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Core i5-8400 vs i7-9750H


Description
Both models i5-8400 and i7-9750H are based on Coffee Lake architecture.

Coffee Lake is the second refinement of Intel’s 14nm (Tri-Gate) technology. While it uses LGA1151 socket, it is incompatible with previous generations due to electrical changes in socket’s pins so these CPUs require Z370 chipset. This kind of generation introduced more cores in every range to compete with new AMD’s architecture. Coffee Lake uses DDR4 memory at 2400MHz for i3 and at 2666MHz for i5, i7 CPUs plus iGPU frequency has been increased 50MHz with respect to previous generation.

Using the multithread performance as a reference, the i5-8400 gets a score of 289.6 k points while the i7-9750H gets 286.4 k points.

Summarizing, the i5-8400 is 1 times faster than the i7-9750H. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
906ea
906ea
Core
Coffee Lake-S
Coffee Lake-H
Architecture
Base frecuency
2.8 GHz
2.6 GHz
Boost frecuency
4 GHz
4.5 GHz
Socket
LGA 1151
BGA 1440
Cores/Threads
6/6
6/12
TDP
65 W
45 W
Cache L1 (d+i)
6x32+6x32 kB
6x32+6x32 kB
Cache L2
6x256 kB
6x256 kB
Cache L3
9216 kB
12288 kB
Date
September 2017
April 2019
Mean monothread perf.
64.98k points
65.33k points
Mean multithread perf.
289.61k points
286.43k points

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
i5-8400
i7-9750H
Test#1 (Integers)
26.5k
25.93k (x0.98)
Test#2 (FP)
23.11k
22.84k (x0.99)
Test#3 (Generic, ZIP)
5.2k
5.11k (x0.98)
Test#1 (Memory)
10.16k
11.46k (x1.13)
TOTAL
64.98k
65.33k (x1.01)

Multithread

i5-8400

i7-9750H
Test#1 (Integers)
135.08k
130.68k (x0.97)
Test#2 (FP)
121.49k
119.91k (x0.99)
Test#3 (Generic, ZIP)
27.53k
28.76k (x1.04)
Test#1 (Memory)
5.5k
7.08k (x1.29)
TOTAL
289.61k
286.43k (x0.99)

Performance/W
i5-8400
i7-9750H
Test#1 (Integers)
2078 points/W
2904 points/W
Test#2 (FP)
1869 points/W
2665 points/W
Test#3 (Generic, ZIP)
424 points/W
639 points/W
Test#1 (Memory)
85 points/W
157 points/W
TOTAL
4455 points/W
6365 points/W

Performance/GHz
i5-8400
i7-9750H
Test#1 (Integers)
6626 points/GHz
5762 points/GHz
Test#2 (FP)
5778 points/GHz
5075 points/GHz
Test#3 (Generic, ZIP)
1300 points/GHz
1135 points/GHz
Test#1 (Memory)
2541 points/GHz
2547 points/GHz
TOTAL
16245 points/GHz
14519 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