Intel Core i7-6820HK vs Intel Core i7-6650U

Intel Core i7-6820HK

► remove Intel 6820HK

The Intel Core i7-6820HK is a quad-core processor based on the Skylake architecture, that has been launched in September 2015. In addition to four CPU cores with Hyper-Threading clocked at 2.7 - 3.6 GHz (4 cores: max. 3.2 GHz, 2 cores: max. 3.4 GHz), the chip also integrates an HD Graphics 530 GPU and a dual-channel DDR4-2133/DDR3L-1600 memory controller. The CPU is manufactured using a 14 nm process with FinFET transistors.

Currently, the i7-6820HK is the only Skylake chip with an unlocked multiplier for easy overclocking (similar to previous Extreme Editions).

Architecture

Skylake replaces both Haswell and Broadwell and brings the same microarchitecture in every TDP class from 4.5 to 45 W. The extensive improvements of the Skylake design include increased out-of-order buffers, optimized prefetching and branch prediction as well as additional performance gains through Hyper-Threading. Overall, however, performance per clock has been increased by only 5 to 10 percent (compared to Haswell) respectively under 5 percent (compard to Broadwell), which is quite modest for a new architecture ("Tock").

Performance

Tanks to the improved architecture, the Core i7-6820HK performs roughly on par with the former Core i7-4900MQ (Haswell) or the Core i7-5700HQ (Broadwell). Under long-lasting full load, the Skylake chip will take the lead over most of its Haswell-based predecessors, as the advanced 14 nm process leads to a higher energy efficiency and reduces throttling. If the 6820HK is overclocked (we've tested up to 4.0 GHz on all 4 cores), the performance will be even better.

Even the most demanding applications and excessive multitasking are handled easily.

Graphics

The integrated graphics unit called HD Graphics 530 represents the "GT2" version of the Skylake GPU (Intel Gen. 9). The 24 Execution Units, also called EUs, are clocked at 350 - 1050 MHz and offer a performance about 20 percent above the old HD Graphics 4600. Games of 2015 can thus be played smoothly in low or medium settings. For more information about performance and features, check our page for the HD Graphics 530.

Power Consumption

Specified at a TDP of 45 W (including CPU, GPU and memory controller), the CPU is best suited for bigger notebooks 15-inches in size and above. Optionally, the TDP can be lowered to 35 watts (cTDP down), reducing both heat dissipation and performance.

Intel Core i7-6650U

► remove Intel 6650U

The Intel Core i7-6650U is an ULV (ultra low voltage) dual-core SoC based on the Skylake architecture. In September 2015, it's the fastest CPU of the 15 W series (besides the i7-6600U) and can be found in ultrabooks as well as normal notebooks. In addition to two CPU cores with Hyper-Threading clocked at 2.2 - 3.4 GHz (2 cores: max. 3.2 GHz), the chip also integrates an Iris Graphics 540 GPU with 64 MB of dedicated eDRAM memory and a dual-channel DDR4-2133/DDR3L-1600 memory controller. The SoC is manufactured using a 14 nm process with FinFET transistors.

Architecture

Skylake replaces both Haswell and Broadwell and brings the same microarchitecture in every TDP class from 4.5 to 45 W. The extensive improvements of the Skylake design include increased out-of-order buffers, optimized prefetching and branch prediction as well as additional performance gains through Hyper-Threading. Overall, however, performance per clock has been increased by only 5 to 10 percent (compared to Haswell) respectively under 5 percent (compard to Broadwell), which is quite modest for a new architecture ("Tock").

Furthermore, the organisation of the eDRAM cache has been modified. Instead of acting like a victim cache, which has to be adressed via the L3/LLC, the eDRAM can now be adressed directly by programms just like the main memory. The size is still 128 MB for the quad-core models (4C + GT4e), while the dual-core chips (2C + GT3e) only offer 64 MB.

Performance

According to the specified clock rates and the improved architecture, the Core i7-6650U should perform similar to a Core i5-4310M (Haswell, 37 W) and is one of the fastest ULV dual-cores as of late 2015. Thus, the CPU has sufficient power for office and multimedia purposes as well as more demanding applications and multitasking.

