Intel Core i7-640LM

Intel 640LM

The Intel Core i7-640LM is a fast middle class low voltage dual core CPU for laptops and clocks (due to the Turbo Mode) from 2.16 to 2.93 GHz. Each core is based on the Nehalem (Westmere) micro-architecture. Hyperthreading enables the Dual Core CPU to handle 4 threads at once (for a better usage of the pipeline). Compared to the Core i7-620M, the 640LM is slower but more power efficient.

A feature of the new Core i7-640LM is the integrated graphics card (called Intel HD Graphics) and memory controller. Both are on a separate die that is still manufactured in 45nm whereas the CPU die is already manufactured in the new 32nm process.

Due to the integrated memory controller, the HyperThreading and Turbo Boost, the  Core i5-640LM is faster than a similar clocked Core 2 Duo in all (us known) applications and benchmarks. The performance should be somewhere on the level of the Core i5-430M. Beware, that some designs may not feature the Turbo Boost or due to small cooling solutions, the TurboBoost may not trigger very often. Therefore, the performance could be worse.

The 32nm cpu cores of the Westmere generation can also process some new instructions to accelerate AES encryptions. Modern applications that support AES encoding can profit significantly using the new instructions (e.g. the Communications Suite test in the PCMark Vantage boosts up to 70% using AES in the faster Core i5-520M).

The integrated Intel Graphics Media Accelerator HD (GMA HD) graphics card is between 266-566 MHz (Turbo Boost) and therefore the base speed is clearly below the non low voltage versions. The performance should still be a lot faster than the old GMA 4500MHD.

The power consumption of 25 Watt TDP (max.) counts for the whole package and therefore it is clearly better than the 25 Watt TDP of the Core 2 Duo P-series (CPU alone).

SeriesIntel Core i7
CodenameArrandale
Clock Rate2130 - 2933 MHz
Front Side Bus2500 MHz
Level 2 Cache512 KB
Level 3 Cache4096 KB
Number of Cores / Threads2 / 4
Max. Power Consumption (TDP = Thermal Design Power)25 Watt
Transistor Count382+177 Million
Manufacturing Technology32 nm
Die Size81+177 mm2
Max. Temperature105 °C
SocketBGA1288
FeaturesTurbo Boost (2.93 GHz max), Hyper Threading, Enhanced Speedstep, integrated GMA HD 266-566MHz
64 Bit64 Bit support
Hardware VirtualizationVT-x, VT-d
Starting Price $332 U.S.
Announcement Date01/04/2010
Product Link (external)Intel Core i7 640LM

CPU Benchmarks

wPrime 2.0x: 1024m
0% 100%
min: 667.7     avg: 1036.5 (89.12%)     max: 1405.204 seconds*
wPrime 2.0x: 32m
0% 100%
min: 20.96     avg: 21.4 (96.57%)     max: 21.9 seconds*
3DMark 06 - CPU:
0% 100%
min: 2496     avg: 2539 (27.03%)     max: 2582 Points
PCMark 05: Standard 1024x768
0% 100%
min: 5734     avg: 5734 (33.07%)     max: 5734 Points
Cinebench R11.5: CPU Multi 64Bit
0% 100%
min: 1.88     avg: 1.9 (9.55%)     max: 1.88 Points
Cinebench R10: Rendering Single CPUs 64Bit
0% 100%
min: 3869     avg: 3869 (15.5%)     max: 3869 Points
Cinebench R10: Rendering Multiple CPUs 64Bit
0% 100%
min: 7205     avg: 7205 (17.99%)     max: 7205 Points
Cinebench R10: Rendering Single 32Bit
0% 100%
min: 2980     avg: 3053.5 (44.7%)     max: 3127 Points
Cinebench R10: Rendering Multiple CPUs 32Bit
0% 100%
min: 5869     avg: 5956 (17.13%)     max: 6043 Points
Super Pi mod 1.5 XS 1M:
0% 100%
min: 14     avg: 14.5 (98.79%)     max: 15 Seconds*
Super Pi mod 1.5 XS 2M:
0% 100%
min: 37     avg: 37 (99.31%)     max: 37 Seconds*
Super Pi Mod 1.5 XS 32M:
0% 100%
min: 869     avg: 877.5 (96.16%)     max: 886 Seconds*
Windows 7 Experience Index: Processor
0% 100%
min: 6.4     avg: 6.5 (79.37%)     max: 6.6 points
- Range of benchmarks for this CPU
- Average benchmark score

Cinebench R10 in comparison
Intel Atom Z670 (min)
691 
...
Intel Core i3 350M
5826.4 
Intel Core 2 Duo (Desktop) E6850
5830 
Intel Core 2 Duo T9600
5936 
Intel Core i7 640LM
5956 
Intel Core 2 Extreme X9000
6083.7 
Intel Core 2 Duo P9700
6143 
AMD A-Series A8-3510MX
6158 
...
Intel Xeon (Desktop) E5-2697 v2 (max)
34776 

