Core i5-8400 vs i7-6900K
Description
The i5-8400 is based on Coffee Lake architecture while the i7-6900K is based on Broadwell.
Using the multithread performance as a reference, the i5-8400 gets a score of 289.6 k points while the i7-6900K gets 427.5 k points.
Summarizing, the i7-6900K is 1.5 times faster than the i5-8400. 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 i7-6900K gets 427.5 k points.
Summarizing, the i7-6900K is 1.5 times faster than the i5-8400. To get a proper comparison between both models, take a look to the data shown below.
Specs
CPUID
906ea
406f1
Core
Coffee Lake-S
Broadwell-E
Base frecuency
2.8 GHz
3.2 GHz
Boost frecuency
4 GHz
3.7 GHz
Socket
LGA 1151
LGA 2011-3
Cores/Threads
6/6
8/16
TDP
65 W
140 W
Cache L1 (d+i)
6x32+6x32 kB
8x32+8x32 kB
Cache L2
6x256 kB
8x256 kB
Cache L3
9216 kB
20480 kB
Date
September 2017
September 2016
Mean monothread perf.
64.98k points
49.76k points
Mean multithread perf.
289.61k points
427.51k 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
i7-6900K
Test#1 (Integers)
26.5k
23.11k (x0.87)
Test#2 (FP)
23.11k
17.84k (x0.77)
Test#3 (Generic, ZIP)
5.2k
5.34k (x1.03)
Test#1 (Memory)
10.16k
3.47k (x0.34)
TOTAL
64.98k
49.76k (x0.77)
Multithread
i5-8400
i7-6900K
Test#1 (Integers)
135.08k
184.19k (x1.36)
Test#2 (FP)
121.49k
181.2k (x1.49)
Test#3 (Generic, ZIP)
27.53k
47.44k (x1.72)
Test#1 (Memory)
5.5k
14.69k (x2.67)
TOTAL
289.61k
427.51k (x1.48)
Performance/W
i5-8400
i7-6900K
Test#1 (Integers)
2078 points/W
1316 points/W
Test#2 (FP)
1869 points/W
1294 points/W
Test#3 (Generic, ZIP)
424 points/W
339 points/W
Test#1 (Memory)
85 points/W
105 points/W
TOTAL
4455 points/W
3054 points/W
Performance/GHz
i5-8400
i7-6900K
Test#1 (Integers)
6626 points/GHz
6247 points/GHz
Test#2 (FP)
5778 points/GHz
4822 points/GHz
Test#3 (Generic, ZIP)
1300 points/GHz
1444 points/GHz
Test#1 (Memory)
2541 points/GHz
938 points/GHz
TOTAL
16245 points/GHz
13450 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