Intel Core i7-2649M vs Intel Core i7-2640M vs Intel Core i7-2820QM

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 i7-2640M

► 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 i7-2820QM

► remove Intel 2820QM

The Intel Core i7-2820QM is a fast high-end quad core processor for laptops. At the time of announcement (Jan. 2011) it was the fastest 45 Watt processor. It is based on the Sandy Bridge architecture and offers Hyperthreading to handle 8 threads at once (for a better usage of the pipeline). Compared to the previous Clarksdale quad-cores, the i7-2820QM is now manufactured in 32nm and offers an integrated graphics card and AES functions. Compared to the slower clocked 2720QM, the 2820QM offers more level 3 cache (8 vs. 6MB).

Sandy Bridge is the evolutionary successor of the Arrandale architecture. The most noteable improvements are the new 256Bit AVX instructions, the improved Turbo Boost and the integration of the graphics card into the 32nm CPU core. Furthermore, the integrated memory controller was improved and supports up to 8 GB DDR3-1333.

The i7-2820QM offers an integrated graphics card (Intel HD Graphics 3000) which proved to be clearly faster than the old Intel HD Graphics in the Arrandale CPUs and on a level with entry level dedicated graphics cards like the GeForce 310M. The HD Graphics 3000 also supports Turbo Boost and clocks between 650 MHz and 1300 MHz. As the graphics card shares the fast last level cache, the processor is a bit slower with activated GPU.

The performance of the Core i7-2820QM is noticeable better (e.g. Cinebench versions) than the previous generation Core i7-940XM quad core. Therefore, the performance should be sufficient for modern 3D games and demanding applications. Thanks to the fast Turbo Boost 2.0 even single threaded applications run very fast. The detailed benchmark results of the 2820QM can be found in the lower section of this page.

The relative high TDP rating of the 2820QM of 45 Watt enables the usage of the quad core only in 15" laptops and up. However, compared to the previous generation of quad-cores, the TDP improved, as the integrated GPU is now included.

Intel Core i7-2649MIntel Core i7-2640MIntel Core i7-2820QM
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 MHz2800 - 3500 MHz2300 - 3400 MHz
128 KB128 KB256 KB
512 KB512 KB1 MB
4 MB4 MB8 MB
2 / 42 / 44 / 8
25 35 45
624 624 995
32 32 32
149 mm2149 mm2216 mm2
100 °C100 °C100 °C
BGA1023FCBGA1224, FCPGA988
HD Graphics 3000 500-1100MHz, integrated DDR3-1333 memory controller, Virtualization, Trusted Execution, Hyper-Threading, Turbo Boost 2.0HD Graphics 3000, DDR3-1066/1333 Memory Controller (max 8GB), HyperThreading, AVX, Quick Sync, VirtualizationHD Graphics 3000 (650-1300MHz), DDR-1066/1333/1600 Memory Controller, HyperThreading, AVX, Quick Sync, Virtualization
iGPUIntel HD Graphics 3000 (500 - 1100 MHz)Intel HD Graphics 3000 (650 - 1300 MHz)Intel HD Graphics 3000 (650 - 1300 MHz)
Intel Core i7 2649MIntel Core i7 2820QM
$346 U.S.$568 U.S.

