Intel Core i7-3840QM vs Intel Core i7-3540M

Intel Core i7-3840QM

► remove Intel 3840QM

The Intel Core i7-3840QM is a fast quad-core processor for laptops based on the Ivy Bridge architecture and successor of the i7-3820QM. Due to Hyperthreading, the four cores can handle up to eight threads in parallel leading to better utilization of the CPU. Each core offers a base speed of 2.8 GHz but can dynamically increase clock rates with Turbo Boost up to 3.6 GHz (for 4 active cores), 3.7 GHz (for 2 active cores) and 3.8 GHz (for 1 active core). Furthermore, the CPU offers 8 MB Last Level 3 Cache.

Ivy Bridge is an enhanced die shrink of the Sandy Bridge architecture with improvements on both GPU and CPU performance. The CPUs are produced in 22nm (versus 32nm Sandy Bridge CPUs) and are the first to introduce 3D transistors for increased energy efficiency when compared to similarly clocked Sandy Bridge processors. Other new features are integrated PCI Express 3.0 and  DDR3(L)-1600 support.

The performance of the Core i7-3840QM should be slightly above a similarly clocked Sandy Bridge processor due to slight architectural improvements. Overall, performance should be similar to the Core i7-3920XM.

The integrated Intel HD Graphics 4000 offers 16 Execution Units (EUs) clocked at 650 MHz up to 1300 MHz with Turbo Boost, making it one of the faster variants.

As with most quad-core Ivy Bridge models, the Core i7-3840QM is specified at a TDP of 45 Watts including graphics card and memory controller. Therefore, the CPU is well-suited for laptops 15-inches or greater.

Intel Core i7-3540M

► remove Intel 3540M

The Intel Core i7-3540M is the fastest dual-core processor for laptops based on the Ivy Bridge architecture at the time of introduction in Q1 2013. Due to Hyperthreading, the two cores can handle up to four threads in parallel leading to better utilization of the CPU. Each core offers a base speed of 3.0 GHz but can dynamically increase clock rates with Turbo Boost up to 3.5 GHz (for 2 active cores) and 3.7 GHz (for 1 active core). As its Sandy-Bridge-based predecessor Core i7-2640M, it offers a 4 MB L3-Cache.

Ivy Bridge is an enhanced die shrink of the Sandy Bridge architecture with improvements on both GPU and CPU performance. The CPUs are produced in 22nm (versus 32nm Sandy Bridge CPUs) and are the first to introduce 3D transistors for increased energy efficiency when compared to similarly clocked Sandy Bridge processors. Other new features are integrated PCI Express 3.0 and  DDR3(L)-1600 support.

The performance of the Core i7-3540M is slightly above a similarly clocked Sandy Bridge processor due to the architectural improvements. As a result, overall performance is about 5 - 10 % above the old i7-2640M.

The integrated Intel HD Graphics 4000 offers 16 Execution Units (EUs) clocked at 650 MHz up to 1300 MHz with Turbo Boost, making it one of the fastest variants.

Just like most other Ivy Bridge dual-cores, the i7-3540M is rated at a TDP of 35 W. Therefore, even smaller laptops can use the Core i7.

