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Intel Core i7-3940XM vs Intel Core i7-3840QM

Intel Core i7-3940XM

► remove from comparison 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 i7-3840QM

► remove from comparison 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.

ModelIntel Core i7-3940XMIntel Core i7-3840QM
SeriesIntel Core i7Intel Core i7
CodenameIvy BridgeIvy Bridge
Series: Core i7 Ivy Bridge
» Intel Core i7-3940XM3 - 3.9 GHz4 / 88 MB
Intel Core i7-3920XM compare2.9 - 3.8 GHz4 / 88 MB
Intel Core i7-3840QM2.8 - 3.8 GHz4 / 88 MB
Intel Core i7-3820QM compare2.7 - 3.7 GHz4 / 88 MB
Intel Core i7-3740QM compare2.7 - 3.7 GHz4 / 86 MB
Intel Core i7-3720QM compare2.6 - 3.6 GHz4 / 86 MB
Intel Core i7-3635QM compare2.4 - 3.4 GHz4 / 86 MB
Intel Core i7-3630QM compare2.4 - 3.4 GHz4 / 86 MB
Intel Core i7-3615QM compare2.3 - 3.3 GHz4 / 86 MB
Intel Core i7-3610QM compare2.3 - 3.3 GHz4 / 86 MB
Intel Core i7-3632QM compare2.2 - 3.2 GHz4 / 86 MB
Intel Core i7-3612QM compare2.1 - 3.1 GHz4 / 86 MB
Intel Core i7-3540M compare3 - 3.7 GHz2 / 44 MB
Intel Core i7-3520M compare2.9 - 3.6 GHz2 / 44 MB
Intel Core i7-3687U compare2.1 - 3.3 GHz2 / 44 MB
Intel Core i7-3667U compare2 - 3.2 GHz2 / 44 MB
Intel Core i7-3537U compare2 - 3.1 GHz2 / 44 MB
Intel Core i7-3517U compare1.9 - 3 GHz2 / 44 MB
Intel Core i7-3689Y compare1.5 - 2.6 GHz2 / 44 MB
Intel Core i7-3940XM3 - 3.9 GHz4 / 88 MB
Intel Core i7-3920XM compare2.9 - 3.8 GHz4 / 88 MB
» Intel Core i7-3840QM2.8 - 3.8 GHz4 / 88 MB
Intel Core i7-3820QM compare2.7 - 3.7 GHz4 / 88 MB
Intel Core i7-3740QM compare2.7 - 3.7 GHz4 / 86 MB
Intel Core i7-3720QM compare2.6 - 3.6 GHz4 / 86 MB
Intel Core i7-3635QM compare2.4 - 3.4 GHz4 / 86 MB
Intel Core i7-3630QM compare2.4 - 3.4 GHz4 / 86 MB
Intel Core i7-3615QM compare2.3 - 3.3 GHz4 / 86 MB
Intel Core i7-3610QM compare2.3 - 3.3 GHz4 / 86 MB
Intel Core i7-3632QM compare2.2 - 3.2 GHz4 / 86 MB
Intel Core i7-3612QM compare2.1 - 3.1 GHz4 / 86 MB
Intel Core i7-3540M compare3 - 3.7 GHz2 / 44 MB
Intel Core i7-3520M compare2.9 - 3.6 GHz2 / 44 MB
Intel Core i7-3687U compare2.1 - 3.3 GHz2 / 44 MB
Intel Core i7-3667U compare2 - 3.2 GHz2 / 44 MB
Intel Core i7-3537U compare2 - 3.1 GHz2 / 44 MB
Intel Core i7-3517U compare1.9 - 3 GHz2 / 44 MB
Intel Core i7-3689Y compare1.5 - 2.6 GHz2 / 44 MB
Clock3000 - 3900 MHz2800 - 3800 MHz
L1 Cache256 KB256 KB
L2 Cache1 MB1 MB
L3 Cache8 MB8 MB
Cores / Threads4 / 84 / 8
TDP55 Watt45 Watt
Transistors1400 Million1400 Million
Technology22 nm22 nm
Die Size160 mm2160 mm2
max. Temp.105 °C105 °C
SocketFCPGA988
FeaturesHD Graphics 4000, DDR3(L)-1600 Memory Controller, HyperThreading, AVX, Quick Sync, VirtualizationHD Graphics 4000, DDR3(L)-1600 Memory Controller, HyperThreading, AVX, Quick Sync, Virtualization
iGPUIntel HD Graphics 4000 (650 - 1350 MHz)Intel HD Graphics 4000 (650 - 1300 MHz)
Architecturex86x86
$1096 U.S.$568 U.S.
Announced