Cinebench R11.5 - CPU Multi 64Bit
min: 3.07     avg: 3.1     median: 3.2 (12%)     max: 3.2 Points
min: 4.41     avg: 5.2     median: 5.5 (20%)     max: 5.81 Points
Cinebench R11.5 - CPU Single 64Bit
1.4 Points (56%)
Cinebench R10 - Rendering Single 32Bit
min: 4009     avg: 4382.9     median: 4443 (49%)     max: 4506 Points
min: 4200     avg: 4273.5     median: 4249.5 (46%)     max: 4365 Points
Cinebench R10 - Rendering Multiple CPUs 32Bit
min: 9691     avg: 9765.9     median: 9778 (20%)     max: 9833 Points
min: 12641     avg: 14781.5     median: 15043.5 (30%)     max: 16105 Points
Cinebench R10 - Rendering Multiple CPUs 64Bit
min: 11067     avg: 11766.9     median: 11874 (16%)     max: 12037 Points
min: 16327     avg: 18631     median: 19316 (25%)     max: 20393 Points
Cinebench R10 - Rendering Single CPUs 64Bit
min: 5445     avg: 5549.1     median: 5534 (54%)     max: 5665 Points
min: 5232     avg: 5368.1     median: 5372 (52%)     max: 5468 Points
wPrime 2.0x - 1024m *
min: 478.5     avg: 493.5     median: 489 (6%)     max: 523.632 seconds
min: 281     avg: 366.3     median: 360.2 (4%)     max: 458.561 seconds
wPrime 2.0x - 32m *
min: 15     avg: 15.5     median: 15.1 (3%)     max: 16.614 seconds
min: 8.27     avg: 10.7     median: 10 (2%)     max: 13.635 seconds
WinRAR - Result
min: 2555     avg: 2632     median: 2620 (31%)     max: 2733 KB/s
X264 HD Benchmark 4.0 - Pass 2
min: 16.38     avg: 16.9     median: 17 (0%)     max: 17.21 fps
X264 HD Benchmark 4.0 - Pass 1
min: 88.74     avg: 91     median: 89.4 (33%)     max: 95 fps
TrueCrypt - Serpent Mean 100MB
min: 0.124     avg: 0.1     median: 0.1 (8%)     max: 0.152 GB/s
TrueCrypt - Twofish Mean 100MB
min: 0.198     avg: 0.2     median: 0.3 (9%)     max: 0.27 GB/s
TrueCrypt - AES Mean 100MB
1.6 GB/s (8%)
3DMark 06 - CPU
min: 3882     avg: 3933.5     median: 3927 (27%)     max: 3978 Points
min: 4427     avg: 5485.7     median: 5818.5 (40%)     max: 5923 Points
Super Pi mod 1.5 XS 1M *
min: 11     avg: 11.2     median: 11 (2%)     max: 11.66 Seconds
min: 11     avg: 11.2     median: 11 (2%)     max: 11.6 Seconds
Super Pi mod 1.5 XS 2M *
min: 25     avg: 26     median: 26 (1%)     max: 27.04 Seconds
min: 23.1     avg: 29.7     median: 25 (1%)     max: 54 Seconds
Super Pi Mod 1.5 XS 32M *
min: 604     avg: 626.2     median: 634 (3%)     max: 639 Seconds
min: 618     avg: 628.2     median: 625 (3%)     max: 643.96 Seconds
SiSoft Sandra Dhrystone (MIPS)
min: 64300     avg: 64522.5     median: 64545 (31%)     max: 64700 MIPS
min: 83000     avg: 90496.7     median: 87000 (41%)     max: 101490 MIPS
SiSoft Sandra Whetstone (MFLOPS)
min: 39000     avg: 39255     median: 39135 (30%)     max: 39750 MFLOPS
min: 23590     avg: 53623.3     median: 66280 (51%)     max: 71000 MFLOPS
PCMark 05 - Standard 1024x768
13842 Points (87%)
Windows 7 Experience Index - Processor
min: 7     avg: 7.2     median: 7.1 (91%)     max: 7.6 points
min: 7.4     avg: 7.5     median: 7.5 (96%)     max: 7.5 points
3DMark Vantage - P CPU no PhysX 1280x1024
min: 10127     avg: 10509.3     median: 10559 (18%)     max: 10838 Points
min: 16115     avg: 18440.5     median: 18520 (31%)     max: 20526 Points
3DMark 11 - Performance Physics 1280x720
min: 3902     avg: 4140.4     median: 4172 (22%)     max: 4320 points
min: 5165     avg: 6335     median: 6724 (36%)     max: 7245 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 (21%)
Geekbench 2 - 32 Bit - Integer
6298 Points (19%)
Geekbench 2 - 32 Bit - Total Score
6913 Points (26%)

Average Benchmarks Intel Core i7-2640M → 100%

Average Benchmarks Intel Core i7-2820QM → 128%

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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)