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Core i5-6400 vs i7-8750H


Description
The i5-6400 is based on Skylake architecture while the i7-8750H is based on Coffee Lake.

Using the multithread performance as a reference, the i5-6400 gets a score of 174.1 k points while the i7-8750H gets 231.9 k points.

Summarizing, the i7-8750H is 1.3 times faster than the i5-6400 . To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
506e3
906ea
Core
Skylake-S
Coffee Lake-H
Architecture
Base frecuency
2.7 GHz
2.2 GHz
Boost frecuency
3.3 GHz
4.1 GHz
Socket
LGA 1151
BGA1440
Cores/Threads
4/4
6/12
TDP
65 W
45 W
Cache L1 (d+i)
4x32+4x32 kB
6x32+6x32 kB
Cache L2
4x256 kB
6x256 kB
Cache L3
6144 kB
9216 kB
Date
September 2015
April 2018
Mean monothread perf.
48.05k points
53.41k points
Mean multithread perf.
174.05k points
231.9k 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
i5-6400
i7-8750H
Test#1 (Integers)
3.2k
3.01k (x0.94)
Test#2 (FP)
12.81k
11.68k (x0.91)
Test#3 (Generic, ZIP)
4.18k
3.78k (x0.9)
Test#1 (Memory)
4.3k
5.64k (x1.31)
TOTAL
24.49k
24.12k (x0.98)

Multithread

i5-6400

i7-8750H
Test#1 (Integers)
11.45k
7.4k (x0.65)
Test#2 (FP)
46.67k
29.99k (x0.64)
Test#3 (Generic, ZIP)
14.69k
9.66k (x0.66)
Test#1 (Memory)
5.92k
5.12k (x0.86)
TOTAL
78.73k
52.18k (x0.66)

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
i5-6400
i7-8750H
Test#1 (Integers)
11.82k
15.14k (x1.28)
Test#2 (FP)
18.36k
22.8k (x1.24)
Test#3 (Generic, ZIP)
4.43k
5.5k (x1.24)
Test#1 (Memory)
4.95k
10.97k (x2.22)
TOTAL
39.56k
54.41k (x1.38)

Multithread

i5-6400

i7-8750H
Test#1 (Integers)
46.04k
82.81k (x1.8)
Test#2 (FP)
69.47k
118.58k (x1.71)
Test#3 (Generic, ZIP)
16.33k
25.08k (x1.54)
Test#1 (Memory)
7.74k
4.86k (x0.63)
TOTAL
139.58k
231.34k (x1.66)

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
i5-6400
i7-8750H
Test#1 (Integers)
21.1k
22.36k (x1.06)
Test#2 (FP)
18.28k
19.33k (x1.06)
Test#3 (Generic, ZIP)
4.22k
4.4k (x1.04)
Test#1 (Memory)
4.45k
7.32k (x1.65)
TOTAL
48.05k
53.41k (x1.11)

Multithread

i5-6400

i7-8750H
Test#1 (Integers)
80.03k
103.82k (x1.3)
Test#2 (FP)
71.1k
100.47k (x1.41)
Test#3 (Generic, ZIP)
16.19k
23.81k (x1.47)
Test#1 (Memory)
6.73k
3.8k (x0.56)
TOTAL
174.05k
231.9k (x1.33)

Performance/W
i5-6400
i7-8750H
Test#1 (Integers)
1231 points/W
2307 points/W
Test#2 (FP)
1094 points/W
2233 points/W
Test#3 (Generic, ZIP)
249 points/W
529 points/W
Test#1 (Memory)
104 points/W
84 points/W
TOTAL
2678 points/W
5153 points/W

Performance/GHz
i5-6400
i7-8750H
Test#1 (Integers)
6394 points/GHz
5454 points/GHz
Test#2 (FP)
5539 points/GHz
4714 points/GHz
Test#3 (Generic, ZIP)
1279 points/GHz
1073 points/GHz
Test#1 (Memory)
1348 points/GHz
1786 points/GHz
TOTAL
14560 points/GHz
13027 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