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Intel Core i7-3820QM vs Intel Core i7-3940XM vs Intel Core i7-3687U

Intel Core i7-3820QM

► remove from comparison Intel 3820QM

The Intel Core i7-3820QM is a fast quad-core processor for laptops based on the Ivy Bridge architecture. 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 2.7 GHz but can dynamically increase clock rates with Turbo Boost up to 3.5 GHz (for 4 active cores), 3.6 GHz (for 2 active cores) and 3.7 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 i7-3820QM is slightly above a similarly clocked Sandy Bridge processor due to slight architectural improvements. As a result, overall performance is clearly higher than the former fastest model, the Core i7-2920XM.

The integrated Intel HD Graphics 4000 offers 16 Execution Units (EUs) clocked at 650 MHz up to 1250 MHz with Turbo Boost, making it one of the faster variants.

As with most quad-core Ivy Bridge models, the Core i7-3820QM 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 i7-3940XM

► 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 i7-3687U

► remove from comparison

The Intel Core i7-3687U is the fastest ULV-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 2.1 GHz but can dynamically increase clock rates with Turbo Boost up to 3.1 GHz (for 2 active cores) and 3.3 GHz (for 1 active core). As its Sandy-Bridge-based predecessors, 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 i7-3687U is slightly above a similarly clocked Sandy Bridge processor due to the architectural improvements. Therefore, and because of the higher clock speed, the old Core i7-2677M is easily outperformed.

The integrated Intel HD Graphics 4000 offers 16 Execution Units (EUs) clocked at 350 MHz up to 1200 MHz with Turbo Boost, delivering a performance comparable with an AMD Radeon HD 6620G.

The ULV-CPUs are rated at a TDP of 17 W including graphics card and memory controller.  Therefore, the CPU is suited for small laptops and ultrabooks.