Graphics

The integrated graphics unit called Iris Graphics 540 represents the "GT3e" version of the Skylake GPU (Intel Gen. 9). The 48 Execution Units, also called EUs, are clocked at 300 - 1050 MHz and offer (thanks to the fast eDRAM cache) a performance sligthly above a dedicated GeForce 920M. Games of 2015 can thus be played smoothly in low or medium settings. For more information about performance and features, check our page for the Iris Graphics 540.

Power Consumption

Specified at a TDP of 15 W (including CPU, GPU and memory controller), the CPU is best suited for small notebooks and ultrabooks (11-inches and above). Optionally, the TDP can be lowered to 9.5 watts (cTDP down), reducing both heat dissipation and performance and allowing even more compact designs.

Intel Core i7-6820HKIntel Core i7-6650U
Intel Core i7Intel Core i7
SkylakeSkylake
: Core i7 Skylake
Intel Core i7-6920HQ (compare)2900 - 3800 MHz4 / 88 MB
Intel Core i7-6970HQ (compare)2800 - 3700 MHz4 / 88 MB
Intel Core i7-6870HQ (compare)2700 - 3600 MHz4 / 88 MB
» Intel Core i7-6820HK2700 - 3600 MHz4 / 88 MB
Intel Core i7-6820HQ (compare)2700 - 3600 MHz4 / 88 MB
Intel Core i7-6770HQ (compare)2600 - 3500 MHz4 / 86 MB
Intel Core i7-6700HQ (compare)2600 - 3500 MHz4 / 86 MB
Intel Core i7-6567U (compare)3300 - 3600 MHz2 / 44 MB
Intel Core i7-6600U (compare)2600 - 3400 MHz2 / 44 MB
Intel Core i7-6650U2200 - 3400 MHz2 / 44 MB
Intel Core i7-6560U (compare)2200 - 3200 MHz2 / 44 MB
Intel Core i7-6500U (compare)2500 - 3100 MHz2 / 44 MB
Intel Core i7-6920HQ (compare)2900 - 3800 MHz4 / 88 MB
Intel Core i7-6970HQ (compare)2800 - 3700 MHz4 / 88 MB
Intel Core i7-6870HQ (compare)2700 - 3600 MHz4 / 88 MB
Intel Core i7-6820HK2700 - 3600 MHz4 / 88 MB
Intel Core i7-6820HQ (compare)2700 - 3600 MHz4 / 88 MB
Intel Core i7-6770HQ (compare)2600 - 3500 MHz4 / 86 MB
Intel Core i7-6700HQ (compare)2600 - 3500 MHz4 / 86 MB
Intel Core i7-6567U (compare)3300 - 3600 MHz2 / 44 MB
Intel Core i7-6600U (compare)2600 - 3400 MHz2 / 44 MB
» Intel Core i7-6650U2200 - 3400 MHz2 / 44 MB
Intel Core i7-6560U (compare)2200 - 3200 MHz2 / 44 MB
Intel Core i7-6500U (compare)2500 - 3100 MHz2 / 44 MB
2700 - 3600 MHz2200 - 3400 MHz
256 KB128 KB
1 MB512 KB
8 MB4 MB
4 / 82 / 4
45 15
14 14
122 mm2
100 °C100 °C
BGABGA
Dual-Channel DDR3L-1600/DDR4-2133 Memory Controller, AVX, AVX2, Quick Sync, Virtualization, AES-NIDual-Channel DDR3L-1600/DDR4-2133 Memory Controller, HyperThreading, AVX, AVX2, Quick Sync, Virtualization, AES-NI, vPro, TXT
iGPUIntel HD Graphics 530 (350 - 1050 MHz)Intel Iris Graphics 540 (300 - 1050 MHz)
$378 U.S.$415 U.S.
Intel Core i7 6820HKIntel Core i7 6650U

