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Nehalem (microarchitecture)

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Nehalem (Template:IPA-en[1]) is the codename for an Intel processor microarchitecture, successor to the Core microarchitecture.[2] Nehalem processors use the 45 nm process. A preview system with two Nehalem processors was shown at Intel Developer Forum in 2007. The first processor released with the Nehalem architecture was the desktop Core i7,[3] which was released in November 2008.

Nehalem, a recycled codename, refers to a completely different architecture from Netburst, although Nehalem still has some things in common with NetBurst. Nehalem-based microprocessors utilize higher clock speeds and are more energy-efficient than Penryn microprocessors. Hyper-threading is reintroduced along with a reduction in L2, which has been incorporated as L3 Cache which is usable by all cores. Nehalem was replaced with the Sandy Bridge microarchitecture, released in January 2011.

Technology

Microarchitecture of the quad-core implementation

Performance and power improvements

It has been reported that Nehalem has a focus on performance, thus the increased core size.[5] Compared to Penryn, Nehalem has:

  • 10-25% more single-threaded performance / 20-100% more multithreaded performance at the same power level
  • 30% lower power usage for the same performance
  • Nehalem provides a 15–20% clock-for-clock increase in performance per core(average)

Overclocking is possible with Bloomfield processors and the X58 chipset. Lynnfield processors use a PCH removing the need for a northbridge chipset.[6]

Nehalem processors incorporate SSE 4.2 SIMD instructions, adding 7 new instructions to the SSE 4.1 set in the Core 2 series. The Nehalem architecture reduces atomic operation latency by 50% in an attempt to eliminate atomic overhead .[7]

Westmere

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.

Westmere's feature improvements from Nehalem as reported:

  • Native six-core (Gulftown) and ten-core (Westmere-EX) processors.[8]
  • A new set of instructions that gives over 3x the encryption and decryption rate of Advanced Encryption Standard (AES) processes compared to before.[9]
    • 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.[10] 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.[11]
  • 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.

Variants Overview

Processing Cores (interface) Process Die Size CPUID Model Stepping Mobile Desktop, UP Server DP Server MP Server
Eight-Core (Quad-Channel) 45 nm 684 mm² 206E6 46 D0 Beckton (80604)
Quad-Core (Triple-Channel) 45 nm 263 mm² 106A4
106A5
26 C0
D0
Bloomfield (80601) Gainestown (80602)
Quad-Core (Dual-Channel, PCIe) 45 nm 296 mm² 106E4
106E5
30 B0
B1
Clarksfield (80607) Lynnfield (80605) Jasper Forest (80612)
Dual-Core (Dual-Channel, PCIe, Graphics Core) 45 nm Auburndale (canceled) Havendale (canceled)
Ten-Core (Quad-channel)[12] 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)

Nehalem

  • Lynnfield processors feature integrated PCIe 1 x16 or 2 x8.
  • 1 6500 series scalable up to 2 sockets, 7500 series scalable up to 4/8 sockets.[13]

