Intel Core i7-2649M vs Intel Core i7-2657M vs Intel Core i7-2640M

Intel Core i7-2649M

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The Intel Core i7-2649M is power efficient LV (Low Voltage) processor for laptops. The base frequency of 2.3 GHz is relatively low, but due to Turbo Boost 2.0, the CPU may clock up to 3.2 GHz (one core loaded, 2.9 GHz with both cores loaded). However, this is depending on the cooling and power consumption of the laptop. Due to HyperThreading, the i7-2649M is able to handle 4 threads in parallel. Compared to the similar called Core i7-2620M, the 2649M is slower but also needs less power (25W versus 35W TDP).

Sandy Bridge is the evolutionary successor of the Arrandale architecture. The most noteable improvements is the improved Turbo 2.0 and the integration of the graphics card into the 32nm CPU core. 

The integrated Intel HD Graphics 3000 clocked at 500 or 1100MHz (Turbo Boost). Due to the slower base clock rate, compared to HD Graphics 3000 in 35W and 45W processors (usually clocked at 650), the performance should be a bit lower.

The performance of the CPU should be a bit higher than a similar clocked Arrandale Core i7 LV. Therefore, the performance should a bit above the Core i3-390M if the Turbo can be used often.

The TDP of 25W (includes the integrated GPU and memory controller) allows the use of the 2649M CPU in thin notebooks.

Intel Core i7-2657M

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The Intel Core i7-2657M is power efficient ULV (Ultra Low Voltage) processor for thin and light laptops. The base frequency of 1.6 GHz is relatively low, but due to Turbo Boost 2.0, the CPU may clock up to 2.7 GHz (on core loaded, 2.4 GHz with both cores loaded). However, this depends on the cooling and power consumption of the laptop. Due to HyperThreading, the i7-2657M is able to handle 4 threads in parallel. Compared to the slower i7-2617M, the 2657M offers a higher clock speed (processor core and turbo, graphics turbo).

Sandy Bridge is the evolutionary successor of the Arrandale architecture. The most noteable improvements is the improved Turbo 2.0 and the integration of the graphics card into the 32nm CPU core. 

The integrated Intel HD Graphics 3000 clocked at 350 or 1000MHz (Turbo Boost). Due to the slower clock rate, compared to HD Graphics 3000 in 35W and 45W processors (usually clocked at 650-1100/1300MHz in non LV processors), the performance should be noticeable lower.

The performance of the CPU should be a bit higher than a similar clocked Arrandale Core i5. In our benchmarks (see below), the ULV processor was as fast as a Core i3-2310M due to the high Turbo Boost frequencies. However, the laptop cooling system has to keep the processor relatively cool for the Turbo Boost to work often.

The TDP of 17W (includes the integrated GPU and memory controller) allows the use of the 2657M CPU in small subnotebooks.

Intel Core i7-2640M

► remove Intel 2640M

The Intel Core i7-2640M is the fastest dual core processor at the time of introduction in Q3 2011 and successor of the slower clocked i7-2620M. It is based on the Sandy Bridge architecture and offers Hyperthreading to handle 4 threads at once (for a better usage of the pipeline). Compared to the slower Core i5, the i7 offers a larger last level cache of 4MB. The base clock speed is 2.8 GHz but due to Turbo Boost it can reach 3.3 GHz (2 cores active) and 3.5 GHz (1 core active).

Sandy Bridge is the evolutionary successor of the Arrandale architecture. The most noteable improvements are the new 256Bit AVX instructions, the improved Turbo 2.0 and the integration of the graphics card into the 32nm CPU core. 

Der i7-2640M offers an integrated graphics card ( Intel HD Graphics 3000) which is clearly faster then the older Intel HD Graphics in the Arrandale CPUs. As the new GPU is included in the CPU, it is also manufactured in 32nm and shares the fast level 3 cache with the CPU cores (using a new ring bus). In the 2620M it is clocked from 650-1300MHz (Turbo Boost), and in the 2640M it should be similar.

Furthermore, an improved dual-channel DDR3 memory controller is included on the CPU die that is used by the CPU and GPU part.

Due to the improved architecture and the new Turbo Boost 2.0, the average performance of the Core i7-2640M is higher than a similar clocked Arrandale Core i7 dual core. The performance should even excel the old high-end quad core models like the Core i7-820QM.

The 35W TDP rating includes the integrated GPU and memory controller.