ModelIntel Core i7-3820QMIntel Core i7-3940XMIntel Core i7-3687U
SeriesIntel Core i7Intel Core i7Intel Core i7
CodenameIvy BridgeIvy BridgeIvy Bridge
Series: Core i7 Ivy Bridge
Intel Core i7-3940XM3 - 3.9 GHz4 / 8 cores8 MB L3
Intel Core i7-3920XM2.9 - 3.8 GHz4 / 8 cores8 MB L3
Intel Core i7-3840QM2.8 - 3.8 GHz4 / 8 cores8 MB L3
Intel Core i7-3820QM « 2.7 - 3.7 GHz4 / 8 cores8 MB L3
Intel Core i7-3740QM2.7 - 3.7 GHz4 / 8 cores6 MB L3
Intel Core i7-3720QM2.6 - 3.6 GHz4 / 8 cores6 MB L3
Intel Core i7-3635QM2.4 - 3.4 GHz4 / 8 cores6 MB L3
Intel Core i7-3630QM2.4 - 3.4 GHz4 / 8 cores6 MB L3
Intel Core i7-3615QM2.3 - 3.3 GHz4 / 8 cores6 MB L3
Intel Core i7-3610QM2.3 - 3.3 GHz4 / 8 cores6 MB L3
Intel Core i7-3632QM2.2 - 3.2 GHz4 / 8 cores6 MB L3
Intel Core i7-3612QM2.1 - 3.1 GHz4 / 8 cores6 MB L3
Intel Core i7-3540M3 - 3.7 GHz2 / 4 cores4 MB L3
Intel Core i7-3520M2.9 - 3.6 GHz2 / 4 cores4 MB L3
Intel Core i7-3687U2.1 - 3.3 GHz2 / 4 cores4 MB L3
Intel Core i7-3667U2 - 3.2 GHz2 / 4 cores4 MB L3
Intel Core i7-3537U2 - 3.1 GHz2 / 4 cores4 MB L3
Intel Core i7-3517U1.9 - 3 GHz2 / 4 cores4 MB L3
Intel Core i7-3689Y1.5 - 2.6 GHz2 / 4 cores4 MB L3
Intel Core i7-3940XM « 3 - 3.9 GHz4 / 8 cores8 MB L3
Intel Core i7-3920XM2.9 - 3.8 GHz4 / 8 cores8 MB L3
Intel Core i7-3840QM2.8 - 3.8 GHz4 / 8 cores8 MB L3
Intel Core i7-3820QM2.7 - 3.7 GHz4 / 8 cores8 MB L3
Intel Core i7-3740QM2.7 - 3.7 GHz4 / 8 cores6 MB L3
Intel Core i7-3720QM2.6 - 3.6 GHz4 / 8 cores6 MB L3
Intel Core i7-3635QM2.4 - 3.4 GHz4 / 8 cores6 MB L3
Intel Core i7-3630QM2.4 - 3.4 GHz4 / 8 cores6 MB L3
Intel Core i7-3615QM2.3 - 3.3 GHz4 / 8 cores6 MB L3
Intel Core i7-3610QM2.3 - 3.3 GHz4 / 8 cores6 MB L3
Intel Core i7-3632QM2.2 - 3.2 GHz4 / 8 cores6 MB L3
Intel Core i7-3612QM2.1 - 3.1 GHz4 / 8 cores6 MB L3
Intel Core i7-3540M3 - 3.7 GHz2 / 4 cores4 MB L3
Intel Core i7-3520M2.9 - 3.6 GHz2 / 4 cores4 MB L3
Intel Core i7-3687U2.1 - 3.3 GHz2 / 4 cores4 MB L3
Intel Core i7-3667U2 - 3.2 GHz2 / 4 cores4 MB L3
Intel Core i7-3537U2 - 3.1 GHz2 / 4 cores4 MB L3
Intel Core i7-3517U1.9 - 3 GHz2 / 4 cores4 MB L3
Intel Core i7-3689Y1.5 - 2.6 GHz2 / 4 cores4 MB L3
Intel Core i7-3940XM3 - 3.9 GHz4 / 8 cores8 MB L3
Intel Core i7-3920XM2.9 - 3.8 GHz4 / 8 cores8 MB L3
Intel Core i7-3840QM2.8 - 3.8 GHz4 / 8 cores8 MB L3
Intel Core i7-3820QM2.7 - 3.7 GHz4 / 8 cores8 MB L3
Intel Core i7-3740QM2.7 - 3.7 GHz4 / 8 cores6 MB L3
Intel Core i7-3720QM2.6 - 3.6 GHz4 / 8 cores6 MB L3
Intel Core i7-3635QM2.4 - 3.4 GHz4 / 8 cores6 MB L3
Intel Core i7-3630QM2.4 - 3.4 GHz4 / 8 cores6 MB L3
Intel Core i7-3615QM2.3 - 3.3 GHz4 / 8 cores6 MB L3
Intel Core i7-3610QM2.3 - 3.3 GHz4 / 8 cores6 MB L3
Intel Core i7-3632QM2.2 - 3.2 GHz4 / 8 cores6 MB L3
Intel Core i7-3612QM2.1 - 3.1 GHz4 / 8 cores6 MB L3
Intel Core i7-3540M3 - 3.7 GHz2 / 4 cores4 MB L3
Intel Core i7-3520M2.9 - 3.6 GHz2 / 4 cores4 MB L3
Intel Core i7-3687U « 2.1 - 3.3 GHz2 / 4 cores4 MB L3
Intel Core i7-3667U2 - 3.2 GHz2 / 4 cores4 MB L3
Intel Core i7-3537U2 - 3.1 GHz2 / 4 cores4 MB L3
Intel Core i7-3517U1.9 - 3 GHz2 / 4 cores4 MB L3
Intel Core i7-3689Y1.5 - 2.6 GHz2 / 4 cores4 MB L3
Clock2700 - 3700 MHz3000 - 3900 MHz2100 - 3300 MHz
L1 Cache256 KB256 KB128 KB
L2 Cache1 MB1 MB512 KB
L3 Cache8 MB8 MB4 MB
Cores / Threads4 / 84 / 82 / 4
TDP45 Watt55 Watt17 Watt
Transistors1400 Million1400 Million
Technology22 nm22 nm22 nm
Die Size160 mm2160 mm2
max. Temp.105 °C105 °C105 °C
FeaturesHD Graphics 4000, DDR3(L)-1600 Memory Controller, HyperThreading, AVX, Quick Sync, VirtualizationHD Graphics 4000, DDR3(L)-1600 Memory Controller, HyperThreading, AVX, Quick Sync, VirtualizationHD Graphics 4000 (350-1200 MHz), Turbo 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 Bit
iGPUIntel HD Graphics 4000 (650 - 1250 MHz)Intel HD Graphics 4000 (650 - 1350 MHz)Intel HD Graphics 4000 (350 - 1200 MHz)
Architecturex86x86x86
Announced
Manufacturerark.intel.comark.intel.com
SocketFCPGA988BGA1023
$1096 U.S.