Intel Core i7-3840QMIntel Core i7-3540M
Intel Core i7Intel Core i7
Ivy BridgeIvy Bridge
: Core i7 Ivy Bridge
Intel Core i7-3940XM (compare)3000 - 3900 MHz4 / 88 MB
Intel Core i7-3920XM (compare)2900 - 3800 MHz4 / 88 MB
» Intel Core i7-3840QM2800 - 3800 MHz4 / 88 MB
Intel Core i7-3820QM (compare)2700 - 3700 MHz4 / 88 MB
Intel Core i7-3740QM (compare)2700 - 3700 MHz4 / 86 MB
Intel Core i7-3720QM (compare)2600 - 3600 MHz4 / 86 MB
Intel Core i7-3635QM (compare)2400 - 3400 MHz4 / 86 MB
Intel Core i7-3630QM (compare)2400 - 3400 MHz4 / 86 MB
Intel Core i7-3615QM (compare)2300 - 3300 MHz4 / 86 MB
Intel Core i7-3610QM (compare)2300 - 3300 MHz4 / 86 MB
Intel Core i7-3632QM (compare)2200 - 3200 MHz4 / 86 MB
Intel Core i7-3612QM (compare)2100 - 3100 MHz4 / 86 MB
Intel Core i7-3540M3000 - 3700 MHz2 / 44 MB
Intel Core i7-3520M (compare)2900 - 3600 MHz2 / 44 MB
Intel Core i7-3687U (compare)2100 - 3300 MHz2 / 44 MB
Intel Core i7-3667U (compare)2000 - 3200 MHz2 / 44 MB
Intel Core i7-3537U (compare)2000 - 3100 MHz2 / 44 MB
Intel Core i7-3517U (compare)1900 - 3000 MHz2 / 44 MB
Intel Core i7-3689Y (compare)1500 - 2600 MHz2 / 44 MB
Intel Core i7-3940XM (compare)3000 - 3900 MHz4 / 88 MB
Intel Core i7-3920XM (compare)2900 - 3800 MHz4 / 88 MB
Intel Core i7-3840QM2800 - 3800 MHz4 / 88 MB
Intel Core i7-3820QM (compare)2700 - 3700 MHz4 / 88 MB
Intel Core i7-3740QM (compare)2700 - 3700 MHz4 / 86 MB
Intel Core i7-3720QM (compare)2600 - 3600 MHz4 / 86 MB
Intel Core i7-3635QM (compare)2400 - 3400 MHz4 / 86 MB
Intel Core i7-3630QM (compare)2400 - 3400 MHz4 / 86 MB
Intel Core i7-3615QM (compare)2300 - 3300 MHz4 / 86 MB
Intel Core i7-3610QM (compare)2300 - 3300 MHz4 / 86 MB
Intel Core i7-3632QM (compare)2200 - 3200 MHz4 / 86 MB
Intel Core i7-3612QM (compare)2100 - 3100 MHz4 / 86 MB
» Intel Core i7-3540M3000 - 3700 MHz2 / 44 MB
Intel Core i7-3520M (compare)2900 - 3600 MHz2 / 44 MB
Intel Core i7-3687U (compare)2100 - 3300 MHz2 / 44 MB
Intel Core i7-3667U (compare)2000 - 3200 MHz2 / 44 MB
Intel Core i7-3537U (compare)2000 - 3100 MHz2 / 44 MB
Intel Core i7-3517U (compare)1900 - 3000 MHz2 / 44 MB
Intel Core i7-3689Y (compare)1500 - 2600 MHz2 / 44 MB
2800 - 3800 MHz3000 - 3700 MHz
256 KB128 KB
1 MB512 KB
8 MB4 MB
4 / 82 / 4
45 35
1400
22 22
160 mm2
105 °C105 °C
HD Graphics 4000, DDR3(L)-1600 Memory Controller, HyperThreading, AVX, Quick Sync, VirtualizationHD Graphics 4000 (650 - 1300 MHz), DDR3-1600 Memory Controller, HyperThreading, AVX, Quick Sync, Virtualization
iGPUIntel HD Graphics 4000 (650 - 1300 MHz)Intel HD Graphics 4000 (650 - 1300 MHz)
$568 U.S.
BGA1023, PGA988
Intel Core i7 3540M

