Intel Core i7-3840QM vs Intel Core i7-3687U

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 i7-3687U

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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.

Intel Core i7-3840QMIntel Core i7-3687U
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 i7-3540M (compare)3000 - 3700 MHz2 / 44 MB
Intel Core i7-3520M (compare)2900 - 3600 MHz2 / 44 MB
Intel Core i7-3687U2100 - 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 i7-3540M (compare)3000 - 3700 MHz2 / 44 MB
Intel Core i7-3520M (compare)2900 - 3600 MHz2 / 44 MB
» Intel Core i7-3687U2100 - 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 MHz2100 - 3300 MHz
256 KB128 KB
1 MB512 KB
8 MB4 MB
4 / 82 / 4
45 17
1400
22 22
160 mm2
105 °C105 °C
HD 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 - 1300 MHz)Intel HD Graphics 4000 (350 - 1200 MHz)
$568 U.S.
BGA1023
Intel Core i7 3687U

Cinebench R11.5 - CPU Multi 64Bit
min: 7     avg: 7.1     median: 7.1 (18%)     max: 7.15 Points
Cinebench R11.5 - CPU Single 64Bit
min: 1.58     avg: 1.6     median: 1.6 (64%)     max: 1.59 Points
Cinebench R10 - Rendering Single 32Bit
min: 5137     avg: 5145     median: 5144.5 (53%)     max: 5152 Points
Cinebench R10 - Rendering Multiple CPUs 32Bit
min: 20132     avg: 20135     median: 20135 (34%)     max: 20138 Points
Cinebench R10 - Rendering Multiple CPUs 64Bit
min: 25111     avg: 25178     median: 25178 (33%)     max: 25245 Points
Cinebench R10 - Rendering Single CPUs 64Bit
min: 6405     avg: 6478     median: 6478 (60%)     max: 6551 Points
wPrime 2.0x - 1024m *
min: 245     avg: 246     median: 246.2 (3%)     max: 247.481 seconds
wPrime 2.0x - 32m *
min: 7.348     avg: 7.4     median: 7.4 (1%)     max: 7.441 seconds
WinRAR - Result
4712 KB/s (55%)
X264 HD Benchmark 4.0 - Pass 2
min: 37.11     avg: 38.2     median: 38.2 (24%)     max: 39.23 fps
X264 HD Benchmark 4.0 - Pass 1
min: 156.2     avg: 158     median: 157.8 (56%)     max: 159.37 fps
TrueCrypt - Serpent Mean 100MB
min: 0.375     avg: 0.4     median: 0.4 (20%)     max: 0.376 GB/s
TrueCrypt - Twofish Mean 100MB
min: 0.638     avg: 0.6     median: 0.6 (20%)     max: 0.642 GB/s
TrueCrypt - AES Mean 100MB
3.6 GB/s (18%)
3DMark 06 - CPU
min: 6946     avg: 6998     median: 6998 (47%)     max: 7050 Points
Super Pi mod 1.5 XS 1M *
min: 9     avg: 9.4     median: 9.4 (2%)     max: 9.703 Seconds
Super Pi mod 1.5 XS 2M *
min: 21.965     avg: 22     median: 22 (1%)     max: 22 Seconds
Super Pi Mod 1.5 XS 32M *
541 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%)
3DMark Vantage - P CPU no PhysX 1280x1024
min: 24545     avg: 24741     median: 24740.5 (35%)     max: 24936 Points
3DMark 11 - Performance Physics 1280x720
min: 7360     avg: 7787     median: 7786.5 (38%)     max: 8213 points

Average Benchmarks Intel Core i7-3840QM → 100%

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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)