Core i7-8665U vs i5-6400
Description
The i7-8665U is based on Whiskey Lake architecture while the i5-6400 is based on Skylake.
Using the multithread performance as a reference, the i7-8665U gets a score of 109.7 k points while the i5-6400 gets 174.1 k points.
Summarizing, the i5-6400 is 1.6 times faster than the i7-8665U. To get a proper comparison between both models, take a look to the data shown below.
Using the multithread performance as a reference, the i7-8665U gets a score of 109.7 k points while the i5-6400 gets 174.1 k points.
Summarizing, the i5-6400 is 1.6 times faster than the i7-8665U. To get a proper comparison between both models, take a look to the data shown below.
Specs
CPUID
806ec
506e3
Core
Whiskey Lake-U
Skylake-S
Base frecuency
1.9 GHz
2.7 GHz
Boost frecuency
4.8 GHz
3.3 GHz
Socket
BGA 1528
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
8192 kB
6144 kB
Date
April 2019
September 2015
Mean monothread perf.
35.19k points
48.05k points
Mean multithread perf.
109.72k points
174.05k points
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
i7-8665U
i5-6400
Test#1 (Integers)
14.38k
21.1k (x1.47)
Test#2 (FP)
13.43k
18.28k (x1.36)
Test#3 (Generic, ZIP)
2.87k
4.22k (x1.47)
Test#1 (Memory)
4.49k
4.45k (x0.99)
TOTAL
35.19k
48.05k (x1.37)
Multithread
i7-8665U
i5-6400
Test#1 (Integers)
47.22k
80.03k (x1.69)
Test#2 (FP)
46.99k
71.1k (x1.51)
Test#3 (Generic, ZIP)
10.08k
16.19k (x1.61)
Test#1 (Memory)
5.42k
6.73k (x1.24)
TOTAL
109.72k
174.05k (x1.59)
Performance/W
i7-8665U
i5-6400
Test#1 (Integers)
3148 points/W
1231 points/W
Test#2 (FP)
3133 points/W
1094 points/W
Test#3 (Generic, ZIP)
672 points/W
249 points/W
Test#1 (Memory)
361 points/W
104 points/W
TOTAL
7314 points/W
2678 points/W
Performance/GHz
i7-8665U
i5-6400
Test#1 (Integers)
2996 points/GHz
6394 points/GHz
Test#2 (FP)
2799 points/GHz
5539 points/GHz
Test#3 (Generic, ZIP)
599 points/GHz
1279 points/GHz
Test#1 (Memory)
936 points/GHz
1348 points/GHz
TOTAL
7330 points/GHz
14560 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