Cinebench R15 - CPU Multi 64Bit
min: 687     avg: 739.2     median: 709 (16%)     max: 836 Points
342 Points (8%)
Cinebench R15 - CPU Single 64Bit
min: 134     avg: 153.9     median: 152 (70%)     max: 172 Points
132 Points (61%)
Cinebench R11.5 - CPU Multi 64Bit
min: 7     avg: 8.1     median: 7 (16%)     max: 9 Points
3.8 Points (9%)
Cinebench R11.5 - CPU Single 64Bit
1.8 Points (88%)
1.5 Points (76%)
Cinebench R10 - Rendering Single 32Bit
min: 5559     avg: 5775.6     median: 5653 (58%)     max: 6405 Points
5223 Points (54%)
Cinebench R10 - Rendering Multiple CPUs 32Bit
min: 20910     avg: 21773.6     median: 21165 (32%)     max: 24966 Points
11564 Points (18%)
Cinebench R10 - Rendering Multiple CPUs 64Bit
min: 27271     avg: 27498     median: 27479 (36%)     max: 27762 Points
14833 Points (20%)
Cinebench R10 - Rendering Single CPUs 64Bit
min: 7217     avg: 7316     median: 7313 (71%)     max: 7421 Points
6787 Points (66%)
wPrime 2.0x - 1024m *
min: 210     avg: 229.7     median: 224 (3%)     max: 296 seconds
445.6 seconds (5%)
wPrime 2.0x - 32m *
min: 6     avg: 7.4     median: 7 (1%)     max: 9 seconds
14.9 seconds (3%)
WinRAR - Result
min: 5314     avg: 5369.3     median: 5314 (62%)     max: 5480 KB/s
X264 HD Benchmark 4.0 - Pass 2
min: 43     avg: 45.1     median: 44 (1%)     max: 50 fps
X264 HD Benchmark 4.0 - Pass 1
min: 160     avg: 171.5     median: 165 (61%)     max: 190 fps
TrueCrypt - Serpent Mean 100MB
0.4 GB/s (20%)
0.2 GB/s (10%)
TrueCrypt - Twofish Mean 100MB
0.7 GB/s (22%)
0.3 GB/s (11%)
TrueCrypt - AES Mean 100MB
min: 2     avg: 3.9     median: 3 (15%)     max: 4 GB/s
2 GB/s (10%)
3DMark 06 - CPU
min: 7234     avg: 7601.2     median: 7410 (50%)     max: 8697 Points
Super Pi mod 1.5 XS 1M *
min: 9     avg: 10     median: 10 (2%)     max: 10 Seconds
11.7 Seconds (3%)
Super Pi mod 1.5 XS 2M *
min: 20     avg: 22.3     median: 22 (1%)     max: 23 Seconds
26.3 Seconds (1%)
Super Pi Mod 1.5 XS 32M *
min: 486     avg: 532.4     median: 535 (2%)     max: 572 Seconds
612.8 Seconds (3%)
3DMark Vantage - P CPU no PhysX 1280x1024
min: 26017     avg: 26255.7     median: 26272 (37%)     max: 26478 Points
3DMark 11 - Performance Physics 1280x720
min: 8220     avg: 9611.8     median: 9468 (49%)     max: 10925 points
4919 points (25%)
3DMark - Ice Storm Standard Physics 1280x720
min: 43579     avg: 49275.5     median: 47533 (31%)     max: 58061 Points
44259 Points (28%)
3DMark - Ice Storm Extreme Physics 1920x1080
min: 43592     avg: 49505.6     median: 47817 (57%)     max: 56227 Points
43694 Points (52%)
3DMark - Ice Storm Unlimited Physics 1280x720 offscreen
min: 45688     avg: 49381.4     median: 47727 (55%)     max: 55770 Points
44857 Points (52%)
3DMark - Cloud Gate Standard Physics 1280x720
min: 6663     avg: 7659.7     median: 7388 (19%)     max: 8824 Points
3639 Points (9%)
3DMark - Fire Strike Physics 1920x1080
min: 9695     avg: 10671.8     median: 10219 (31%)     max: 12239 Points
5372 Points (17%)
Geekbench 3 - 32 Bit Multi-Core Score
13486 Points (17%)
Geekbench 3 - 32 Bit Single-Core Score
3819 Points (78%)
Geekbench 3 - 64 Bit Multi-Core Score
14128 Points (38%)
Geekbench 3 - 64 Bit Single-Core Score
3983 Points (81%)
Mozilla Kraken 1.1 - Total Score *
min: 923     avg: 1121.9     median: 966 (2%)     max: 1631 ms
Sunspider - 1.0 Total Score *
min: 65     avg: 78.8     median: 69 (1%)     max: 95 ms
Octane V2 - Total Score
min: 16177     avg: 34770.5     median: 36903 (70%)     max: 44322 Points

Average Benchmarks Intel Core i7-6820HK → 100%

Average Benchmarks Intel Core i7-6650U → 78%

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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)