Benchmarks

Cinebench R11.5 - Cinebench R11.5 CPU Multi 64 Bit
min: 7.45     avg: 7.5     median: 7.5 (14%)     max: 7.46 Points
min: 7     avg: 7.1     median: 7.1 (13%)     max: 7.15 Points
Cinebench R11.5 - Cinebench R11.5 CPU Single 64 Bit
min: 1.62     avg: 1.6     median: 1.6 (46%)     max: 1.63 Points
min: 1.58     avg: 1.6     median: 1.6 (45%)     max: 1.59 Points
Cinebench R10 - Cinebench R10 Rend. Single (32bit)
min: 5246     avg: 5255     median: 5252 (47%)     max: 5267 Points
min: 5137     avg: 5145     median: 5144.5 (46%)     max: 5152 Points
Cinebench R10 - Cinebench R10 Rend. Multi (32bit)
min: 20438     avg: 20582     median: 20564 (28%)     max: 20744 Points
min: 20132     avg: 20135     median: 20135 (28%)     max: 20138 Points
Cinebench R10 - Cinebench R10 Rend. Multi (64bit)
min: 25475     avg: 25600     median: 25624 (23%)     max: 25700 Points
min: 25111     avg: 25178     median: 25178 (22%)     max: 25245 Points
Cinebench R10 - Cinebench R10 Rend. Single (64bit)
min: 6506     avg: 6621     median: 6669 (41%)     max: 6687 Points
min: 6405     avg: 6478     median: 6478 (40%)     max: 6551 Points
wPrime 2.10 - wPrime 2.0 1024m *
min: 208.8     avg: 219.2     median: 215.7 (3%)     max: 233 s
min: 245     avg: 246.3     median: 246.3 (3%)     max: 247.5 s
wPrime 2.10 - wPrime 2.0 32m *
min: 6.8     avg: 7     median: 7 (1%)     max: 7.169 s
min: 7.348     avg: 7.4     median: 7.4 (1%)     max: 7.441 s
WinRAR - WinRAR 4.0
min: 3467     avg: 4124     median: 4123.5 (24%)     max: 4780 Points
4712 Points (27%)
X264 HD Benchmark 4.0 - x264 Pass 2
40.6 fps (18%)
min: 37.11     avg: 38.2     median: 38.2 (17%)     max: 39.23 fps
X264 HD Benchmark 4.0 - x264 Pass 1
161.1 fps (44%)
min: 156.2     avg: 157.8     median: 157.8 (43%)     max: 159.4 fps
TrueCrypt - TrueCrypt Serpent
min: 0.373     avg: 0.4     median: 0.4 (13%)     max: 0.386 GB/s
min: 0.375     avg: 0.4     median: 0.4 (13%)     max: 0.376 GB/s
TrueCrypt - TrueCrypt Twofish
min: 0.64     avg: 0.7     median: 0.7 (14%)     max: 0.66 GB/s
min: 0.638     avg: 0.6     median: 0.6 (13%)     max: 0.642 GB/s
TrueCrypt - TrueCrypt AES
min: 3.5     avg: 3.6     median: 3.7 (14%)     max: 3.7 GB/s
3.6 GB/s (13%)
3DMark 06 - CPU - 3DMark 06 - CPU
min: 7166     avg: 7182     median: 7176 (15%)     max: 7203 Points
min: 6946     avg: 6998     median: 6998 (15%)     max: 7050 Points
Super Pi mod 1.5 XS 1M - Super Pi mod 1.5 XS 1M *
min: 9     avg: 9.2     median: 9 (2%)     max: 9.554 s
min: 9     avg: 9.4     median: 9.4 (2%)     max: 9.703 s
Super Pi mod 1.5 XS 2M - Super Pi mod 1.5 XS 2M *
min: 21     avg: 21.1     median: 21 (1%)     max: 21.26 s
min: 21.97     avg: 22     median: 22 (1%)     max: 22 s
Super Pi Mod 1.5 XS 32M - Super Pi mod 1.5 XS 32M *
min: 518     avg: 526     median: 525.5 (2%)     max: 533 s
541 s (2%)
SiSoft Sandra Dhrystone (MIPS) - SiSoft Sandra Dhrystone (MIPS)
min: 147240     avg: 147620     median: 147620 (70%)     max: 148000 MIPS
124100 MIPS (59%)
SiSoft Sandra Whetstone (MFLOPS) - SiSoft Sandra Whetstone (MFLOPS)
min: 89600     avg: 89630     median: 89630 (69%)     max: 89660 MFLOPS
85000 MFLOPS (65%)
Windows 7 Experience Index - Win7 CPU
7.7 Points (99%)
7.7 Points (99%)
3DMark Vantage - 3DM Vant. Perf. CPU no Physx
min: 25344     avg: 25795     median: 25885 (26%)     max: 26157 Points
min: 24545     avg: 24741     median: 24740.5 (25%)     max: 24936 Points
3DMark 11 - 3DM11 Performance Physics
min: 7611     avg: 8737     median: 9032 (31%)     max: 9568 Points
min: 7360     avg: 7787     median: 7786.5 (27%)     max: 8213 Points
3DMark - 3DMark Ice Storm Physics
100%
1 3940XM +
48410 Points (31%)
3DMark - 3DMark Cloud Gate Physics
100%
1 3940XM +
7208 Points (18%)
3DMark - 3DMark Fire Strike Standard Physics
100%
1 3940XM +
9863 Points (24%)

Average Benchmarks Intel Core i7-3940XM → 100% n=23

Average Benchmarks Intel Core i7-3840QM → 97% n=23

- Range of benchmark values for this graphics card
- Average benchmark values for this graphics card
* Smaller numbers mean a higher performance
1 This benchmark is not used for the average calculation

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show all (including archived), 2022, 2021
v1.17
log 02. 23:05:58

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