Intel Core i7-2649MIntel Core i7-2657MIntel Core i7-2640M
Intel Core i7Intel Core i7Intel Core i7
Sandy BridgeSandy BridgeSandy Bridge
: Core i7 Sandy Bridge
Intel Core i7-2960XM2700 - 3700 MHz4 / 88 MB
Intel Core i7-2860QM2500 - 3600 MHz4 / 88 MB
Intel Core i7-2920XM2500 - 3500 MHz4 / 88 MB
Intel Core i7-2760QM2400 - 3500 MHz4 / 86 MB
Intel Core i7-2820QM2300 - 3400 MHz4 / 88 MB
Intel Core i7-2720QM2200 - 3300 MHz4 / 86 MB
Intel Core i7-2675QM2200 - 3100 MHz4 / 86 MB
Intel Core i7-2670QM2200 - 3100 MHz4 / 86 MB
Intel Core i7-2635QM2000 - 2900 MHz4 / 86 MB
Intel Core i7-2630QM2000 - 2900 MHz4 / 86 MB
Intel Core i7-2640M2800 - 3500 MHz2 / 44 MB
Intel Core i7-2620M2700 - 3400 MHz2 / 44 MB
» Intel Core i7-2649M2300 - 3200 MHz2 / 44 MB
Intel Core i7-2629M2100 - 3000 MHz2 / 44 MB
Intel Core i7-2677M1800 - 2900 MHz2 / 44 MB
Intel Core i7-2637M1700 - 2800 MHz2 / 44 MB
Intel Core i7-2657M1600 - 2700 MHz2 / 44 MB
Intel Core i7-2617M1500 - 2600 MHz2 / 44 MB
Intel Core i7-2960XM2700 - 3700 MHz4 / 88 MB
Intel Core i7-2860QM2500 - 3600 MHz4 / 88 MB
Intel Core i7-2920XM2500 - 3500 MHz4 / 88 MB
Intel Core i7-2760QM2400 - 3500 MHz4 / 86 MB
Intel Core i7-2820QM2300 - 3400 MHz4 / 88 MB
Intel Core i7-2720QM2200 - 3300 MHz4 / 86 MB
Intel Core i7-2675QM2200 - 3100 MHz4 / 86 MB
Intel Core i7-2670QM2200 - 3100 MHz4 / 86 MB
Intel Core i7-2635QM2000 - 2900 MHz4 / 86 MB
Intel Core i7-2630QM2000 - 2900 MHz4 / 86 MB
Intel Core i7-2640M2800 - 3500 MHz2 / 44 MB
Intel Core i7-2620M2700 - 3400 MHz2 / 44 MB
Intel Core i7-2649M2300 - 3200 MHz2 / 44 MB
Intel Core i7-2629M2100 - 3000 MHz2 / 44 MB
Intel Core i7-2677M1800 - 2900 MHz2 / 44 MB
Intel Core i7-2637M1700 - 2800 MHz2 / 44 MB
» Intel Core i7-2657M1600 - 2700 MHz2 / 44 MB
Intel Core i7-2617M1500 - 2600 MHz2 / 44 MB
Intel Core i7-2960XM2700 - 3700 MHz4 / 88 MB
Intel Core i7-2860QM2500 - 3600 MHz4 / 88 MB
Intel Core i7-2920XM2500 - 3500 MHz4 / 88 MB
Intel Core i7-2760QM2400 - 3500 MHz4 / 86 MB
Intel Core i7-2820QM2300 - 3400 MHz4 / 88 MB
Intel Core i7-2720QM2200 - 3300 MHz4 / 86 MB
Intel Core i7-2675QM2200 - 3100 MHz4 / 86 MB
Intel Core i7-2670QM2200 - 3100 MHz4 / 86 MB
Intel Core i7-2635QM2000 - 2900 MHz4 / 86 MB
Intel Core i7-2630QM2000 - 2900 MHz4 / 86 MB
» Intel Core i7-2640M2800 - 3500 MHz2 / 44 MB
Intel Core i7-2620M2700 - 3400 MHz2 / 44 MB
Intel Core i7-2649M2300 - 3200 MHz2 / 44 MB
Intel Core i7-2629M2100 - 3000 MHz2 / 44 MB
Intel Core i7-2677M1800 - 2900 MHz2 / 44 MB
Intel Core i7-2637M1700 - 2800 MHz2 / 44 MB
Intel Core i7-2657M1600 - 2700 MHz2 / 44 MB
Intel Core i7-2617M1500 - 2600 MHz2 / 44 MB
2300 - 3200 MHz1600 - 2700 MHz2800 - 3500 MHz
128 KB128 KB128 KB
512 KB512 KB512 KB
4 MB4 MB4 MB
2 / 42 / 42 / 4
25 17 35
624 624 624
32 32 32
149 mm2149 mm2149 mm2
100 °C100 °C100 °C
BGA1023BGA1023
HD Graphics 3000 500-1100MHz, integrated DDR3-1333 memory controller, Virtualization, Trusted Execution, Hyper-Threading, Turbo Boost 2.0Turbo Boost 2.0, Hyper-Threading, Virtualization VT-x, Virtualization for Directed I/O (VT-d), Trusted Execution, AES, Intel 64, Anti-Theft, My WiFi, Idle States, Enhanced SpeedStep, Thermal Monitorin, Execute Disable BitHD Graphics 3000, DDR3-1066/1333 Memory Controller (max 8GB), HyperThreading, AVX, Quick Sync, Virtualization
iGPUIntel HD Graphics 3000 (500 - 1100 MHz)Intel HD Graphics 3000 (350 - 1000 MHz)Intel HD Graphics 3000 (650 - 1300 MHz)
Intel Core i7 2649MIntel Core i7 2657M
$317 U.S.$346 U.S.

