Nehalem (microarchitecture)

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Nehalem
Intel Nehalem.jpg
L1 cache64 KB per core
L2 cache256 KB per core
L3 cache4 MB to 12 MB shared
PredecessorCore (tock)
Penryn (tick)
SuccessorWestmere (tick)
Sandy Bridge (tock)
Socket(s)
 
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For other uses, see Nehalem (disambiguation).
Nehalem
Intel Nehalem.jpg
L1 cache64 KB per core
L2 cache256 KB per core
L3 cache4 MB to 12 MB shared
PredecessorCore (tock)
Penryn (tick)
SuccessorWestmere (tick)
Sandy Bridge (tock)
Socket(s)

Nehalem /nəˈhləm/[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" is a recycled Intel codename and namesake of the Nehalem River.[4][5] It is an architecture that differs radically from Netburst, while retaining some of the latter's minor features. Nehalem-based microprocessors use higher clock speeds and are more energy-efficient than Penryn microprocessors. Hyper-threading is reintroduced, along with a reduction in L2 cache size, as well as an enlarged L3 cache that is shared by all cores. Nehalem was replaced with the Sandy Bridge microarchitecture, released in January 2011.

Technology[edit]

Microarchitecture of a processor core in the quad-core implementation
Translation lookaside buffer sizes[7]
CachePage Size
NameLevel4 KB2 MB
DTLB1st6432
ITLB1st1287 / logical core
STLB2nd512none

Performance and power improvements[edit]

It has been reported that Nehalem has a focus on performance, thus the increased core size.[8] Compared to Penryn, Nehalem has:

Overclocking is possible with Bloomfield processors and the X58 chipset. Lynnfield processors use a PCH removing the need for a northbridge chipset.[9]

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 .[10]

Variants Overview[edit]

Processing Cores (interface)ProcessDie SizeCPUIDModelSteppingMobileDesktop, UP ServerDP ServerMP Server
Eight-Core (Quad-Channel)45 nm684 mm²206E646D0Beckton (80604)
Quad-Core (Triple-Channel)45 nm263 mm²106A4
106A5
26C0
D0
Bloomfield (80601)Gainestown (80602)
Quad-Core (Dual-Channel, PCIe)45 nm296 mm²106E4
106E5
30B0
B1
Clarksfield (80607)Lynnfield (80605)Jasper Forest (80612)
Dual-Core (Dual-Channel, PCIe, Graphics Core)45 nmAuburndale (canceled)Havendale (canceled)


Server and desktop processors[edit]

CodenameMarketCores /
Threads
SocketProcessor
Branding & Model
CPU
Clock rate
TurboTDPInterfacesL3
cache
Release DatePrice for
1k Unit
ChipsetMemory
Beckton1MP Server /
DP Server
8 (16)LGA
1567
Xeon [12]X75602.26 GHzYes130 WQPI 6.4 GT/sDDR3-800 /
1066
(Up to 4x with
SMB-Ready
Motherboard)
24 MB2010-03-30[13]$3692
X75502.0 GHz18 MB$2837
X6550$2461
L75551.86 GHz95 W4× QPI 5.86 GT/s24 MB$3157
6 (12)E75402.0 GHz105 W4× QPI 6.4 GT/s18 MB$1980
E654012 MB$1712
E75301.86 GHz4× QPI 5.86 GT/s$1391
L754518 MB$2087
6 (6)X75422.66 GHz130 W$1980
4 (8)E75201.86 GHzNo105 W4× QPI 4.8 GT/s$856
E65101.73 GHz12 MB$744
GainestownDP Server[14]4 (8)LGA
1366
Xeon[15]W55903.33 GHzYes130 W2× QPI 6.4 GT/sDDR3-133318 MB2009-08-09$1600
W55803.2 GHz2009-03-29[16]$1500
X55702.93 GHz95 W$1286
X55602.8 GHz$1072
X55502.66 GHz$858
E55402.53 GHz80 W2× 5.86 GT/s3× DDR3-10661$744
E55302.4 GHz$530
E55202.26 GHz$373
L55302.4 GHz60 W2009-08-09$744
L55202.26 GHz2009-03-30$530
L55182.13 GHz$
4 (4)E55072.26 GHzNo80 W2× 4.8 GT/s3× DDR3-80014 MB2010-03-16$266
E55062.13 GHz2009-03-29
L55062.13 GHz60 W$423
E55042.0 GHz80 W$224
2 (4)L55082.0 GHzYes38 W2× 5.86 GT/s3× DDR3-10668 MB$
2 (2)E55032.0 GHzNo80 W2× 4.8 GT/s3× DDR3-8004 MB2010-03-16$224
E55021.86 GHz2009-03-29$188
Jasper Forest4 (8)EC55492.53 GHzYes85 W1× 5.86 GT/s3× DDR3-13338 MB2010-02-11$530
LC55282.13 GHz60 W1× 4.8 GT/s3× DDR3-1066$519
LC55181.73 GHz48 W
4 (4)EC55092 GHzNo85 W$265
2 (4)EC55392.27 GHz65 W1× 5.86 GT/s3× DDR3-13334 MB$387
BloomfieldUP Server[17]4 (8)Xeon[18]W35803.33 GHzYes130 W1× QPI 6.4 GT/s3× DDR3-13338 MB2009-08-09$999
W35703.2 GHz2009-03-29[18]
W35653.2 GHz1× QPI 4.8 GT/s3× DDR3-10662009-11-01$562
W35503.06 GHz2009-08-09
W35402.93 GHz2009-03-29[18]
W35302.8 GHz2010-03-16$294
W35202.66 GHz2009-03-29[18]$284
2 (2)W35052.53 GHzNo4 MB$
W35032.4 GHz$
Jasper Forest4 (4)EC35392.13 GHz65 WDMI8 MB2010-02-11$302
2 (4)LC35281.73 GHzYes35 W3× DDR3-8004 MB
1 (1)LC3518No23 W2 MB$192
Lynnfield4 (8)LGA
1156
X34803.06 GHzYes95 WDMI2× DDR3-13338 MB2010-05-30$612
X34702.93 GHz2009-09-08$589
X34602.8 GHz$316
X34502.66 GHz$241
X34402.53 GHz$215
L34261.86 GHz45 W$284
4 (4)X34302.4 GHz95 W$189
BloomfieldEnthusiast
Desktop[19]
4 (8)LGA
1366
Core i7
Extreme
975[20]3.33 GHzYes130 W1× QPI 6.4 GT/s3× DDR3-10662009-05-31$999
9653.2 GHz2008-11-17
Core i7960[21]3.2 GHz1× QPI 4.8 GT/s2009-10-20$562
950[20]3.06 GHz2009-05-31
9402.93 GHz2008-11-17
9302.8 GHz2010-02-28$294
9202.66 GHz2008-11-17$284
LynnfieldPerformance
Desktop
LGA
1156
8803.06 GHzYes95 WDMI2× DDR3-13332010-05-30$583
875K2.93 GHz$342
870[22]2009-09-08$562
870S2.66 GHz82 W2010-07-19$351
8602.8 GHz95 W2009-09-08$284
860S2.53 GHz82 W2010-01-07$337
4 (4)Core i57602.8 GHz95 W2010-07-17$209
750[23]2.66 GHz95 W2009-09-08$196
750S2.4 GHz82 W2010-01-07$259
Jasper ForestEmbedded
Desktop
1 (2)LGA
1366
CeleronP10531.33 GHzNo30 W3× DDR3-8002 MB02-12-2010$160