Benchmarks

Cinebench R11.5 - Cinebench R11.5 CPU Multi 64 Bit
100%
1 3820QM +
min: 6.68     avg: 6.8     median: 6.8 (9%)     max: 6.94 Points
110%
1 3940XM +
min: 7.45     avg: 7.5     median: 7.5 (10%)     max: 7.46 Points
Cinebench R11.5 - Cinebench R11.5 CPU Single 64 Bit
100%
1 3820QM +
1.5 Points (38%)
106%
1 3940XM +
min: 1.62     avg: 1.6     median: 1.6 (40%)     max: 1.63 Points
Cinebench R10 - Cinebench R10 Rend. Single (32bit)
100%
1 3820QM +
min: 4910     avg: 4986     median: 5008 (30%)     max: 5039 Points
105%
1 3940XM +
min: 5246     avg: 5255     median: 5252 (32%)     max: 5267 Points
Cinebench R10 - Cinebench R10 Rend. Multi (32bit)
100%
1 3820QM +
min: 19326     avg: 19491     median: 19364 (14%)     max: 19782 Points
106%
1 3940XM +
min: 20438     avg: 20582     median: 20564 (15%)     max: 20744 Points
Cinebench R10 - Cinebench R10 Rend. Multi (64bit)
100%
1 3820QM +
min: 23605     avg: 24083     median: 24069 (17%)     max: 24448 Points
106%
1 3940XM +
min: 25475     avg: 25600     median: 25624 (18%)     max: 25700 Points
Cinebench R10 - Cinebench R10 Rend. Single (64bit)
100%
1 3820QM +
min: 6187     avg: 6245     median: 6214 (8%)     max: 6398 Points
107%
1 3940XM +
min: 6506     avg: 6621     median: 6669 (8%)     max: 6687 Points
wPrime 2.10 - wPrime 2.0 1024m *
100%
1 3820QM +
min: 223.9     avg: 236.3     median: 236.3 (3%)     max: 248.6 s
100%
1 3940XM +
min: 208.8     avg: 219.2     median: 215.7 (3%)     max: 233 s
wPrime 2.10 - wPrime 2.0 32m *
100%
1 3820QM +
min: 7.314     avg: 7.5     median: 7.5 (2%)     max: 7.612 s
100%
1 3940XM +
min: 6.8     avg: 7     median: 7 (1%)     max: 7.169 s
WinRAR - WinRAR 4.0
100%
1 3820QM +
min: 4530     avg: 4575     median: 4575 (7%)     max: 4620 Points
90%
1 3940XM +
min: 3467     avg: 4124     median: 4123.5 (7%)     max: 4780 Points
X264 HD Benchmark 4.0 - x264 Pass 2
100%
1 3820QM +
min: 37.1     avg: 37.2     median: 37.2 (13%)     max: 37.24 fps
109%
1 3940XM +
40.6 fps (14%)
X264 HD Benchmark 4.0 - x264 Pass 1
100%
1 3820QM +
min: 147.9     avg: 150.4     median: 150.4 (35%)     max: 152.9 fps
107%
1 3940XM +
161.1 fps (37%)
TrueCrypt - TrueCrypt Serpent
100%
1 3820QM +
0.4 GB/s (0%)
104%
1 3940XM +
min: 0.373     avg: 0.4     median: 0.4 (0%)     max: 0.386 GB/s
TrueCrypt - TrueCrypt Twofish
100%
1 3820QM +
0.6 GB/s (11%)
105%
1 3940XM +
min: 0.64     avg: 0.7     median: 0.7 (11%)     max: 0.66 GB/s
TrueCrypt - TrueCrypt AES
100%
1 3820QM +
3.5 GB/s (9%)
106%
1 3940XM +
min: 3.5     avg: 3.6     median: 3.7 (10%)     max: 3.7 GB/s
3DMark 06 - CPU - 3DMark 06 - CPU
100%
1 3820QM +
min: 6720     avg: 6832     median: 6849 (15%)     max: 6910 Points
105%
1 3940XM +
min: 7166     avg: 7182     median: 7176 (15%)     max: 7203 Points
Super Pi mod 1.5 XS 1M - Super Pi mod 1.5 XS 1M *
100%
1 3820QM +
min: 10     avg: 10.1     median: 10 (2%)     max: 10.39 s
100%
1 3940XM +
min: 9     avg: 9.2     median: 9 (2%)     max: 9.554 s
Super Pi mod 1.5 XS 2M - Super Pi mod 1.5 XS 2M *
100%
1 3820QM +
min: 22     avg: 22.6     median: 22 (1%)     max: 23.7 s
100%
1 3940XM +
min: 21     avg: 21.1     median: 21 (1%)     max: 21.26 s
Super Pi Mod 1.5 XS 32M - Super Pi mod 1.5 XS 32M *
100%
1 3820QM +
min: 550     avg: 555     median: 554.5 (2%)     max: 559 s
100%
1 3940XM +
min: 518     avg: 526     median: 525.5 (2%)     max: 533 s
SiSoft Sandra Dhrystone (MIPS) - SiSoft Sandra Dhrystone (MIPS)
100%
1 3820QM +
min: 134350     avg: 136990     median: 136990 (65%)     max: 139630 MIPS
108%
1 3940XM +
min: 147240     avg: 147620     median: 147620 (70%)     max: 148000 MIPS
SiSoft Sandra Whetstone (MFLOPS) - SiSoft Sandra Whetstone (MFLOPS)
100%
1 3820QM +
min: 84860     avg: 85585     median: 85585 (66%)     max: 86310 MFLOPS
105%
1 3940XM +
min: 89600     avg: 89630     median: 89630 (69%)     max: 89660 MFLOPS
Windows 7 Experience Index - Win7 CPU
100%
1 3820QM +
min: 7.5     avg: 7.6     median: 7.6 (97%)     max: 7.7 Points
101%
1 3940XM +
7.7 Points (99%)
3DMark Vantage - 3DM Vant. Perf. CPU no Physx
100%
1 3820QM +
min: 23042     avg: 23979     median: 24158 (21%)     max: 24792 Points
107%
1 3940XM +
min: 25344     avg: 25795     median: 25885 (23%)     max: 26157 Points
3DMark 11 - 3DM11 Performance Physics
100%
1 3820QM +
min: 8825     avg: 9006     median: 9040 (24%)     max: 9118 Points
100%
1 3940XM +
min: 7611     avg: 8737     median: 9032 (24%)     max: 9568 Points
3DMark - 3DMark Ice Storm Physics
100%
1 3940XM +
48410 Points (39%)
3DMark - 3DMark Cloud Gate Physics
100%
1 3940XM +
7208 Points (18%)
3DMark - 3DMark Fire Strike Standard Physics
100%
1 3940XM +
9863 Points (18%)

