Intel Core i7-620LM vs Intel Core i7-640LM

Intel Core i7-620LM

► remove Intel 620LM

The Intel Core i7-620LM is a fast middle class low voltage dual core CPU for laptops and clocks (due to the Turbo Mode) from 2.0 to 2.8 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 620LM is slower but more power efficient.

A feature of the new Core i7-620LM 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 i7-620LM 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 i5-350M. Beware, that some laptop designs may not feature the Turbo Boost. Therefore, the CPU may be slower than the 350M.

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 show a significant performance boost 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).

Intel Core i7-640LM

► remove 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).

Intel Core i7-620LMIntel Core i7-640LM
Intel Core i7Intel Core i7
ArrandaleArrandale
: Core i7 Arrandale
Intel Core i7-640M (compare)2800 - 3460 MHz2 / 44 MB
Intel Core i7-620M (compare)2660 - 3333 MHz2 / 44 MB
Intel Core i7-660LM (compare)2267 - 3067 MHz2 / 44 MB
Intel Core i7-640LM2130 - 2933 MHz2 / 44 MB
» Intel Core i7-620LM2000 - 2800 MHz2 / 44 MB
Intel Core i7-680UM (compare)1467 - 2533 MHz2 / 44 MB
Intel Core i7-660UM (compare)1333 - 2400 MHz2 / 44 MB
Intel Core i7-640UM (compare)1200 - 2266 MHz2 / 44 MB
Intel Core i7-620UM (compare)1060 - 2133 MHz2 / 44 MB
Intel Core i7-640M (compare)2800 - 3460 MHz2 / 44 MB
Intel Core i7-620M (compare)2660 - 3333 MHz2 / 44 MB
Intel Core i7-660LM (compare)2267 - 3067 MHz2 / 44 MB
» Intel Core i7-640LM2130 - 2933 MHz2 / 44 MB
Intel Core i7-620LM2000 - 2800 MHz2 / 44 MB
Intel Core i7-680UM (compare)1467 - 2533 MHz2 / 44 MB
Intel Core i7-660UM (compare)1333 - 2400 MHz2 / 44 MB
Intel Core i7-640UM (compare)1200 - 2266 MHz2 / 44 MB
Intel Core i7-620UM (compare)1060 - 2133 MHz2 / 44 MB
2000 - 2800 MHz2130 - 2933 MHz
25002500
512 KB512 KB
4 MB4 MB
2 / 42 / 4
25 25
382+177 382+177
32 32
81+144 mm281+177 mm2
105 °C105 °C
BGA1288BGA1288
Turbo Boost (2.8 GHz max), Hyper Threading, Enhanced Speedstep, integrated GMA HD 266-566 MHzTurbo Boost (2.93 GHz max), Hyper Threading, Enhanced Speedstep, integrated GMA HD 266-566MHz
$300 U.S.$332 U.S.
Intel Core i7 620LMIntel Core i7 640LM

Cinebench R11.5 - CPU Multi 64Bit
1.9 Points (4%)
Cinebench R10 - Rendering Single 32Bit
2937 Points (32%)
min: 2980     avg: 3053.5     median: 3053 (33%)     max: 3127 Points
Cinebench R10 - Rendering Multiple CPUs 32Bit
5640 Points (9%)
min: 5869     avg: 5956     median: 5956 (9%)     max: 6043 Points
Cinebench R10 - Rendering Multiple CPUs 64Bit
7205 Points (9%)
Cinebench R10 - Rendering Single CPUs 64Bit
3869 Points (37%)
wPrime 2.0x - 1024m *
848.1 seconds (10%)
min: 667     avg: 1036.5     median: 1036 (12%)     max: 1405 seconds
wPrime 2.0x - 32m *
26.5 seconds (5%)
min: 20     avg: 21.4     median: 21 (4%)     max: 21 seconds
3DMark 06 - CPU
2358 Points (16%)
min: 2496     avg: 2539     median: 2539 (17%)     max: 2582 Points
Super Pi mod 1.5 XS 1M *
16.2 Seconds (3%)
min: 14     avg: 14.5     median: 14 (3%)     max: 15 Seconds
Super Pi mod 1.5 XS 2M *
38.1 Seconds (2%)
37 Seconds (2%)
Super Pi Mod 1.5 XS 32M *
920 Seconds (4%)
min: 869     avg: 877.5     median: 877 (4%)     max: 886 Seconds
SiSoft Sandra Dhrystone (MIPS)
28100 MIPS (13%)
SiSoft Sandra Whetstone (MFLOPS)
24620 MFLOPS (19%)
PCMark 05 - Standard 1024x768
5734 Points (36%)
Windows 7 Experience Index - Processor
6.5 points (93%)

Average Benchmarks Intel Core i7-620LM → 100%

Average Benchmarks Intel Core i7-640LM → 101%

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* Smaller numbers mean a higher performance
1 This benchmark is not used for the average calculation

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Redaktion, 2017-09- 8 (Update: 2017-09-11)