Core i7-8550U vs i5-8400
Description
The i7-8550U is based on Kaby Lake architecture while the i5-8400 is based on Coffee Lake.
Using the multithread performance as a reference, the i7-8550U gets a score of 166.1 k points while the i5-8400 gets 289.6 k points.
Summarizing, the i5-8400 is 1.7 times faster than the i7-8550U. To get a proper comparison between both models, take a look to the data shown below.
Using the multithread performance as a reference, the i7-8550U gets a score of 166.1 k points while the i5-8400 gets 289.6 k points.
Summarizing, the i5-8400 is 1.7 times faster than the i7-8550U. To get a proper comparison between both models, take a look to the data shown below.
Specs
CPUID
806ea
906ea
Core
Kaby Lake-R
Coffee Lake-S
Base frecuency
1.8 GHz
2.8 GHz
Boost frecuency
4 GHz
4 GHz
Socket
BGA1356
LGA 1151
Cores/Threads
4/8
6/6
TDP
15 W
65 W
Cache L1 (d+i)
4x32+4x32 kB
6x32+6x32 kB
Cache L2
4x256 kB
6x256 kB
Cache L3
8192 kB
9216 kB
Date
August 2017
September 2017
Mean monothread perf.
64.2k points
64.98k points
Mean multithread perf.
166.12k 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
i7-8550U
i5-8400
Test#1 (Integers)
3.91k
4.08k (x1.04)
Test#2 (FP)
15.98k
14.96k (x0.94)
Test#3 (Generic, ZIP)
5.11k
4.98k (x0.97)
Test#1 (Memory)
11.05k
10.29k (x0.93)
TOTAL
36.05k
34.31k (x0.95)
Multithread
i7-8550U
i5-8400
Test#1 (Integers)
11.76k
21.54k (x1.83)
Test#2 (FP)
50.15k
85.13k (x1.7)
Test#3 (Generic, ZIP)
16.76k
28.24k (x1.69)
Test#1 (Memory)
4.17k
4.08k (x0.98)
TOTAL
82.84k
139k (x1.68)
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
i7-8550U
i5-8400
Test#1 (Integers)
25.37k
26.5k (x1.04)
Test#2 (FP)
22.6k
23.11k (x1.02)
Test#3 (Generic, ZIP)
5.13k
5.2k (x1.01)
Test#1 (Memory)
11.1k
10.16k (x0.92)
TOTAL
64.2k
64.98k (x1.01)
Multithread
i7-8550U
i5-8400
Test#1 (Integers)
72.82k
135.08k (x1.85)
Test#2 (FP)
71.71k
121.49k (x1.69)
Test#3 (Generic, ZIP)
17.35k
27.53k (x1.59)
Test#1 (Memory)
4.24k
5.5k (x1.3)
TOTAL
166.12k
289.61k (x1.74)
Performance/W
i7-8550U
i5-8400
Test#1 (Integers)
4855 points/W
2078 points/W
Test#2 (FP)
4781 points/W
1869 points/W
Test#3 (Generic, ZIP)
1157 points/W
424 points/W
Test#1 (Memory)
282 points/W
85 points/W
TOTAL
11075 points/W
4455 points/W
Performance/GHz
i7-8550U
i5-8400
Test#1 (Integers)
6343 points/GHz
6626 points/GHz
Test#2 (FP)
5650 points/GHz
5778 points/GHz
Test#3 (Generic, ZIP)
1282 points/GHz
1300 points/GHz
Test#1 (Memory)
2774 points/GHz
2541 points/GHz
TOTAL
16049 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