Core i7-6700K vs i5-8400
Description
The i7-6700K is based on Skylake architecture while the i5-8400 is based on Coffee Lake.
Using the multithread performance as a reference, the i7-6700K gets a score of 254.6 k points while the i5-8400 gets 289.6 k points.
Summarizing, the i5-8400 is 1.1 times faster than the i7-6700K . To get a proper comparison between both models, take a look to the data shown below.
Using the multithread performance as a reference, the i7-6700K gets a score of 254.6 k points while the i5-8400 gets 289.6 k points.
Summarizing, the i5-8400 is 1.1 times faster than the i7-6700K . To get a proper comparison between both models, take a look to the data shown below.
Specs
CPUID
506e3
906ea
Core
Skylake-S
Coffee Lake-S
Base frecuency
4 GHz
2.8 GHz
Boost frecuency
4.2 GHz
4 GHz
Socket
LGA 1151
LGA 1151
Cores/Threads
4/8
6/6
TDP
95 W
65 W
Cache L1 (d+i)
4x32+4x32 kB
6x32+6x32 kB
Cache L2
256 kB
6x256 kB
Cache L3
8192 kB
9216 kB
Date
May 2015
September 2017
Mean monothread perf.
63.22k points
64.98k points
Mean multithread perf.
254.56k points
289.61k points
Non-optimized benchmark
The benchmark in Mode 0 (FPU) measures cpu performance with non-optimized software. It uses the basic µinstructions from the i386 architecture with the i387 floating point unit. This mode is compatible with all CPUs so it's practical to compare very different CPUs
Monothread
i7-6700K
i5-8400
Test#1 (Integers)
4.07k
4.08k (x1)
Test#2 (FP)
16.62k
14.96k (x0.9)
Test#3 (Generic, ZIP)
5.23k
4.98k (x0.95)
Test#1 (Memory)
6.28k
10.29k (x1.64)
TOTAL
32.2k
34.31k (x1.07)
Multithread
i7-6700K
i5-8400
Test#1 (Integers)
16.37k
21.54k (x1.32)
Test#2 (FP)
77.34k
85.13k (x1.1)
Test#3 (Generic, ZIP)
25.65k
28.24k (x1.1)
Test#1 (Memory)
10.21k
4.08k (x0.4)
TOTAL
129.57k
139k (x1.07)
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
i7-6700K
i5-8400
Test#1 (Integers)
25.78k
26.5k (x1.03)
Test#2 (FP)
23.08k
23.11k (x1)
Test#3 (Generic, ZIP)
5.32k
5.2k (x0.98)
Test#1 (Memory)
9.03k
10.16k (x1.13)
TOTAL
63.22k
64.98k (x1.03)
Multithread
i7-6700K
i5-8400
Test#1 (Integers)
112.83k
135.08k (x1.2)
Test#2 (FP)
106.86k
121.49k (x1.14)
Test#3 (Generic, ZIP)
25.76k
27.53k (x1.07)
Test#1 (Memory)
9.12k
5.5k (x0.6)
TOTAL
254.56k
289.61k (x1.14)
Performance/W
i7-6700K
i5-8400
Test#1 (Integers)
1188 points/W
2078 points/W
Test#2 (FP)
1125 points/W
1869 points/W
Test#3 (Generic, ZIP)
271 points/W
424 points/W
Test#1 (Memory)
96 points/W
85 points/W
TOTAL
2680 points/W
4455 points/W
Performance/GHz
i7-6700K
i5-8400
Test#1 (Integers)
6139 points/GHz
6626 points/GHz
Test#2 (FP)
5495 points/GHz
5778 points/GHz
Test#3 (Generic, ZIP)
1268 points/GHz
1300 points/GHz
Test#1 (Memory)
2150 points/GHz
2541 points/GHz
TOTAL
15052 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