Reviews for the Intel Core i7 640LM processor

HP EliteBook 2540p (Intel Graphics Media Accelerator (GMA) HD Graphics, 12.1")
» Review HP EliteBook 2540p Subnotebook - Review
» HP EliteBook 2540p - External Review

HP EliteBook 2540p-WK302EA (Intel Graphics Media Accelerator (GMA) HD Graphics, 12.1")
» HP EliteBook 2540p-WK302EA - External Review

HP EliteBook 2540p-WK304EA (Intel Graphics Media Accelerator (GMA) HD Graphics, 12.1")
» HP EliteBook 2540p-WK304EA - External Review

Lenovo ThinkPad X201s (Intel Graphics Media Accelerator (GMA) HD Graphics, 12.1")
» Lenovo ThinkPad X201s - External Review

Lenovo Thinkpad X201s 5143-4JG (Intel Graphics Media Accelerator (GMA) HD Graphics, 12.1")
» Review Lenovo Thinkpad X201s Notebook - Review
» Lenovo Thinkpad X201s 5143-4JG - External Review

» Mobile CPU Comparison
Comparison of all mobile CPU series

» Mobile Processors - Benchmarklist
Benchmarklist of all known CPUs that are used in laptops (desktop and laptop CPUs)

Other CPUs of the series Intel Core i7

» Intel Core i7 4940MX
   3.1 GHz / 1 MB + 8 MB
» Intel Core i7 4930MX
   3 GHz / 1 MB + 8 MB
» Intel Core i7 4910MQ
   2.9 GHz / 1 MB + 8 MB
» Intel Core i7 3940XM
   3 GHz / 1 MB + 8 MB
» Intel Core i7 4900MQ
   2.8 GHz / 1 MB + 8 MB
» Intel Core i7 4960HQ
   2.6 GHz / 1 MB + 6 MB
» Intel Core i7 4810MQ
   2.8 GHz / 1 MB + 6 MB
» Intel Core i7 3920XM
   2.9 GHz / 1 MB + 8 MB
» Intel Core i7 4800MQ
   2.7 GHz / 1 MB + 6 MB
» Intel Core i7 4950HQ
   2.4 GHz / 1 MB + 6 MB
» Intel Core i7 4860HQ
   2.4 GHz / 1 MB + 6 MB
» Intel Core i7 3840QM
   2.8 GHz / 1 MB + 8 MB
» Intel Core i7 4850HQ
   2.3 GHz / 1 MB + 6 MB
» Intel Core i7 4710HQ
   2.5 GHz / 1 MB + 6 MB
» Intel Core i7 4710MQ
   2.5 GHz / 1 MB + 6 MB
» Intel Core i7 3820QM
   2.7 GHz / 1 MB + 8 MB
» Intel Core i7 3740QM
   2.7 GHz / 1 MB + 6 MB
» Intel Core i7 3720QM
   2.6 GHz / 1 MB + 6 MB
» Intel Core i7 4700HQ
   2.4 GHz / 1 MB + 6 MB
» Intel Core i7 4700MQ
   2.4 GHz / 1 MB + 6 MB
» Intel Core i7 4760HQ
   2.1 GHz / 1 MB + 6 MB
» Intel Core i7 2960XM
   2.7 GHz / 1 MB + 8 MB
» Intel Core i7 4712HQ
   2.3 GHz / 1 MB + 6 MB
» Intel Core i7 4712MQ
   2.3 GHz / 1 MB + 6 MB
» Intel Core i7 4750HQ
   2 GHz / 1 MB + 6 MB
» Intel Core i7 3635QM
   2.4 GHz / 1 MB + 6 MB
» Intel Core i7 3630QM
   2.4 GHz / 1 MB + 6 MB
» Intel Core i7 4702HQ
   2.2 GHz / 1 MB + 6 MB
» Intel Core i7 4702MQ
   2.2 GHz / 1 MB + 6 MB
» Intel Core i7 2860QM
   2.5 GHz / 1 MB + 8 MB
» Intel Core i7 2920XM
   2.5 GHz / 1 MB + 8 MB
» Intel Core i7 3615QM
   2.3 GHz / 1 MB + 6 MB
» Intel Core i7 3610QM
   2.3 GHz / 1 MB + 6 MB
» Intel Core i7 3632QM
   2.2 GHz / 1 MB + 6 MB
» Intel Core i7 2760QM
   2.4 GHz / 1 MB + 6 MB
» Intel Core i7 2820QM
   2.3 GHz / 1 MB + 8 MB
» Intel Core i7 3612QM
   2.1 GHz / 1 MB + 6 MB
» Intel Core i7 2720QM
   2.2 GHz / 1 MB + 6 MB