Server / Desktop Processors

Codename Market Cores /
Threads
Socket Processor
Branding & Model
CPU
Clock rate
Turbo TDP Interfaces L3
cache
Release Date Price for
1k Unit
Chipset Memory
Beckton1 MP Server /
DP Server
8 (16) LGA
1567
Xeon [14] X7560 2.26 GHz Yes 130 W QPI 6.4 GT/s DDR3-800 /
1066
(Up to 4x with
SMB-Ready
Motherboard)
24 MB 2010-03-30[15] $3692
X7550 2.0 GHz 18 MB $2837
X6550 $2461
L7555 1.86 GHz 95 W 4× QPI 5.86 GT/s 24 MB $3157
6 (12) E7540 2.0 GHz 105 W 4× QPI 6.4 GT/s 18 MB $1980
E6540 12 MB $1712
E7530 1.86 GHz 4× QPI 5.86 GT/s $1391
L7545 18 MB $2087
6 (6) X7542 2.66 GHz 130 W $1980
4 (8) E7520 1.86 GHz No 105 W 4× QPI 4.8 GT/s $856
E6510 1.73 GHz 12 MB $744
Gainestown DP Server[16] 4 (8) LGA
1366
Xeon[17] W5590 3.33 GHz Yes 130 W 2× QPI 6.4 GT/s DDR3-13331 8 MB 2009-08-09 $1600
W5580 3.2 GHz 2009-03-29[18] $1500
X5570 2.93 GHz 95 W $1286
X5560 2.8 GHz $1072
X5550 2.66 GHz $858
E5540 2.53 GHz 80 W 2× 5.86 GT/s 3× DDR3-10661 $744
E5530 2.4 GHz $530
E5520 2.26 GHz $373
L5530 2.4 GHz 60 W 2009-08-09 $744
L5520 2.26 GHz 2009-03-30 $530
L5518 2.13 GHz $
4 (4) E5507 2.26 GHz No 80 W 2× 4.8 GT/s 3× DDR3-8001 4 MB 2010-03-16 $266
E5506 2.13 GHz 2009-03-29
L5506 2.13 GHz 60 W $423
E5504 2.0 GHz 80 W $224
2 (4) L5508 2.0 GHz Yes 38 W 2× 5.86 GT/s 3× DDR3-1066 8 MB $
2 (2) E5503 2.0 GHz No 80 W 2× 4.8 GT/s 3× DDR3-800 4 MB 2010-03-16 $224
E5502 1.86 GHz 2009-03-29 $188
Bloomfield UP Server[19] 4 (8) Xeon[20] W3580 3.33 GHz Yes 130 W 1× QPI 6.4 GT/s 3× DDR3-1333 8 MB 2009-08-09 $999
W3570 3.2 GHz 2009-03-29[20]
W3565 3.2 GHz 1× QPI 4.8 GT/s 3× DDR3-1066 2009-11-01 $562
W3550 3.06 GHz 2009-08-09
W3540 2.93 GHz 2009-03-29[20]
W3530 2.8 GHz 2010-03-16 $294
W3520 2.66 GHz 2009-03-29[20] $284
2(2) W3505 2.53 GHz No 4 MB $
W3503 2.4 GHz $
Lynnfield 4 (8) LGA
1156
X3480 3.06 GHz Yes 95 W DMI 2× DDR3-1333 8 MB 2010-05-30 $612
X3470 2.93 GHz 2009-09-08 $589
X3460 2.8 GHz $316
X3450 2.66 GHz $241
X3440 2.53 GHz $215
L3426 1.86 GHz 45 W $284
4 (4) X3430 2.4 GHz 95 W $189
Bloomfield Enthusiast
Desktop[21]
4 (8) LGA
1366
Core i7
Extreme
975[22] 3.33 GHz Yes 130 W 1× QPI 6.4 GT/s 3× DDR3-1066 2009-05-31 $999
965 3.2 GHz 2008-11-17
Core i7 960[23] 3.2 GHz 1× QPI 4.8 GT/s 2009-10-20 $562
950[22] 3.06 GHz 2009-05-31
940 2.93 GHz 2008-11-17
930 2.8 GHz 2010-02-28 $294
920 2.66 GHz 2008-11-17 $284
Lynnfield Performance
Desktop
LGA
1156
880 3.06 GHz Yes 95 W DMI 2× DDR3-1333 2010-05-30 $583
875K 2.93 GHz $342
870[24] 2009-09-08 $562
870S 2.66 GHz 82 W 2010-07-19 $351
860 2.8 GHz 95 W 2009-09-08 $284
860S 2.53 GHz 82 W 2010-01-07 $337
4 (4) Core i5 760 2.8 GHz 95 W 2010-07-17 $209
750[25] 2.66 GHz 95 W 2009-09-08 $196
750S 2.4 GHz 82 W 2010-01-07 $259
  • Intel states the Gainestown processors have six memory channels. Gainestown processors have dual QPI links and have a separate set of memory registers for each link in effect, a multiplexed six-channel system.[26][27]

