Core i5-8400 vs i7-8650U
Description
The i5-8400 is based on Coffee Lake architecture while the i7-8650U is based on Kaby Lake.
Using the multithread performance as a reference, the i5-8400 gets a score of 289.6 k points while the i7-8650U gets 173.5 k points.
Summarizing, the i5-8400 is 1.7 times faster than the i7-8650U. To get a proper comparison between both models, take a look to the data shown below.
Using the multithread performance as a reference, the i5-8400 gets a score of 289.6 k points while the i7-8650U gets 173.5 k points.
Summarizing, the i5-8400 is 1.7 times faster than the i7-8650U. To get a proper comparison between both models, take a look to the data shown below.
Specs
CPUID
906ea
806ea
Core
Coffee Lake-S
Kaby Lake-R
Base frecuency
2.8 GHz
1.9 GHz
Boost frecuency
4 GHz
4.2 GHz
Socket
LGA 1151
BGA 1356
Cores/Threads
6/6
4/8
TDP
65 W
15 W
Cache L1 (d+i)
6x32+6x32 kB
4x32+4x32 kB
Cache L2
6x256 kB
4x256 kB
Cache L3
9216 kB
8192 kB
Date
September 2017
August 2017
Mean monothread perf.
64.98k points
55.86k points
Mean multithread perf.
289.61k points
173.49k 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
i5-8400
i7-8650U
Test#1 (Integers)
26.5k
21.61k (x0.82)
Test#2 (FP)
23.11k
19.69k (x0.85)
Test#3 (Generic, ZIP)
5.2k
4.61k (x0.89)
Test#1 (Memory)
10.16k
9.95k (x0.98)
TOTAL
64.98k
55.86k (x0.86)
Multithread
i5-8400
i7-8650U
Test#1 (Integers)
135.08k
78.38k (x0.58)
Test#2 (FP)
121.49k
72.02k (x0.59)
Test#3 (Generic, ZIP)
27.53k
16.95k (x0.62)
Test#1 (Memory)
5.5k
6.15k (x1.12)
TOTAL
289.61k
173.49k (x0.6)
Performance/W
i5-8400
i7-8650U
Test#1 (Integers)
2078 points/W
5225 points/W
Test#2 (FP)
1869 points/W
4802 points/W
Test#3 (Generic, ZIP)
424 points/W
1130 points/W
Test#1 (Memory)
85 points/W
410 points/W
TOTAL
4455 points/W
11566 points/W
Performance/GHz
i5-8400
i7-8650U
Test#1 (Integers)
6626 points/GHz
5146 points/GHz
Test#2 (FP)
5778 points/GHz
4689 points/GHz
Test#3 (Generic, ZIP)
1300 points/GHz
1097 points/GHz
Test#1 (Memory)
2541 points/GHz
2368 points/GHz
TOTAL
16245 points/GHz
13300 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