Cinebench R11.5 - CPU Multi 64Bit
min: 7     avg: 7.1     median: 7.1 (18%)     max: 7.15 Points
min: 3.41     avg: 3.5     median: 3.5 (9%)     max: 3.49 Points
Cinebench R11.5 - CPU Single 64Bit
min: 1.58     avg: 1.6     median: 1.6 (64%)     max: 1.59 Points
min: 1.52     avg: 1.5     median: 1.5 (62%)     max: 1.54 Points
Cinebench R10 - Rendering Single 32Bit
min: 5137     avg: 5145     median: 5144.5 (53%)     max: 5152 Points
min: 5018     avg: 5030     median: 5029.5 (52%)     max: 5041 Points
Cinebench R10 - Rendering Multiple CPUs 32Bit
min: 20132     avg: 20135     median: 20135 (34%)     max: 20138 Points
min: 10628     avg: 10811     median: 10810.5 (18%)     max: 10993 Points
Cinebench R10 - Rendering Multiple CPUs 64Bit
min: 25111     avg: 25178     median: 25178 (33%)     max: 25245 Points
min: 13307     avg: 13435     median: 13434.5 (18%)     max: 13562 Points
Cinebench R10 - Rendering Single CPUs 64Bit
min: 6405     avg: 6478     median: 6478 (60%)     max: 6551 Points
min: 6326     avg: 6414     median: 6414 (60%)     max: 6502 Points
wPrime 2.0x - 1024m *
min: 245     avg: 246     median: 246.2 (3%)     max: 247.481 seconds
471 seconds (6%)
wPrime 2.0x - 32m *
min: 7.348     avg: 7.4     median: 7.4 (1%)     max: 7.441 seconds
14.9 seconds (3%)
WinRAR - Result
4712 KB/s (55%)
2940 KB/s (34%)
X264 HD Benchmark 4.0 - Pass 2
min: 37.11     avg: 38.2     median: 38.2 (24%)     max: 39.23 fps
19.9 fps (13%)
X264 HD Benchmark 4.0 - Pass 1
min: 156.2     avg: 158     median: 157.8 (56%)     max: 159.37 fps
105 fps (37%)
TrueCrypt - Serpent Mean 100MB
min: 0.375     avg: 0.4     median: 0.4 (20%)     max: 0.376 GB/s
0.2 GB/s (10%)
TrueCrypt - Twofish Mean 100MB
min: 0.638     avg: 0.6     median: 0.6 (20%)     max: 0.642 GB/s
0.3 GB/s (10%)
TrueCrypt - AES Mean 100MB
3.6 GB/s (18%)
1.7 GB/s (9%)
3DMark 06 - CPU
min: 6946     avg: 6998     median: 6998 (47%)     max: 7050 Points
min: 4267     avg: 4320     median: 4319.5 (29%)     max: 4372 Points
Super Pi mod 1.5 XS 1M *
min: 9     avg: 9.4     median: 9.4 (2%)     max: 9.703 Seconds
10.4 Seconds (2%)
Super Pi mod 1.5 XS 2M *
min: 21.965     avg: 22     median: 22 (1%)     max: 22 Seconds
23.9 Seconds (1%)
Super Pi Mod 1.5 XS 32M *
541 Seconds (2%)
557 Seconds (2%)
SiSoft Sandra Dhrystone (MIPS)
124100 MIPS (59%)
SiSoft Sandra Whetstone (MFLOPS)
85000 MFLOPS (65%)
Windows 7 Experience Index - Processor
7.7 points (99%)
7.3 points (94%)
3DMark Vantage - P CPU no PhysX 1280x1024
min: 24545     avg: 24741     median: 24740.5 (35%)     max: 24936 Points
11749 Points (16%)
3DMark 11 - Performance Physics 1280x720
min: 7360     avg: 7787     median: 7786.5 (38%)     max: 8213 points
min: 4391     avg: 4627     median: 4627 (23%)     max: 4863 points
3DMark - Ice Storm Standard Physics 1280x720
min: 40631     avg: 42023     median: 42022.5 (27%)     max: 43414 Points
3DMark - Cloud Gate Standard Physics 1280x720
min: 3424     avg: 3483     median: 3482.5 (9%)     max: 3541 Points
3DMark - Fire Strike Physics 1920x1080
min: 4929     avg: 4966     median: 4966 (17%)     max: 5003 Points

Average Benchmarks Intel Core i7-3840QM → 100%

Average Benchmarks Intel Core i7-3540M → 76%

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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)