Mobile Processors

Codename Market Cores /
Threads
Socket Processor
Branding & Model
Core
Clock rate
Turbo TDP L3
cache
Interface Release Date Price for
1k Unit
Clarksfield Extreme /
Performance
Mobile
4 (8) µPGA
988
Core i7
Extreme
940XM 2.13 GHz Yes 55 W 8 MB * DMI
* 2x DDR3-1333
* PCIe 1 x16 / 2 x8
2010-06-21 $1096
920XM 2.0 GHz 2009-09-23 $1054
Core i7 840QM 1.86 GHz 45 W 2010-06-21 $568
820QM 1.73 GHz 2009-09-23 $546
740QM 6 MB 2010-06-21 $378
720QM 1.6 GHz 2009-09-23 $364

Westmere

  • TDP includes the integrated GPU, if present.
  • Clarkdale processors feature an integrated PCIe 1 x16.
  • Clarkdale and Arrandale contain the 32 nm dual core processor Hillel and the 45 nm integrated graphics device Ironlake, and support switchable graphics.[28][29]

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 MP Server 10 (20) LGA
1567
Xeon E7-4870 2.4 GHz Yes 130 W 2× QPI 6.4 GT/s 30 MB 2011-04-05
[30]
$4394
E7-4860 2.26 GHz 24 MB $3838
E7-4850 2 GHz $2837
Gulftown /
Westmere-EP

[31]
DP Server 6 (12) LGA
1366
Xeon X5690 3.46 GHz Yes 130 W 2× QPI 6.4 GT/s 3× DDR3-1333 12 MB 2011-02-13 $1663
X5680 3.33 GHz 2010-03-16
X5675 3.06 GHz 95 W 2011-02-05 $1440
X5670 2.93 GHz 2010-03-16 $1440
X5660 2.8 GHz $1219
X5650 2.66 GHz $996
E5645 2.4 GHz 80 W 2× QPI 5.86 GT/s $958
L5640 2.26 GHz 60 W $996
L5638 2.0 GHz $958
4 (8) X5677 3.46 GHz 130 W 2× QPI 6.4 GT/s $1663
X5667 3.06 GHz 95 W $1440
E5640 2.66 GHz 80 W 2× QPI 5.86 GT/s 3× DDR3-1066 $774
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
UP Server 6 (12) Xeon W3680 3.33 GHz Yes 130 W 1× QPI 6.4 GT/s DDR3-1333 2010-03-16[32] $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[33] UP Server 2 (4) LGA
1156
Xeon L3406 2.26 GHz Yes 30 W DMI 2× DDR3-1066 4 MB 2010-03-16 $189
L3403 2.0 GHz 2010-10 $
Mainstream /
Value
Desktop
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
650 3.2 GHz $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 G6950 2.8 GHz 533 MHz 2× DDR3-1066 3 MB $87
Celeron G1101 2.26 GHz 2 MB OEM

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 3.47/3.2 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 3.33/3.2 GHz 2010-01-07 $332
610E 2.53 GHz 3.2/2.93 GHz OEM
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 1.33 GHz 2.4/2.0  GHz 2010-05-25 $289
640UM 1.2 GHz 2.26/1.87 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 2.66 GHz 3.2/2.93 GHz $260
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 $250
520UM 1.06 GHz 1.86/1.6 GHz 2010-01-07 $241
480M 2.67 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 1.73/1.47 GHz 2010-05-25
Core i3 380M 2.54 GHz n/a 667 MHz No 35 W 2× DDR3-1066 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 P6200 2.13 GHz 667 MHz 35 W 2× DDR3-1066 2010-09-26
P6100 2.00 GHz
P6000 1.86 GHz 2010-06-20
U5400 1.20 GHz 500 MHz 18 W 2× DDR3-800 2010-05-25
Celeron P4600 2.00 GHz 667 MHz 35 W 2× DDR3-1066 2 MB 2010-09-26 $86
P4500 / P4505 1.86 GHz 2010-03-28 OEM
U3400 / U3405 1.06 GHz 500 MHz 18 W 2× DDR3-800 / 1066 2010-05-25

Successor

The successor to Nehalem and Westmere is Sandy Bridge.

