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Core i7-6820HQ vs i7-7700HQ


Description
The i7-6820HQ is based on Skylake architecture while the i7-7700HQ is based on Kaby Lake.

Using the multithread performance as a reference, the i7-6820HQ gets a score of 206.3 k points while the i7-7700HQ gets 196.8 k points.

Summarizing, the i7-6820HQ is 1 times faster than the i7-7700HQ. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
506e3
906e9
Core
Skylake-H
Kaby Lake-H
Architecture
Base frecuency
2.7 GHz
2.8 GHz
Boost frecuency
3.6 GHz
3.8 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
January 2017

Non-optimized benchmark
The benchmark in Mode 0 (FPU) measures cpu performance with non-optimized software. It uses the basic µinstructions from the i386 architecture with the i387 floating point unit. This mode is compatible with all CPUs so it's practical to compare very different CPUs
Monothread
i7-6820HQ
i7-7700HQ
Test#1 (Integers)
3180
3822 (20.21%)
Test#2 (FP)
13020
15557 (19.49%)
Test#3 (Generic, ZIP)
4169
4934 (18.36%)
Test#1 (Memory)
6931
8277 (19.42%)
TOTAL
27299
32590 (19.38%)

Multithread

i7-6820HQ

i7-7700HQ
Test#1 (Integers)
13259
14076 (6.17%)
Test#2 (FP)
62228
65905 (5.91%)
Test#3 (Generic, ZIP)
20342
22288 (9.56%)
Test#1 (Memory)
5464
3609 (-33.94%)
TOTAL
101292
105879 (4.53%)

SSE3 optimized benchmark
The benchmark in mode I (SSE) is optimized for the use of SIMD instructions with 128 bits register and the SSE set up to version 3. Nearly every modern CPU has support for this mode.
Monothread
i7-6820HQ
i7-7700HQ
Test#1 (Integers)
11536
13789 (19.53%)
Test#2 (FP)
16687
19854 (18.98%)
Test#3 (Generic, ZIP)
4514
5171 (14.54%)
Test#1 (Memory)
7273
8418 (15.73%)
TOTAL
40011
47232 (18.05%)

Multithread

i7-6820HQ

i7-7700HQ
Test#1 (Integers)
48501
52392 (8.02%)
Test#2 (FP)
77016
86736 (12.62%)
Test#3 (Generic, ZIP)
21301
22866 (7.35%)
Test#1 (Memory)
5242
3860 (-26.37%)
TOTAL
152060
165854 (9.07%)

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
i7-7700HQ
Test#1 (Integers)
11784
12598 (6.91%)
Test#2 (FP)
18056
20142 (11.55%)
Test#3 (Generic, ZIP)
4479
4607 (2.84%)
Test#1 (Memory)
7117
5788 (-18.67%)
TOTAL
41437
43135 (4.10%)

Multithread

i7-6820HQ

i7-7700HQ
Test#1 (Integers)
49458
52641 (6.44%)
Test#2 (FP)
84798
89667 (5.74%)
Test#3 (Generic, ZIP)
20703
22538 (8.86%)
Test#1 (Memory)
4770
2968 (-37.78%)
TOTAL
159730
167814 (5.06%)

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
i7-7700HQ
Test#1 (Integers)
21147
24840 (17.47%)
Test#2 (FP)
18663
22115 (18.50%)
Test#3 (Generic, ZIP)
4359
5112 (17.25%)
Test#1 (Memory)
6240
8362 (34.00%)
TOTAL
50409
60428 (19.88%)

Multithread

i7-6820HQ

i7-7700HQ
Test#1 (Integers)
91901
89890 (-2.19%)
Test#2 (FP)
87330
82804 (-5.18%)
Test#3 (Generic, ZIP)
20715
20631 (-0.40%)
Test#1 (Memory)
6325
3459 (-45.32%)
TOTAL
206271
196783 (-4.60%)

Performance/W
i7-6820HQ
i7-7700HQ
Test#1 (Integers)
2042 points/W
1998 points/W
Test#2 (FP)
1941 points/W
1840 points/W
Test#3 (Generic, ZIP)
460 points/W
458 points/W
Test#1 (Memory)
141 points/W
77 points/W
TOTAL
4584 points/W
4373 points/W

Performance/GHz
i7-6820HQ
i7-7700HQ
Test#1 (Integers)
5874 points/GHz
6537 points/GHz
Test#2 (FP)
5184 points/GHz
5820 points/GHz
Test#3 (Generic, ZIP)
1211 points/GHz
1345 points/GHz
Test#1 (Memory)
1733 points/GHz
2200 points/GHz
TOTAL
14002 points/GHz
15902 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