Westmere (formerly Nehalem-C) is a CPU microarchitecture developed by Intel. It is a scaled-down version of its predecessor, Nehalem, and shares the same CPU sockets with it. Some Westmere models have integrated graphics processors, branded as Intel HD Graphics, that support DirectX 10.1 and OpenGL 2.1 API.

The first Westmere-based processors were released on January 7, 2010. They were labeled under Intel's Core, Pentium, Celeron, and Xeon brandings.

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

Native six-core (Gulftown) and ten-core (Westmere-EX) processors. AES-NI instruction set support: Out of the total seven new instructions, six implement the AES algorithm specifically, the remaining PCLMULQDQ instruction (see CLMUL instruction set) accelerates carry-less multiplication for use in cryptography and data compression. Integrated graphics, fabricated on a separate die using 45 nm process, and added onto the processor package, beside the CPU die, (for dual core Arrandale and Clarkdale only). Improved virtualization latency and support for VMX Unrestricted mode, allowing 16-bit guests to run in real mode and big real mode. Support for "Huge Pages" of 1 GB in size.

+ Translation lookaside buffer sizes 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(memory interface) Process Die size CPUID Model Stepping Mobile Desktop,UP server DP server MP server Ten-Core(Quad-channel) 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 nm45 nm (Integrated Graphics) 114 mm2+81 mm2 2065220655 37 C2K0 Arrandale(80617) Clarkdale(80616)

Westmere CPUs

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. Only certain higher-end CPUs support AES-NI and 1GB Huge Pages.

Server / Desktop processors

Codename Market Cores /threads Socket Processorbranding & model Clock rate Turbo TDP Interfaces L3cache Releasedate Price Core GPU Chipset Memory Westmere-EX MP Server 10 (20) LGA1567 Xeon E7-8870 2.4 GHz rowspan=18 rowspan=16 130 W 4× QPI 6.4 GT/s 4× DDR3-1066 30 MB 2011-04-05 $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 rowspan=2 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) LGA1366 Xeon X5698 4.4 GHz rowspan=28 130 W 2× QPI 6.4 GT/s 3× DDR3-1333 12 MB Q1 2011 OEM 6 (12) X5690 3.46 GHz rowspan=23 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 rowspan=4 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 $188Gulftown UP Server 6 (12) Xeon W3690 3.46 GHz rowspan=7 rowspan=7 130 W 1× QPI 6.4 GT/s 3× DDR3-1333 12 MB 2011-02-13 $999 W3680 3.33 GHz 2010-03-16 $999 W3670 3.20 GHz 1× QPI 4.8 GT/s 3× DDR3-1066 2010-08-29 $885Extreme /PerformanceDesktopCore i7Extreme 990X 3.46 GHz 1× QPI 6.4 GT/s 2011-02-13 $999 980X3.33 GHz 2010-03-16Core i7 9801× QPI 4.8 GT/s 2011-06-26 $583 970 3.20 GHz 2010-07-17 $583 Clarkdale UP Server 2 (4) LGA1156 Xeon L3406 2.26 GHz rowspan=2 rowspan=8 30 W DMI 2× DDR3-1066 4 MB 2010-03-16 $189 2 (2) L3403 2.0 GHz 2010-10 OEM Mainstream /ValueDesktop 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 rowspan=8 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 ProcessorBranding & model Core GPU Turbo TDP Chipset Memory L3cache ReleaseDate Price Clock rate Interfaces

Mobile processors

Codename Market Cores /threads Processorbranding & model CPU Clock rate GPU clock rate Turbo TDP Memory L3cache Interface Releasedate 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 rowspan=23 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 rowspan=17 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 List of Intel CPU microarchitectures Tick-Tock model

References

External links Official Intel homepage for Westmere-EP Official Intel homepage for Westmere-EX Westmere-EX: A 20 thread server CPU (PDF)