Core i7-9750H vs i5-8400
Description
Both models i7-9750H and i5-8400 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 i7-9750H gets a score of 276.5 k points while the i5-8400 gets 289.6 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.
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 i7-9750H gets a score of 276.5 k points while the i5-8400 gets 289.6 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
906ed
906ea
Core
Coffee Lake-H
Coffee Lake-S
Base frecuency
2.6 GHz
2.8 GHz
Boost frecuency
4.5 GHz
4 GHz
Socket
BGA 1440
LGA 1151
Cores/Threads
6/12
6/6
TDP
45 W
65 W
Cache L1 (d+i)
6x32+6x32 kB
6x32+6x32 kB
Cache L2
6x256 kB
6x256 kB
Cache L3
12288 kB
9216 kB
Date
April 2019
September 2017
Mean monothread perf.
62.92k points
64.98k points
Mean multithread perf.
276.46k points
289.61k 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
i7-9750H
i5-8400
Test#1 (Integers)
4.53k
4.08k (x0.9)
Test#2 (FP)
18.24k
14.96k (x0.82)
Test#3 (Generic, ZIP)
5.76k
4.98k (x0.86)
Test#1 (Memory)
13.01k
10.29k (x0.79)
TOTAL
41.54k
34.31k (x0.83)
Multithread
i7-9750H
i5-8400
Test#1 (Integers)
24.3k
21.54k (x0.89)
Test#2 (FP)
97.88k
85.13k (x0.87)
Test#3 (Generic, ZIP)
29.85k
28.24k (x0.95)
Test#1 (Memory)
11.93k
4.08k (x0.34)
TOTAL
163.95k
139k (x0.85)
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
i7-9750H
i5-8400
Test#1 (Integers)
25.22k
26.5k (x1.05)
Test#2 (FP)
21.97k
23.11k (x1.05)
Test#3 (Generic, ZIP)
5.02k
5.2k (x1.04)
Test#1 (Memory)
10.71k
10.16k (x0.95)
TOTAL
62.92k
64.98k (x1.03)
Multithread
i7-9750H
i5-8400
Test#1 (Integers)
125.56k
135.08k (x1.08)
Test#2 (FP)
115.86k
121.49k (x1.05)
Test#3 (Generic, ZIP)
25.63k
27.53k (x1.07)
Test#1 (Memory)
9.4k
5.5k (x0.59)
TOTAL
276.46k
289.61k (x1.05)
Performance/W
i7-9750H
i5-8400
Test#1 (Integers)
2790 points/W
2078 points/W
Test#2 (FP)
2575 points/W
1869 points/W
Test#3 (Generic, ZIP)
570 points/W
424 points/W
Test#1 (Memory)
209 points/W
85 points/W
TOTAL
6144 points/W
4455 points/W
Performance/GHz
i7-9750H
i5-8400
Test#1 (Integers)
5605 points/GHz
6626 points/GHz
Test#2 (FP)
4882 points/GHz
5778 points/GHz
Test#3 (Generic, ZIP)
1115 points/GHz
1300 points/GHz
Test#1 (Memory)
2380 points/GHz
2541 points/GHz
TOTAL
13982 points/GHz
16245 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.
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]
Test#2 (FP) [points vs time]
Test#3 (Generic, ZIP) [points vs time]
Test#1 (Memory) [points vs time]
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.
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]
Test#2 (FP) [points vs time]
Test#3 (Generic, ZIP) [points vs time]
Test#1 (Memory) [points vs time]
Hardlimit Benchmark Central - Ver. 3.11.4