Mobile processors[edit]

CodenameMarketCores /
Threads
SocketProcessor
Branding & Model
Core
Clock rate
TurboTDPL3
cache
InterfaceRelease DatePrice for
1k Unit
ClarksfieldExtreme /
Performance
Mobile
4 (8)µPGA
988
Core i7
Extreme
940XM2.13 GHzYes55 W8 MB* DMI
* 2x DDR3-1333
* PCIe 1 x16 / 2 x8
2010-06-21$1096
920XM2.0 GHz2009-09-23$1054
Core i7840QM1.86 GHz45 W2010-06-21$568
820QM1.73 GHz2009-09-23$546
740QM6 MB2010-06-21$378
720QM1.6 GHz2009-09-23$364

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]

  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. ^ Ian, King (2008-10-20), Intel's new faster chip right on AMD's heels, The Seattle Times 
  5. ^ Jones, George (2008-02-09), IAMD vs Intel: The future of desktop CPUs, PC Advisor UK 
  6. ^ QInside Nehalem: Intel's Future Processor and System
  7. ^ [1]
  8. ^ "Intel's dual teamed approached to micro-architecture development", PC Watch (in Japanese), 2008-01-29 
  9. ^ Botezatu, Bogdan (2008-04-22), Intel: No Overclocking for Mainstream Nehalems, Softpedia 
  10. ^ NO EXECUTE! 
  11. ^ High-End x86: The Nehalem EX Xeon 7500 and Dell R810
  12. ^ AMD launches 12-core Opteron server chips, Intel counters with the 8-core Xeon 7500, engadedget.com, 2010-03-31, retrieved 2010-03-31 
  13. ^ Nebojsa Novakovic (2009-02-12), Intel's next bunch of fun CPUs moves to 2010, CNN International, retrieved 2009-03-01 
  14. ^ Intel Xeon Processor 5500 Series Product brief, (Document Number: 321579-001US), Intel, 2009-04-01, retrieved 2010-08-27 
  15. ^ Core i7 to make leap to Xeon in early 2009, Legacy.macnn.com, retrieved 2008-11-24 
  16. ^ Fuad Abazovic (2009-01-28), Nehalem based Xeon comes Mar 29th, Fudzilla.com, retrieved 2009-01-28 
  17. ^ Intel Xeon Processor 3500 Series, Intel, 2009-04-01, retrieved 2009-04-10 
  18. ^ a b c d Teglet, Traian (2008-11-13), Intel to Add New Nehalem Xeon Processor, softpedia, retrieved 2008-11-13 
  19. ^ "Intel Core i7 Processor Extreme Datasheet, Volume 2, (Document Number: 320835-002)". Intel. 2008-11-01. Retrieved 2009-03-24. 
  20. ^ a b Worrel, Jon (2009-02-09), Core i7 950 and 975 to replace 940 and 965, Fudzilla, retrieved 2009-02-10 
  21. ^ Intel to launch new Core i7 960 and Celerons 
  22. ^ Intel Core i5-750, AnandTech, 2009-06-17 
  23. ^ Intel Quietly Announces Core i5, Xtreview, 2009-06-26 
  24. ^ Intel Xeon Processor 5000 SequenceTechnical Documents 
  25. ^ Intel Xeon Processor 5500 Series Datasheet Volume 2, Intel, March 2009, retrieved 2009-05-01 

Further reading[edit]

External links[edit]