Core i5-8250U vs i5-7400
Description
Both models i5-8250U and i5-7400 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 i5-8250U gets a score of 153.5 k points while the i5-7400 gets 173.7 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 i5-8250U gets a score of 153.5 k points while the i5-7400 gets 173.7 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
806ea
906e9
Core
Kaby Lake-R
Kaby Lake-S
Base frecuency
1.6 GHz
3 GHz
Boost frecuency
3.4 GHz
3.5 GHz
Socket
BGA1356
LGA 1151
Cores/Threads
4/8
4/4
TDP
15 W
65 W
Cache L1 (d+i)
4x32+4x32 kB
4x32+4x32 kB
Cache L2
4x256 kB
4x256 kB
Cache L3
6144 kB
6144 kB
Date
August 2017
September 2016
Mean monothread perf.
53.8k points
52.69k points
Mean multithread perf.
153.5k points
173.7k 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
i5-8250U
i5-7400
Test#1 (Integers)
12.59k
12.72k (x1.01)
Test#2 (FP)
18.89k
19.3k (x1.02)
Test#3 (Generic, ZIP)
4.65k
4.76k (x1.02)
Test#1 (Memory)
8.2k
8.73k (x1.07)
TOTAL
44.32k
45.52k (x1.03)
Multithread
i5-8250U
i5-7400
Test#1 (Integers)
45.91k
47.95k (x1.04)
Test#2 (FP)
69.55k
71.98k (x1.03)
Test#3 (Generic, ZIP)
16.79k
17.22k (x1.03)
Test#1 (Memory)
4.83k
8.03k (x1.66)
TOTAL
137.09k
145.18k (x1.06)
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
i5-8250U
i5-7400
Test#1 (Integers)
22k
22.37k (x1.02)
Test#2 (FP)
19.55k
19.46k (x1)
Test#3 (Generic, ZIP)
4.41k
4.44k (x1)
Test#1 (Memory)
7.83k
6.41k (x0.82)
TOTAL
53.8k
52.69k (x0.98)
Multithread
i5-8250U
i5-7400
Test#1 (Integers)
70.15k
79.57k (x1.13)
Test#2 (FP)
63.27k
71.41k (x1.13)
Test#3 (Generic, ZIP)
15.29k
16.44k (x1.08)
Test#1 (Memory)
4.8k
6.27k (x1.31)
TOTAL
153.5k
173.7k (x1.13)
Performance/W
i5-8250U
i5-7400
Test#1 (Integers)
4676 points/W
1224 points/W
Test#2 (FP)
4218 points/W
1099 points/W
Test#3 (Generic, ZIP)
1019 points/W
253 points/W
Test#1 (Memory)
320 points/W
96 points/W
TOTAL
10233 points/W
2672 points/W
Performance/GHz
i5-8250U
i5-7400
Test#1 (Integers)
6471 points/GHz
6392 points/GHz
Test#2 (FP)
5750 points/GHz
5561 points/GHz
Test#3 (Generic, ZIP)
1298 points/GHz
1267 points/GHz
Test#1 (Memory)
2304 points/GHz
1832 points/GHz
TOTAL
15823 points/GHz
15053 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