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Core i5-8265U vs i5-7400


Description
The i5-8265U is based on Whiskey Lake architecture while the i5-7400 is based on Kaby Lake.

Using the multithread performance as a reference, the i5-8265U gets a score of 143.2 k points while the i5-7400 gets 173.7 k points.

Summarizing, the i5-7400 is 1.2 times faster than the i5-8265U. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
806ec
906e9
Core
Whiskey Lake-U
Kaby Lake-S
Architecture
Base frecuency
1.6 GHz
3 GHz
Boost frecuency
3.9 GHz
3.5 GHz
Socket
BGA1528
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 2018
September 2016
Mean monothread perf.
46.67k points
52.69k points
Mean multithread perf.
143.23k 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
i5-8265U
i5-7400
Test#1 (Integers)
13.66k
12.72k (x0.93)
Test#2 (FP)
21.17k
19.3k (x0.91)
Test#3 (Generic, ZIP)
5k
4.76k (x0.95)
Test#1 (Memory)
8.11k
8.73k (x1.08)
TOTAL
47.94k
45.52k (x0.95)

Multithread

i5-8265U

i5-7400
Test#1 (Integers)
51.36k
47.95k (x0.93)
Test#2 (FP)
79.72k
71.98k (x0.9)
Test#3 (Generic, ZIP)
16.61k
17.22k (x1.04)
Test#1 (Memory)
3.75k
8.03k (x2.14)
TOTAL
151.44k
145.18k (x0.96)

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
i5-8265U
i5-7400
Test#1 (Integers)
19.19k
22.37k (x1.17)
Test#2 (FP)
17.47k
19.46k (x1.11)
Test#3 (Generic, ZIP)
4.04k
4.44k (x1.1)
Test#1 (Memory)
5.97k
6.41k (x1.07)
TOTAL
46.67k
52.69k (x1.13)

Multithread

i5-8265U

i5-7400
Test#1 (Integers)
64.43k
79.57k (x1.23)
Test#2 (FP)
61.91k
71.41k (x1.15)
Test#3 (Generic, ZIP)
13.36k
16.44k (x1.23)
Test#1 (Memory)
3.52k
6.27k (x1.78)
TOTAL
143.23k
173.7k (x1.21)

Performance/W
i5-8265U
i5-7400
Test#1 (Integers)
4296 points/W
1224 points/W
Test#2 (FP)
4128 points/W
1099 points/W
Test#3 (Generic, ZIP)
890 points/W
253 points/W
Test#1 (Memory)
235 points/W
96 points/W
TOTAL
9548 points/W
2672 points/W

Performance/GHz
i5-8265U
i5-7400
Test#1 (Integers)
4920 points/GHz
6392 points/GHz
Test#2 (FP)
4478 points/GHz
5561 points/GHz
Test#3 (Generic, ZIP)
1037 points/GHz
1267 points/GHz
Test#1 (Memory)
1531 points/GHz
1832 points/GHz
TOTAL
11966 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.


Test#1 (Integers) [points vs time]

grafica bm.hardlimit.com


Test#2 (FP) [points vs time]

grafica bm.hardlimit.com


Test#3 (Generic, ZIP) [points vs time]

grafica bm.hardlimit.com


Test#1 (Memory) [points vs time]

grafica bm.hardlimit.com

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.


Test#1 (Integers) [points vs time]

grafica bm.hardlimit.com


Test#2 (FP) [points vs time]

grafica bm.hardlimit.com


Test#3 (Generic, ZIP) [points vs time]

grafica bm.hardlimit.com


Test#1 (Memory) [points vs time]

grafica bm.hardlimit.com

Hardlimit Benchmark Central - Ver. 3.11.4