Intel Core i7-3940XM vs Intel Core i7-3540M

Intel Core i7-3940XM

► remove Intel 3940XM

The Intel Core i7-3940XM is the fastest quad-core processor for laptops (at the time of introduction in September 2012) an successor of the i7-3920XM. 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 3.0 GHz but can dynamically increase clock rates with Turbo Boost up to 3.7 GHz (for 4 active cores), 3.8 GHz (for 2 active cores) and 3.9 GHz (for 1 active core). Furthermore, the Extreme CPUs offer an unlocked multiplicator for easy overclocking.

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 i7-3940XM should be slightly above a similarly clocked Sandy Bridge processor due to slight architectural improvements. Because of the higher clock speed, the former champion Core i7-3920XM should be outperformed by about 3%.

The integrated Intel HD Graphics 4000 offers 16 Execution Units (EUs) clocked at 650 MHz up to 1350 MHz with Turbo Boost, making it the fastest variant.

The XM CPUs are rated at a TDP of 55 Watts including graphics card and memory controller and therefore 10 Watt higher than the other quad-core models.  Therefore, the CPU is well-suited for laptops 17-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 i7-3940XMIntel Core i7-3540M
Intel Core i7Intel Core i7
Ivy BridgeIvy Bridge
: Core i7 Ivy Bridge
» Intel Core i7-3940XM3000 - 3900 MHz4 / 88 MB
Intel Core i7-3920XM (compare)2900 - 3800 MHz4 / 88 MB
Intel Core i7-3840QM (compare)2800 - 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 i7-3940XM3000 - 3900 MHz4 / 88 MB
Intel Core i7-3920XM (compare)2900 - 3800 MHz4 / 88 MB
Intel Core i7-3840QM (compare)2800 - 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
3000 - 3900 MHz3000 - 3700 MHz
256 KB128 KB
1 MB512 KB
8 MB4 MB
4 / 82 / 4
55 35
1400
22 22
160 mm2
105 °C105 °C
FCPGA988BGA1023, PGA988
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 - 1350 MHz)Intel HD Graphics 4000 (650 - 1300 MHz)
$1096 U.S.
Intel Core i7 3540M

Cinebench R11.5 - CPU Multi 64Bit
7.5 Points (17%)
3.5 Points (8%)
Cinebench R11.5 - CPU Single 64Bit
1.6 Points (81%)
1.5 Points (77%)
Cinebench R10 - Rendering Single 32Bit
min: 5246     avg: 5255     median: 5252 (54%)     max: 5267 Points
min: 5018     avg: 5029.5     median: 5029 (52%)     max: 5041 Points
Cinebench R10 - Rendering Multiple CPUs 32Bit
min: 20438     avg: 20582     median: 20564 (31%)     max: 20744 Points
min: 10628     avg: 10810.5     median: 10810 (17%)     max: 10993 Points
Cinebench R10 - Rendering Multiple CPUs 64Bit
min: 25475     avg: 25599.7     median: 25624 (34%)     max: 25700 Points
min: 13307     avg: 13434.5     median: 13434 (18%)     max: 13562 Points
Cinebench R10 - Rendering Single CPUs 64Bit
min: 6506     avg: 6620.7     median: 6669 (64%)     max: 6687 Points
min: 6326     avg: 6414     median: 6414 (62%)     max: 6502 Points
wPrime 2.0x - 1024m *
min: 208     avg: 219.2     median: 215 (3%)     max: 233 seconds
471.2 seconds (6%)
wPrime 2.0x - 32m *
min: 6     avg: 7     median: 6 (1%)     max: 7 seconds
14.9 seconds (3%)
WinRAR - Result
min: 3467     avg: 4123.5     median: 4123 (48%)     max: 4780 KB/s
2940 KB/s (35%)
X264 HD Benchmark 4.0 - Pass 2
40.6 fps (23%)
19.9 fps (11%)
X264 HD Benchmark 4.0 - Pass 1
161.1 fps (60%)
105.3 fps (39%)
TrueCrypt - Serpent Mean 100MB
0.4 GB/s (19%)
0.2 GB/s (9%)
TrueCrypt - Twofish Mean 100MB
0.7 GB/s (22%)
0.3 GB/s (10%)
TrueCrypt - AES Mean 100MB
3.6 GB/s (18%)
1.7 GB/s (9%)
3DMark 06 - CPU
min: 7166     avg: 7181.7     median: 7176 (48%)     max: 7203 Points
min: 4267     avg: 4319.5     median: 4319 (29%)     max: 4372 Points
Super Pi mod 1.5 XS 1M *
9.2 Seconds (2%)
10.4 Seconds (2%)
Super Pi mod 1.5 XS 2M *
21.1 Seconds (1%)
23.9 Seconds (1%)
Super Pi Mod 1.5 XS 32M *
min: 518     avg: 525.5     median: 525 (2%)     max: 533 Seconds
557.4 Seconds (2%)
SiSoft Sandra Dhrystone (MIPS)
min: 147240     avg: 147620     median: 147620 (70%)     max: 148000 MIPS
SiSoft Sandra Whetstone (MFLOPS)
min: 89600     avg: 89630     median: 89630 (69%)     max: 89660 MFLOPS
Windows 7 Experience Index - Processor
7.7 points (110%)
7.3 points (104%)
3DMark Vantage - P CPU no PhysX 1280x1024
min: 25344     avg: 25795.3     median: 25885 (36%)     max: 26157 Points
11749 Points (16%)
3DMark 11 - Performance Physics 1280x720
min: 7611     avg: 8737     median: 9032 (46%)     max: 9568 points
min: 4391     avg: 4627     median: 4627 (24%)     max: 4863 points
3DMark - Ice Storm Standard Physics 1280x720
48410 Points (31%)
min: 40631     avg: 42022.5     median: 42022 (27%)     max: 43414 Points
3DMark - Cloud Gate Standard Physics 1280x720
7208 Points (18%)
min: 3424     avg: 3482.5     median: 3482 (9%)     max: 3541 Points
3DMark - Fire Strike Physics 1920x1080
9863 Points (30%)
min: 4929     avg: 4966     median: 4966 (15%)     max: 5003 Points

Average Benchmarks Intel Core i7-3940XM → 100%

Average Benchmarks Intel Core i7-3540M → 72%

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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)