Core i5-7400 vs i5-8250U
Description
Both models i5-7400 and i5-8250U 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 i5-8250U gets 153.5 k points.
Summarizing, the i5-7400 is 1.1 times faster than the i5-8250U. 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 i5-8250U gets 153.5 k points.
Summarizing, the i5-7400 is 1.1 times faster than the i5-8250U. 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
1.6 GHz
Boost frecuency
3.5 GHz
3.4 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
6144 kB
Date
September 2016
August 2017
Mean monothread perf.
52.69k points
53.8k points
Mean multithread perf.
173.7k points
153.5k 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
i5-8250U
Test#1 (Integers)
12.72k
12.59k (x0.99)
Test#2 (FP)
19.3k
18.89k (x0.98)
Test#3 (Generic, ZIP)
4.76k
4.65k (x0.98)
Test#1 (Memory)
8.73k
8.2k (x0.94)
TOTAL
45.52k
44.32k (x0.97)
Multithread
i5-7400
i5-8250U
Test#1 (Integers)
47.95k
45.91k (x0.96)
Test#2 (FP)
71.98k
69.55k (x0.97)
Test#3 (Generic, ZIP)
17.22k
16.79k (x0.98)
Test#1 (Memory)
8.03k
4.83k (x0.6)
TOTAL
145.18k
137.09k (x0.94)
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
i5-8250U
Test#1 (Integers)
22.37k
22k (x0.98)
Test#2 (FP)
19.46k
19.55k (x1)
Test#3 (Generic, ZIP)
4.44k
4.41k (x1)
Test#1 (Memory)
6.41k
7.83k (x1.22)
TOTAL
52.69k
53.8k (x1.02)
Multithread
i5-7400
i5-8250U
Test#1 (Integers)
79.57k
70.15k (x0.88)
Test#2 (FP)
71.41k
63.27k (x0.89)
Test#3 (Generic, ZIP)
16.44k
15.29k (x0.93)
Test#1 (Memory)
6.27k
4.8k (x0.77)
TOTAL
173.7k
153.5k (x0.88)
Performance/W
i5-7400
i5-8250U
Test#1 (Integers)
1224 points/W
4676 points/W
Test#2 (FP)
1099 points/W
4218 points/W
Test#3 (Generic, ZIP)
253 points/W
1019 points/W
Test#1 (Memory)
96 points/W
320 points/W
TOTAL
2672 points/W
10233 points/W
Performance/GHz
i5-7400
i5-8250U
Test#1 (Integers)
6392 points/GHz
6471 points/GHz
Test#2 (FP)
5561 points/GHz
5750 points/GHz
Test#3 (Generic, ZIP)
1267 points/GHz
1298 points/GHz
Test#1 (Memory)
1832 points/GHz
2304 points/GHz
TOTAL
15053 points/GHz
15823 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