Core i7-7660U vs i5-8400
Description
The i7-7660U is based on Kaby Lake architecture while the i5-8400 is based on Coffee Lake.
Using the multithread performance as a reference, the i7-7660U gets a score of 132.8 k points while the i5-8400 gets 289.6 k points.
Summarizing, the i5-8400 is 2.2 times faster than the i7-7660U. To get a proper comparison between both models, take a look to the data shown below.
Using the multithread performance as a reference, the i7-7660U gets a score of 132.8 k points while the i5-8400 gets 289.6 k points.
Summarizing, the i5-8400 is 2.2 times faster than the i7-7660U. To get a proper comparison between both models, take a look to the data shown below.
Specs
CPUID
806e9
906ea
Core
Kaby Lake-U
Coffee Lake-S
Base frecuency
2.5 GHz
2.8 GHz
Boost frecuency
4 GHz
4 GHz
Socket
BGA 1356
LGA 1151
Cores/Threads
2/4
6/6
TDP
15 W
65 W
Cache L1 (d+i)
2x32+2x32 kB
6x32+6x32 kB
Cache L2
2x256 kB
6x256 kB
Cache L3
4096 kB
9216 kB
Date
January 2017
September 2017
Mean monothread perf.
57.46k points
64.98k points
Mean multithread perf.
132.81k points
289.61k 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
i7-7660U
i5-8400
Test#1 (Integers)
22.46k
26.5k (x1.18)
Test#2 (FP)
19.29k
23.11k (x1.2)
Test#3 (Generic, ZIP)
4.77k
5.2k (x1.09)
Test#1 (Memory)
10.94k
10.16k (x0.93)
TOTAL
57.46k
64.98k (x1.13)
Multithread
i7-7660U
i5-8400
Test#1 (Integers)
56.67k
135.08k (x2.38)
Test#2 (FP)
46.95k
121.49k (x2.59)
Test#3 (Generic, ZIP)
12.36k
27.53k (x2.23)
Test#1 (Memory)
16.84k
5.5k (x0.33)
TOTAL
132.81k
289.61k (x2.18)
Performance/W
i7-7660U
i5-8400
Test#1 (Integers)
3778 points/W
2078 points/W
Test#2 (FP)
3130 points/W
1869 points/W
Test#3 (Generic, ZIP)
824 points/W
424 points/W
Test#1 (Memory)
1122 points/W
85 points/W
TOTAL
8854 points/W
4455 points/W
Performance/GHz
i7-7660U
i5-8400
Test#1 (Integers)
5614 points/GHz
6626 points/GHz
Test#2 (FP)
4823 points/GHz
5778 points/GHz
Test#3 (Generic, ZIP)
1193 points/GHz
1300 points/GHz
Test#1 (Memory)
2735 points/GHz
2541 points/GHz
TOTAL
14365 points/GHz
16245 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