Core i5-7400 vs i7-8550U
Description
Both models i5-7400 and i7-8550U are based on Kaby Lake architecture.
The first Kaby Lake CPU was released in August 2016. It uses a 14 nm process and was the first architecture in breaking the previous tick-tock model. Actually, it is not that different from the preceding Skylake: it has 64kB of L1 cache and 256kB L2 cache per core.
Using the multithread performance as a reference, the i5-7400 gets a score of 173.7 k points while the i7-8550U gets 166.1 k points.
Summarizing, the i5-7400 is 1 times faster than the i7-8550U. To get a proper comparison between both models, take a look to the data shown below.
The first Kaby Lake CPU was released in August 2016. It uses a 14 nm process and was the first architecture in breaking the previous tick-tock model. Actually, it is not that different from the preceding Skylake: it has 64kB of L1 cache and 256kB L2 cache per core.
Using the multithread performance as a reference, the i5-7400 gets a score of 173.7 k points while the i7-8550U gets 166.1 k points.
Summarizing, the i5-7400 is 1 times faster than the i7-8550U. To get a proper comparison between both models, take a look to the data shown below.
Specs
CPUID
906e9
806ea
Core
Kaby Lake-S
Kaby Lake-R
Base frecuency
3 GHz
1.8 GHz
Boost frecuency
3.5 GHz
4 GHz
Socket
LGA 1151
BGA1356
Cores/Threads
4/4
4/8
TDP
65 W
15 W
Cache L1 (d+i)
4x32+4x32 kB
4x32+4x32 kB
Cache L2
4x256 kB
4x256 kB
Cache L3
6144 kB
8192 kB
Date
September 2016
August 2017
Mean monothread perf.
52.69k points
64.2k points
Mean multithread perf.
173.7k points
166.12k points
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
i5-7400
i7-8550U
Test#1 (Integers)
12.72k
13.15k (x1.03)
Test#2 (FP)
19.3k
19.7k (x1.02)
Test#3 (Generic, ZIP)
4.76k
5.1k (x1.07)
Test#1 (Memory)
8.73k
9.21k (x1.06)
TOTAL
45.52k
47.16k (x1.04)
Multithread
i5-7400
i7-8550U
Test#1 (Integers)
47.95k
34.13k (x0.71)
Test#2 (FP)
71.98k
53.79k (x0.75)
Test#3 (Generic, ZIP)
17.22k
13.91k (x0.81)
Test#1 (Memory)
8.03k
4.12k (x0.51)
TOTAL
145.18k
105.95k (x0.73)
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
i5-7400
i7-8550U
Test#1 (Integers)
22.37k
25.37k (x1.13)
Test#2 (FP)
19.46k
22.6k (x1.16)
Test#3 (Generic, ZIP)
4.44k
5.13k (x1.16)
Test#1 (Memory)
6.41k
11.1k (x1.73)
TOTAL
52.69k
64.2k (x1.22)
Multithread
i5-7400
i7-8550U
Test#1 (Integers)
79.57k
72.82k (x0.92)
Test#2 (FP)
71.41k
71.71k (x1)
Test#3 (Generic, ZIP)
16.44k
17.35k (x1.06)
Test#1 (Memory)
6.27k
4.24k (x0.68)
TOTAL
173.7k
166.12k (x0.96)
Performance/W
i5-7400
i7-8550U
Test#1 (Integers)
1224 points/W
4855 points/W
Test#2 (FP)
1099 points/W
4781 points/W
Test#3 (Generic, ZIP)
253 points/W
1157 points/W
Test#1 (Memory)
96 points/W
282 points/W
TOTAL
2672 points/W
11075 points/W
Performance/GHz
i5-7400
i7-8550U
Test#1 (Integers)
6392 points/GHz
6343 points/GHz
Test#2 (FP)
5561 points/GHz
5650 points/GHz
Test#3 (Generic, ZIP)
1267 points/GHz
1282 points/GHz
Test#1 (Memory)
1832 points/GHz
2774 points/GHz
TOTAL
15053 points/GHz
16049 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