Westmere (microarchitecture)

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Westmere
L1 cache 64 KB per core
L2 cache 256 KB per core
L3 cache 4 MB to 30 MB shared
GPU 533 MHz to 900 MHz
177M 45nm (K0)
Predecessor Nehalem
Successor Sandy Bridge
Socket(s)
Connection of the GPU inside the Westemere microarchitecture

Westmere (formerly Nehalem-C) is the name given to the 32 nm die shrink of Nehalem. The first Westmere-based processors were launched on January 7, 2010 by Intel Corporation.

Technology[edit]

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) that will be used by the AES algorithm. Also an instruction called PCLMULQDQ (see CLMUL instruction set) that will perform carry-less multiplication for use in cryptography.[3] These instructions will allow the processor to perform hardware-accelerated encryption, not only resulting in faster execution but also protecting against software targeted attacks.
  • 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 N/A
ITLB 1st 128 7 / logical core N/A
STLB 2nd 512 none none

CPU variants[edit]

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 206C2 44 B1 Gulftown (80613) Westmere-EP (80614)
Dual-Core (Dual-Channel, PCIe, Graphics Core) 32 nm
45 nm
81+114 mm² 20652
20655
37 C2
K0
Arrandale (80617) Clarkdale (80616)

Westmere CPUs[edit]

  • TDP includes the integrated GPU, if present.
  • Clarkdale processors feature an integrated PCIe 1 ×16.
  • 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]

Server / Desktop processors[edit]

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 N/A 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
Gulftown /
Westmere-EP
[11]
DP Server 2 (4) LGA
1366
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
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
X5649 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
L5607 2.26 GHz 80 W 8 MB 2011-02-13 $276
L5606 2.13 GHz $219
L5603 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 DDR3-1333 12 MB 2011-02-13[12] $999
W3680 3.33 GHz 2010-03-16[13] $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[14] UP Server 2 (4) LGA
1156
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 $
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

Mobile processors[edit]

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[edit]

The main article for this category is Intel Tick-Tock.

The successor to Nehalem and Westmere is Sandy Bridge.

See also[edit]

References[edit]

External links[edit]