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Core i7-6820HQ vs i7-6700HQ


Description
Both models i7-6820HQ and i7-6700HQ are based on Skylake architecture.

Sky Lake is also known as 6th generation Core. Include Thunderbolt 3.0, SATA Express and Iris Pro graphics with DirectX 12. It uses LGA 1151 socket for mainstream models and LGA 2066 for X-Series. Sky Lake comes with AVX2 support in all mainstreams CPUs and AVX-512 in some high end models.

Using the multithread performance as a reference, the i7-6820HQ gets a score of 206.3 k points while the i7-6700HQ gets 202.8 k points.

Summarizing, the i7-6820HQ is 1 times faster than the i7-6700HQ. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
506e3
506e3
Core
Skylake-H
Skylake-H
Architecture
Base frecuency
2.7 GHz
2.6 GHz
Boost frecuency
3.6 GHz
3.5 GHz
Socket
BGA1440
BGA1440
Cores/Threads
4/8
4/8
TDP
45 W
45 W
Cache L1 (d+i)
4x32+4x32 kB
4x32+4x32 kB
Cache L2
4x256 kB
4x256 kB
Cache L3
8192 kB
6144 kB
Date
October 2015

AVX optimized benchmark
The benchmark in mode II (AVX) is optimized to used 256 bits registers beside the first version of the Advanced Vector Extensions (AVX). The first AVX compatible CPU was released in 2011.
Monothread
i7-6820HQ
i7-6700HQ
Test#1 (Integers)
11784
11227 (-4.73%)
Test#2 (FP)
18056
16984 (-5.94%)
Test#3 (Generic, ZIP)
4479
4210 (-6.01%)
Test#1 (Memory)
7117
7072 (-0.64%)
TOTAL
41437
39493 (-4.69%)

Multithread

i7-6820HQ

i7-6700HQ
Test#1 (Integers)
49458
44588 (-9.85%)
Test#2 (FP)
84798
75024 (-11.53%)
Test#3 (Generic, ZIP)
20703
20148 (-2.68%)
Test#1 (Memory)
4770
5916 (24.02%)
TOTAL
159730
145676 (-8.80%)

AVX2 optimized benchmark
The benchmark in mode III (AVX2), like AVX1, is optimized to used 256 bits registers beside the second version of the Advanced Vector Extensions (AVX). The first AVX2 compatible CPU was released in 2013.
Monothread
i7-6820HQ
i7-6700HQ
Test#1 (Integers)
21147
21312 (0.78%)
Test#2 (FP)
18663
17866 (-4.27%)
Test#3 (Generic, ZIP)
4359
4455 (2.19%)
Test#1 (Memory)
6240
7862 (25.99%)
TOTAL
50409
51495 (2.15%)

Multithread

i7-6820HQ

i7-6700HQ
Test#1 (Integers)
91901
92690 (0.86%)
Test#2 (FP)
87330
86008 (-1.51%)
Test#3 (Generic, ZIP)
20715
20368 (-1.67%)
Test#1 (Memory)
6325
3770 (-40.40%)
TOTAL
206271
202835 (-1.67%)

Performance/W
i7-6820HQ
i7-6700HQ
Test#1 (Integers)
2042 points/W
2060 points/W
Test#2 (FP)
1941 points/W
1911 points/W
Test#3 (Generic, ZIP)
460 points/W
453 points/W
Test#1 (Memory)
141 points/W
84 points/W
TOTAL
4584 points/W
4507 points/W

Performance/GHz
i7-6820HQ
i7-6700HQ
Test#1 (Integers)
5874 points/GHz
6089 points/GHz
Test#2 (FP)
5184 points/GHz
5105 points/GHz
Test#3 (Generic, ZIP)
1211 points/GHz
1273 points/GHz
Test#1 (Memory)
1733 points/GHz
2246 points/GHz
TOTAL
14002 points/GHz
14713 points/GHz

Monothread performance graph
Monothread performance graphics gives the performance vs time. They are useful to measure the time it takes to the CPU to reach the maximum performance.

Usually, CPU's performance will be steady during these tests but if it has a slow frequency strategy, the first samples will show a lower score.


Test#1 (Integers) [points vs time]

grafica bm.hardlimit.com


Test#2 (FP) [points vs time]

grafica bm.hardlimit.com


Test#3 (Generic, ZIP) [points vs time]

grafica bm.hardlimit.com


Test#1 (Memory) [points vs time]

grafica bm.hardlimit.com

Multithread performance graph
Multithread graphs measure the performance against a heavy load during certain time.

If CPU's TDP doesn't limit the frequency and the machine is properly cooled, performance should remain steady vs time. Otherwise, the performance score will oscillate or decrease over time.


Test#1 (Integers) [points vs time]

grafica bm.hardlimit.com


Test#2 (FP) [points vs time]

grafica bm.hardlimit.com


Test#3 (Generic, ZIP) [points vs time]

grafica bm.hardlimit.com


Test#1 (Memory) [points vs time]

grafica bm.hardlimit.com

Hardlimit Benchmark Central - Ver. 3.7.8