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Core i7-8750H vs i7-6820HQ


Description
The i7-8750H is based on Coffee Lake architecture while the i7-6820HQ is based on Skylake.

Using the multithread performance as a reference, the i7-8750H gets a score of 231.9 k points while the i7-6820HQ gets 205.9 k points.

Summarizing, the i7-8750H is 1.1 times faster than the i7-6820HQ. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
906ea
506e3
Core
Coffee Lake-H
Skylake-H
Architecture
Base frecuency
2.2 GHz
2.7 GHz
Boost frecuency
4.1 GHz
3.6 GHz
Socket
BGA1440
BGA1440
Cores/Threads
6/12
4/8
TDP
45 W
45 W
Cache L1 (d+i)
6x32+6x32 kB
4x32+4x32 kB
Cache L2
6x256 kB
4x256 kB
Cache L3
9216 kB
8192 kB
Date
April 2018
October 2015
Mean monothread perf.
53.41k points
50.1k points
Mean multithread perf.
231.9k points
205.89k points

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
i7-8750H
i7-6820HQ
Test#1 (Integers)
3.01k
3.18k (x1.06)
Test#2 (FP)
11.68k
13.02k (x1.11)
Test#3 (Generic, ZIP)
3.78k
4.17k (x1.1)
Test#1 (Memory)
5.64k
6.93k (x1.23)
TOTAL
24.12k
27.3k (x1.13)

Multithread

i7-8750H

i7-6820HQ
Test#1 (Integers)
7.4k
13.26k (x1.79)
Test#2 (FP)
29.99k
62.23k (x2.07)
Test#3 (Generic, ZIP)
9.66k
20.34k (x2.11)
Test#1 (Memory)
5.12k
5.46k (x1.07)
TOTAL
52.18k
101.29k (x1.94)

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
i7-8750H
i7-6820HQ
Test#1 (Integers)
15.14k
11.78k (x0.78)
Test#2 (FP)
22.8k
18.06k (x0.79)
Test#3 (Generic, ZIP)
5.5k
4.48k (x0.81)
Test#1 (Memory)
10.97k
7.12k (x0.65)
TOTAL
54.41k
41.44k (x0.76)

Multithread

i7-8750H

i7-6820HQ
Test#1 (Integers)
82.81k
49.46k (x0.6)
Test#2 (FP)
118.58k
84.8k (x0.72)
Test#3 (Generic, ZIP)
25.08k
20.7k (x0.83)
Test#1 (Memory)
4.86k
4.77k (x0.98)
TOTAL
231.34k
159.73k (x0.69)

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
i7-8750H
i7-6820HQ
Test#1 (Integers)
22.36k
20.99k (x0.94)
Test#2 (FP)
19.33k
18.63k (x0.96)
Test#3 (Generic, ZIP)
4.4k
4.33k (x0.99)
Test#1 (Memory)
7.32k
6.15k (x0.84)
TOTAL
53.41k
50.1k (x0.94)

Multithread

i7-8750H

i7-6820HQ
Test#1 (Integers)
103.82k
91.8k (x0.88)
Test#2 (FP)
100.47k
87.24k (x0.87)
Test#3 (Generic, ZIP)
23.81k
20.55k (x0.86)
Test#1 (Memory)
3.8k
6.3k (x1.66)
TOTAL
231.9k
205.89k (x0.89)

Performance/W
i7-8750H
i7-6820HQ
Test#1 (Integers)
2307 points/W
2040 points/W
Test#2 (FP)
2233 points/W
1939 points/W
Test#3 (Generic, ZIP)
529 points/W
457 points/W
Test#1 (Memory)
84 points/W
140 points/W
TOTAL
5153 points/W
4575 points/W

Performance/GHz
i7-8750H
i7-6820HQ
Test#1 (Integers)
5454 points/GHz
5831 points/GHz
Test#2 (FP)
4714 points/GHz
5174 points/GHz
Test#3 (Generic, ZIP)
1073 points/GHz
1204 points/GHz
Test#1 (Memory)
1786 points/GHz
1708 points/GHz
TOTAL
13027 points/GHz
13917 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