Average Benchmarks Intel Core i7-3820QM → 0% n=

Average Benchmarks Intel Core i7-3940XM → 0% n=

- 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

v1.26
log 16. 11:48:32

#0 checking url part for id 3063 +0s ... 0s

#1 checking url part for id 3345 +0s ... 0s

#2 checking url part for id 3630 +0s ... 0s

#3 not redirecting to Ajax server +0s ... 0s

#4 did not recreate cache, as it is less than 5 days old! Created at Tue, 16 Apr 2024 05:37:29 +0200 +0.001s ... 0.001s

#5 composed specs +0.032s ... 0.033s

#6 did output specs +0s ... 0.033s

#7 getting avg benchmarks for device 3063 +0.003s ... 0.036s

#8 got single benchmarks 3063 +0.031s ... 0.067s

#9 getting avg benchmarks for device 3345 +0.003s ... 0.07s

#10 got single benchmarks 3345 +0.011s ... 0.081s

#11 getting avg benchmarks for device 3630 +0.002s ... 0.083s

#12 got single benchmarks 3630 +0s ... 0.083s

#13 got avg benchmarks for devices +0s ... 0.083s

#14 min, max, avg, median took s +0.163s ... 0.246s

#15 return log +0s ... 0.246s

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Redaktion, 2017-09- 8 (Update: 2023-07- 1)