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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 205.9 k points while the i7-6700HQ gets 205.2 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
Mean monothread perf.
50.1k points
50.54k points
Mean multithread perf.
205.89k points
205.24k points

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)
11.78k
11.23k (x0.95)
Test#2 (FP)
18.06k
16.98k (x0.94)
Test#3 (Generic, ZIP)
4.48k
4.21k (x0.94)
Test#1 (Memory)
7.12k
7.07k (x0.99)
TOTAL
41.44k
39.49k (x0.95)

Multithread

i7-6820HQ

i7-6700HQ
Test#1 (Integers)
49.46k
44.59k (x0.9)
Test#2 (FP)
84.8k
75.02k (x0.88)
Test#3 (Generic, ZIP)
20.7k
20.15k (x0.97)
Test#1 (Memory)
4.77k
5.92k (x1.24)
TOTAL
159.73k
145.68k (x0.91)

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)
20.99k
21.33k (x1.02)
Test#2 (FP)
18.63k
18.34k (x0.98)
Test#3 (Generic, ZIP)
4.33k
4.44k (x1.02)
Test#1 (Memory)
6.15k
6.44k (x1.05)
TOTAL
50.1k
50.54k (x1.01)

Multithread

i7-6820HQ

i7-6700HQ
Test#1 (Integers)
91.8k
91.89k (x1)
Test#2 (FP)
87.24k
87.87k (x1.01)
Test#3 (Generic, ZIP)
20.55k
20.61k (x1)
Test#1 (Memory)
6.3k
4.87k (x0.77)
TOTAL
205.89k
205.24k (x1)

Performance/W
i7-6820HQ
i7-6700HQ
Test#1 (Integers)
2040 points/W
2042 points/W
Test#2 (FP)
1939 points/W
1953 points/W
Test#3 (Generic, ZIP)
457 points/W
458 points/W
Test#1 (Memory)
140 points/W
108 points/W
TOTAL
4575 points/W
4561 points/W

Performance/GHz
i7-6820HQ
i7-6700HQ
Test#1 (Integers)
5831 points/GHz
6094 points/GHz
Test#2 (FP)
5174 points/GHz
5240 points/GHz
Test#3 (Generic, ZIP)
1204 points/GHz
1267 points/GHz
Test#1 (Memory)
1708 points/GHz
1840 points/GHz
TOTAL
13917 points/GHz
14441 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. 3.11.4