Cinebench R11.5 - CPU Multi 64Bit
1.9 Points (4%)
3.1 Points (7%)
Cinebench R11.5 - CPU Single 64Bit
1.4 Points (68%)
Cinebench R10 - Rendering Single 32Bit
3491 Points (38%)
min: 4009     avg: 4382.9     median: 4443 (49%)     max: 4506 Points
Cinebench R10 - Rendering Multiple CPUs 32Bit
6229 Points (10%)
min: 9691     avg: 9765.9     median: 9778 (15%)     max: 9833 Points
Cinebench R10 - Rendering Multiple CPUs 64Bit
7715 Points (10%)
min: 11067     avg: 11766.9     median: 11874 (16%)     max: 12037 Points
Cinebench R10 - Rendering Single CPUs 64Bit
4376 Points (42%)
min: 5445     avg: 5549.1     median: 5534 (53%)     max: 5665 Points
wPrime 2.0x - 1024m *
min: 478     avg: 493.5     median: 489 (6%)     max: 523 seconds
wPrime 2.0x - 32m *
min: 15     avg: 15.5     median: 15 (3%)     max: 16 seconds
WinRAR - Result
min: 2555     avg: 2632     median: 2620 (31%)     max: 2733 KB/s
X264 HD Benchmark 4.0 - Pass 2
min: 16     avg: 16.9     median: 17 (0%)     max: 17 fps
X264 HD Benchmark 4.0 - Pass 1
min: 88     avg: 91     median: 89 (33%)     max: 95 fps
TrueCrypt - Serpent Mean 100MB
0.1 GB/s (7%)
TrueCrypt - Twofish Mean 100MB
0.2 GB/s (8%)
TrueCrypt - AES Mean 100MB
1.6 GB/s (8%)
3DMark 06 - CPU
2546 Points (17%)
min: 3882     avg: 3933.5     median: 3927 (26%)     max: 3978 Points
Super Pi mod 1.5 XS 1M *
14 Seconds (3%)
11.2 Seconds (2%)
Super Pi mod 1.5 XS 2M *
32 Seconds (1%)
min: 25     avg: 26     median: 26 (1%)     max: 27 Seconds
Super Pi Mod 1.5 XS 32M *
751 Seconds (3%)
min: 604     avg: 626.2     median: 634 (3%)     max: 639 Seconds
SiSoft Sandra Dhrystone (MIPS)
40570 MIPS (19%)
min: 64300     avg: 64522.5     median: 64545 (31%)     max: 64700 MIPS
SiSoft Sandra Whetstone (MFLOPS)
26000 MFLOPS (20%)
min: 39000     avg: 39255     median: 39135 (30%)     max: 39750 MFLOPS
Windows 7 Experience Index - Processor
6.6 points (94%)
7.2 points (103%)
3DMark Vantage - P CPU no PhysX 1280x1024
7732 Points (11%)
min: 10127     avg: 10509.3     median: 10559 (15%)     max: 10838 Points
3DMark 11 - Performance Physics 1280x720
3102 points (16%)
min: 3902     avg: 4140.4     median: 4172 (21%)     max: 4320 points
3DMark - Ice Storm Standard Physics 1280x720
26569 Points (17%)
3DMark - Cloud Gate Standard Physics 1280x720
2876 Points (7%)
Geekbench 2 - 32 Bit - Stream
7873 Points (64%)
Geekbench 2 - 32 Bit - Memory
6847 Points (62%)
Geekbench 2 - 32 Bit - Floating Point
7293 Points (12%)
Geekbench 2 - 32 Bit - Integer
6298 Points (11%)
Geekbench 2 - 32 Bit - Total Score
6913 Points (16%)

Average Benchmarks Intel Core i7-2657M → 100%

Average Benchmarks Intel Core i7-2640M → 122%

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

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> Notebook / Laptop Reviews and News > Benchmarks / Tech > Processor Comparison - Head 2 Head
Redaktion, 2017-09- 8 (Update: 2017-09-11)