Westmere (microarchitecture)
CPU microarchitecture by Intel From Wikipedia, the free encyclopedia
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.
![]() Intel Core i7-970 | |
General information | |
---|---|
Launched | January 7, 2010 |
Performance | |
Max. CPU clock rate | 1.06 GHz to 3.46 GHz |
QPI speeds | 4.80 GT/s to 6.40 GT/s |
DMI speeds | 2.50 GT/s |
Cache | |
L1 cache | 64 KB per core |
L2 cache | 256 KB per core |
L3 cache | 2 MB to 30 MB shared |
Architecture and classification | |
Microarchitecture | Nehalem |
Instruction set | x86-16, IA-32, x86-64 |
Extensions | |
Physical specifications | |
Transistors |
|
Cores |
|
GPUs | 533 MHz to 900 MHz 177M 45nm (K0) |
Sockets | |
Products, models, variants | |
Model |
|
History | |
Predecessor | Nehalem |
Successor | Sandy Bridge |
Support status | |
Unsupported |

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, and includes directX 10.1, and openGL 2.1.
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]
- 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 and data compression.[3]
- 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.
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
Summarize
Perspective

- 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.
See also
References
External links
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