× DDR3-1333 12 MB 2011-02-13[13] $999
W3680 3.33 GHz 2010-03-16[14] $999
W3670 3.20 GHz 1× QPI 4.8 GT/s 3× DDR3-1066 2010-08-29 $885
Extreme /
Performance
Desktop 		Core i7
Extreme 		990X 3.46 GHz 1× QPI 6.4 GT/s 2011-02-13 $999
980X 3.33 GHz 2010-03-16
Core i7 980 1× QPI 4.8 GT/s 2011-06-26 $583
970 3.20 GHz 2010-07-17 $583
Clarkdale[15] UP Server 2 (4) LGA
1156 		Xeon L3406 2.26 GHz — Yes 30 W DMI 2× DDR3-1066 4 MB 2010-03-16 $189
2 (2) L3403 2.0 GHz 2010-10 OEM
Mainstream /
Value
Desktop 		2 (4) Core i5 680 3.6 GHz 733 MHz 73 W 2× DDR3-1333 2010-04-18 $294
670 3.46 GHz 2010-01-07 $284
661 3.33 GHz 900 MHz 87 W $196
660 733 MHz 73 W
655K 3.2 GHz 2010-05-30 $216
650 2010-01-07 $176
Core i3 560 3.33 GHz No 2010-08-29 $138
550 3.20 GHz 2010-05-30
540 3.06 GHz 2010-01-07 $133
530 2.93 GHz $113
2 (2) Pentium G6960 533 MHz 2× DDR3-1066 3 MB 2011-01-09 $89
G6951 2.8 GHz Q3 2010 OEM
G6950 2010-01-07 $87
Celeron G1101 2.26 GHz 2 MB $70
Codename Market Cores /
Threads 		Socket Processor
Branding & model 		Core GPU Turbo TDP Chipset Memory L3
cache 		Release
Date 		Price
Clock rate Interfaces

Mobile processors

Codename Market Cores /
threads 		Processor
branding & model 		CPU Clock rate GPU clock rate Turbo TDP Memory L3
cache 		Interface Release
date 		Price
Standard Turbo
(1C/2C active cores )
Arrandale Mainstream /

Value Mobile

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
* Socket:
μPGA-988 /
BGA-1288 		2010-09-26 $346
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
560M 3.2/2.93 GHz $225
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
380M 2.53 GHz 2010-09-26
370M 2.4 GHz 2010-06-20
350M 2.26 GHz 2010-01-07
330M / 330E 2.13 GHz
380UM 1.33 GHz 500 MHz 18 W 2× DDR3-800 2010-10-01
330UM 1.2 GHz 2010-05-25
2 (2) Pentium P6300 2.26 GHz 667 MHz 35 W 2× DDR3-1066 2011-01-09
P6200 2.13 GHz 2010-09-26
P6100 2.0 GHz
P6000 1.86 GHz 2010-06-20
U5600 1.33 GHz 500 MHz 18 W 2× DDR3-800 2011-01-09
U5400 1.2 GHz 2010-05-25
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

Roadmap

The successor to Nehalem and Westmere is Sandy Bridge.

  • v
  • t
  • e
Intel CPU core roadmaps from P6 to Panther Lake
Atom (ULV) Node name Pentium/Core
Microarch. Step Microarch. Step
600 nm P6 Pentium Pro
(133 MHz)
500 nm Pentium Pro
(150 MHz)
350 nm Pentium Pro
(166–200 MHz)
Klamath
250 nm Deschutes
Katmai NetBurst
180 nm Coppermine Willamette
130 nm Tualatin Northwood
Pentium M Banias NetBurst(HT) NetBurst(×2)
90 nm Dothan Prescott ⇨ Prescott‑2M ⇨ Smithfield
Tejas → ⇩ → Cedarmill (Tejas)
65 nm Yonah Nehalem (NetBurst) Cedar Mill ⇨ Presler
Core Merom 4 cores on mainstream desktop, DDR3 introduced
Bonnell Bonnell 45 nm Penryn
Nehalem Nehalem HT reintroduced, integrated MC, PCH
L3-cache introduced, 256KB L2-cache/core
Saltwell 32 nm Westmere Introduced GPU on same package and AES-NI
Sandy Bridge Sandy Bridge On-die ring bus, no more non-UEFI motherboards
Silvermont Silvermont 22 nm Ivy Bridge
Haswell Haswell Fully integrated voltage regulator
Airmont 14 nm Broadwell
Skylake Skylake DDR4 introduced on mainstream desktop
Goldmont Goldmont Kaby Lake
Coffee Lake 6 cores on mainstream desktop
Amber Lake Mobile-only
Goldmont Plus Goldmont Plus Whiskey Lake Mobile-only
Coffee Lake Refresh 8 cores on mainstream desktop
Comet Lake 10 cores on mainstream desktop
Sunny Cove Cypress Cove (Rocket Lake) Backported Sunny Cove microarchitecture for 14nm
Tremont Tremont 10 nm Skylake Palm Cove (Cannon Lake) Mobile-only
Sunny Cove Sunny Cove (Ice Lake) 512 KB L2-cache/core
Willow Cove (Tiger Lake) Xe graphics engine
Gracemont Gracemont Intel 7
(10nm ESF)		 Golden Cove Golden Cove (Alder Lake) Hybrid, DDR5, PCIe 5.0
Raptor Cove (Raptor Lake)
Crestmont Crestmont Intel 4 Redwood Cove Meteor Lake Mobile-only
NPU, chiplet architecture
Skymont Skymont N3B (TSMC) Lion Cove Lunar Lake Low power mobile only (9-30W)
? (TSMC) Arrow Lake
Darkmont Darkmont 18A Cougar Cove Panther Lake
  • Strike-through indicates cancelled processors
  • Bold names are microarchitectures
  • Italic names are future processors