» Intel Core i7 2675QM
   2.2 GHz / 1 MB + 6 MB
» Intel Core i7 2670QM
   2.2 GHz / 1 MB + 6 MB
» Intel Core i7 2635QM
   2 GHz / 1 MB + 6 MB
» Intel Core i7 2630QM
   2 GHz / 1 MB + 6 MB
» Intel Core i7 4610M
   3 GHz / 0.5 MB + 4 MB
» Intel Core i7 940XM
   2.13 GHz / 1 MB + 8 MB
» Intel Core i7 4600M
   2.9 GHz / 0.5 MB + 4 MB
» Intel Core i7 920XM
   2 GHz / 1 MB + 8 MB
» Intel Core i7 3540M
   3 GHz / 0.5 MB + 4 MB
» Intel Core i7 4558U
   2.8 GHz / 0.5 MB + 4 MB
» Intel Core i7 3520M
   2.9 GHz / 0.5 MB + 4 MB
» Intel Core i7 2640M
   2.8 GHz / 0.5 MB + 4 MB
» Intel Core i7 840QM
   1.86 GHz / 1 MB + 8 MB
» Intel Core i7 2620M
   2.7 GHz / 0.5 MB + 4 MB
» Intel Core i7 4600U
   2.1 GHz / 0.5 MB + 4 MB
» Intel Core i7 4650U
   1.7 GHz / 0.5 MB + 4 MB
» Intel Core i7 3687U
   2.1 GHz / 0.5 MB + 4 MB
» Intel Core i7 4510U
   2 GHz / 0.5 MB + 4 MB
» Intel Core i7 640M
   2.8 GHz / 0.5 MB + 4 MB
» Intel Core i7 820QM
   1.73 GHz / 1 MB + 8 MB
» Intel Core i7 3667U
   2 GHz / 0.5 MB + 4 MB
» Intel Core i7 4500U
   1.8 GHz / 0.5 MB + 4 MB
» Intel Core i7 4550U
   1.5 GHz / 0.5 MB + 4 MB
» Intel Core i7 740QM
   1.73 GHz / 1 MB + 6 MB
» Intel Core i7 3537U
   2 GHz / 0.5 MB + 4 MB
» Intel Core i7 3517U
   1.9 GHz / 0.5 MB + 4 MB
» Intel Core i7 620M
   2.66 GHz / 0.5 MB + 4 MB
» Intel Core i7 720QM
   1.6 GHz / 1 MB + 6 MB
» Intel Core i7 2649M
   2.3 GHz / 0.5 MB + 4 MB
» Intel Core i7 4610Y
   1.7 GHz / 0.5 MB + 4 MB
» Intel Core i7 2629M
   2.1 GHz / 0.5 MB + 4 MB
» Intel Core i7 2677M
   1.8 GHz / 0.5 MB + 4 MB
» Intel Core i7 660LM
   2.27 GHz / 0.5 MB + 4 MB
» Intel Core i7 2637M
   1.7 GHz / 0.5 MB + 4 MB
» Intel Core i7 2657M
   1.6 GHz / 0.5 MB + 4 MB
» Intel Core i7 3689Y
   1.5 GHz / 0.5 MB + 4 MB
» Intel Core i7 2617M
   1.5 GHz / 0.5 MB + 4 MB
» Intel Core i7 640LM
   2.13 GHz / 0.5 MB + 4 MB
» Intel Core i7 620LM
   2 GHz / 0.5 MB + 4 MB
» Intel Core i7 680UM
   1.47 GHz / 0.5 MB + 4 MB
» Intel Core i7 660UM
   1.33 GHz / 0.5 MB + 4 MB
» Intel Core i7 640UM
   1.2 GHz / 0.5 MB + 4 MB
» Intel Core i7 620UM
   1.06 GHz / 0.5 MB + 4 MB

Surrounding CPUs

- Intel Core 2 Quad Q9000
   2 GHz / 6 MB
- Intel Core i7 2617M
   1.5 GHz / 0.5 MB + 4 MB
- Intel Core i5 3439Y
   1.5 GHz / 0.5 MB + 3 MB
- Intel Core i5 4202Y
   1.6 GHz / 0.5 MB + 3 MB
- Intel Core i5 4220Y
   1.6 GHz / 0.5 MB + 3 MB
» Intel Core i7 640LM
   2.13 GHz / 0.5 MB + 4 MB
+ Intel Core i7 620LM
   2 GHz / 512 KB + 4096 KB
+ Intel Core i3 4100U
   1.8 GHz / 512 KB + 3072 KB
+ Intel Core i3 3227U
   1.9 GHz / 512 KB + 3072 KB
+ AMD A-Series (Desktop) AMD A6-6400K
   3.9 GHz / 4096 KB
+ Intel Core i5 4210Y
   1.5 GHz / 512 KB + 3072 KB
> Notebook / Laptop Reviews and News > FAQ / Tips / Technics > Notebook Processors > Intel Core i7 > Intel Core i7 640LM Notebook Processor
Author: Klaus Hinum, 2010-01-20 (Update: 2012-05-26)