References

  1. ^ I Am Nehalem
  2. ^ Intel Details Upcoming New Processor Generations, Intel Corporation, 2007-03-28
  3. ^ Gruener, Wolfgang (2008-08-10), Nehalem = i7: Intel unveils new Core processor brand, TG Daily
  4. ^ QInside Nehalem: Intel's Future Processor and System
  5. ^ "Intel's dual teamed approached to micro-architecture development", PC Watch (in Japanese), 2008-01-29
  6. ^ Botezatu, Bogdan (2008-04-22), Intel: No Overclocking for Mainstream Nehalems, Softpedia
  7. ^ NO EXECUTE!
  8. ^ Intel says no to 28nm, focuses on 22nm: Ivy Bridge/Haswell & Larrabee
  9. ^ Smalley, Tim (2007-09-19), Westmere is Nehalem's successor, bit-tech.net
  10. ^ Carry-Less Multiplication and Its Usage for Computing The GCM Mode – Intel Software Network, 2008-04-11, retrieved 2009-03-01
  11. ^ Fuad Abazovic (2008-09-16), Westmere 32nm to improve Nehalem features, Fudzilla.com, retrieved 2009-03-01
  12. ^ Westmere-EX 10 core CPUs announced by Intel at IDF
  13. ^ High-End x86: The Nehalem EX Xeon 7500 and Dell R810
  14. ^ AMD launches 12-core Opteron server chips, Intel counters with the 8-core Xeon 7500, engadedget.com, 2010-03-31, retrieved 2010-03-31
  15. ^ Nebojsa Novakovic (2009-02-12), Intel's next bunch of fun CPUs moves to 2010, CNN International, retrieved 2009-03-01
  16. ^ Intel Xeon Processor 5500 Series Product brief, (Document Number: 321579-001US) (PDF), Intel, 2009-04-01, retrieved 2010-08-27
  17. ^ Core i7 to make leap to Xeon in early 2009, Legacy.macnn.com, retrieved 2008-11-24
  18. ^ Fuad Abazovic (2009-01-28), Nehalem based Xeon comes Mar 29th, Fudzilla.com, retrieved 2009-01-28
  19. ^ Intel Xeon Processor 3500 Series, Intel, 2009-04-01, retrieved 2009-04-10
  20. ^ a b c d Teglet, Traian (2008-11-13), Intel to Add New Nehalem Xeon Processor, softpedia, retrieved 2008-11-13 Cite error: The named reference "Intel to Add New Nehalem Xeon Processor" was defined multiple times with different content (see the help page).
  21. ^ "Intel Core i7 Processor Extreme Datasheet, Volume 2, (Document Number: 320835-002)" (PDF). Intel. 2008-11-01. Retrieved 2009-03-24.
  22. ^ a b Worrel, Jon (2009-02-09), Core i7 950 and 975 to replace 940 and 965, Fudzilla, retrieved 2009-02-10
  23. ^ Intel to launch new Core i7 960 and Celerons
  24. ^ Intel Core i5-750, AnandTech, 2009-06-17
  25. ^ Intel Quietly Announces Core i5, Xtreview, 2009-06-26
  26. ^ Intel Xeon Processor 5000 SequenceTechnical Documents
  27. ^ Intel Xeon Processor 5500 Series Datasheet Volume 2 (PDF), Intel, March 2009, retrieved 2009-05-01
  28. ^ Bell, Brandon (2009-02-10), Intel CPU Roadmap 2009–2010, FS Media, Inc, retrieved 2009-03-01
  29. ^ CPU list
  30. ^ Intel Launches New Xeon Chips with Up to Ten Cores
  31. ^ Intel pushes workhorse Xeons to six cores
  32. ^ Intel Launches Its Most Secure Data Center Processor
  33. ^ Intel Clarkdale Processor, XTREVIEW, 2009-02-09, retrieved 2009-03-01

Further reading