See also

References

  1. ^ Valich, Theo (2009-04-16). "Intel says no to 28nm, focuses on 22nm: Ivy Bridge/Haswell & Larrabee". Archived from the original on 2011-07-08. Retrieved 23 March 2015.
  2. ^ Smalley, Tim (2007-09-19), Westmere is Nehalem's successor, bit-tech.net
  3. ^ Carry-Less Multiplication and Its Usage for Computing The GCM Mode – Intel Software Network, 2008-04-11, retrieved 2009-03-01
  4. ^ Fuad Abazovic (2008-09-16), Westmere 32nm to improve Nehalem features, Fudzilla.com, retrieved 2009-03-01
  5. ^ "Intel® Developer Zone" (PDF). Retrieved January 16, 2013.[dead link]
  6. ^ "Westmere-EX 10 core CPUs announced by Intel at IDF". TweakTown. September 14, 2010.
  7. ^ Bell, Brandon (2009-02-10), Intel CPU Roadmap 2009–2010, FS Media, Inc, retrieved 2009-03-01
  8. ^ CPU list, archived from the original on 2012-03-01
  9. ^ Westmere-EX: Intel Improves their Xeon Flagship
  10. ^ Intel Launches New Xeon Chips with Up to Ten Cores, archived from the original on 2012-07-17, retrieved 2012-08-20
  11. ^ Hilbert Hagedoorn (March 15, 2011). "Intel ships a 4.4GHz Xeon X5698". The Guru of 3D.
  12. ^ Intel pushes workhorse Xeons to six cores
  13. ^ Intel Xeon X5690 - AT80614005913AB (BX80614X5690)
  14. ^ Intel Launches Its Most Secure Data Center Processor, archived from the original on 2011-09-29, retrieved 2018-11-18
  15. ^ Intel Clarkdale Processor, XTREVIEW, 2009-02-09, retrieved 2009-03-01
  • Official Intel homepage for Westmere-EP
  • Official Intel homepage for Westmere-EX
  • Westmere-EX: A 20 thread server CPU (PDF)
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Related
  • v
  • t
  • e
Intel CPU core roadmaps from P6 to Panther Lake
Atom (ULV) Node name Pentium/Core
Microarch. Step Microarch. Step
600 nm P6 Pentium Pro
(133 MHz)
500 nm Pentium Pro
(150 MHz)
350 nm Pentium Pro
(166–200 MHz)
Klamath
250 nm Deschutes
Katmai NetBurst
180 nm Coppermine Willamette
130 nm Tualatin Northwood
Pentium M Banias NetBurst(HT) NetBurst(×2)
90 nm Dothan Prescott ⇨ Prescott‑2M ⇨ Smithfield
Tejas → ⇩ → Cedarmill (Tejas)
65 nm Yonah Nehalem (NetBurst) Cedar Mill ⇨ Presler
Core Merom 4 cores on mainstream desktop, DDR3 introduced
Bonnell Bonnell 45 nm Penryn
Nehalem Nehalem HT reintroduced, integrated MC, PCH
L3-cache introduced, 256KB L2-cache/core
Saltwell 32 nm Westmere Introduced GPU on same package and AES-NI
Sandy Bridge Sandy Bridge On-die ring bus, no more non-UEFI motherboards
Silvermont Silvermont 22 nm Ivy Bridge
Haswell Haswell Fully integrated voltage regulator
Airmont 14 nm Broadwell
Skylake Skylake DDR4 introduced on mainstream desktop
Goldmont Goldmont Kaby Lake
Coffee Lake 6 cores on mainstream desktop
Amber Lake Mobile-only
Goldmont Plus Goldmont Plus Whiskey Lake Mobile-only
Coffee Lake Refresh 8 cores on mainstream desktop
Comet Lake 10 cores on mainstream desktop
Sunny Cove Cypress Cove (Rocket Lake) Backported Sunny Cove microarchitecture for 14nm
Tremont Tremont 10 nm Skylake Palm Cove (Cannon Lake) Mobile-only
Sunny Cove Sunny Cove (Ice Lake) 512 KB L2-cache/core
Willow Cove (Tiger Lake) Xe graphics engine
Gracemont Gracemont Intel 7
(10nm ESF)		 Golden Cove Golden Cove (Alder Lake) Hybrid, DDR5, PCIe 5.0
Raptor Cove (Raptor Lake)
Crestmont Crestmont Intel 4 Redwood Cove Meteor Lake Mobile-only
NPU, chiplet architecture
Skymont Skymont N3B (TSMC) Lion Cove Lunar Lake Low power mobile only (9-30W)
? (TSMC) Arrow Lake
Darkmont Darkmont 18A Cougar Cove Panther Lake
  • Strike-through indicates cancelled processors
  • Bold names are microarchitectures
  • Italic names are future processors