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Core i5-6400 vs i5-9600K


Description
The i5-6400 is based on Skylake architecture while the i5-9600K is based on Coffee Lake.

Using the multithread performance as a reference, the i5-6400 gets a score of 174.1 k points while the i5-9600K gets 372.7 k points.

Summarizing, the i5-9600K is 2.1 times faster than the i5-6400 . To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
506e3
906ed
Core
Skylake-S
Coffee Lake-S
Architecture
Base frecuency
2.7 GHz
3.7 GHz
Boost frecuency
3.3 GHz
4.6 GHz
Socket
LGA 1151
LGA 1151
Cores/Threads
4/4
6/6
TDP
65 W
95 W
Cache L1 (d+i)
4x32+4x32 kB
6x32+6x32 kB
Cache L2
4x256 kB
6x256 kB
Cache L3
6144 kB
9216 kB
Date
September 2015
October 2018
Mean monothread perf.
48.05k points
77.75k points
Mean multithread perf.
174.05k points
372.74k 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
i5-6400
i5-9600K
Test#1 (Integers)
3.2k
4.69k (x1.47)
Test#2 (FP)
12.81k
19.35k (x1.51)
Test#3 (Generic, ZIP)
4.18k
6.08k (x1.46)
Test#1 (Memory)
4.3k
13.81k (x3.21)
TOTAL
24.49k
43.93k (x1.79)

Multithread

i5-6400

i5-9600K
Test#1 (Integers)
11.45k
26.24k (x2.29)
Test#2 (FP)
46.67k
107.95k (x2.31)
Test#3 (Generic, ZIP)
14.69k
34.5k (x2.35)
Test#1 (Memory)
5.92k
8.1k (x1.37)
TOTAL
78.73k
176.79k (x2.25)

SSE3 optimized benchmark
The benchmark in mode I (SSE) is optimized for the use of SIMD instructions with 128 bits register and the SSE set up to version 3. Nearly every modern CPU has support for this mode.
Monothread
i5-6400
i5-9600K
Test#1 (Integers)
11.56k
16.91k (x1.46)
Test#2 (FP)
16.53k
24.42k (x1.48)
Test#3 (Generic, ZIP)
4.3k
6.37k (x1.48)
Test#1 (Memory)
3.97k
13.55k (x3.41)
TOTAL
36.36k
61.25k (x1.68)

Multithread

i5-6400

i5-9600K
Test#1 (Integers)
43.01k
95.21k (x2.21)
Test#2 (FP)
64.46k
137.3k (x2.13)
Test#3 (Generic, ZIP)
16.14k
36.05k (x2.23)
Test#1 (Memory)
5.91k
8.4k (x1.42)
TOTAL
129.51k
276.96k (x2.14)

AVX optimized benchmark
The benchmark in mode II (AVX) is optimized to used 256 bits registers beside the first version of the Advanced Vector Extensions (AVX). The first AVX compatible CPU was released in 2011.
Monothread
i5-6400
i5-9600K
Test#1 (Integers)
11.82k
16.75k (x1.42)
Test#2 (FP)
18.36k
25.5k (x1.39)
Test#3 (Generic, ZIP)
4.43k
6.17k (x1.39)
Test#1 (Memory)
4.95k
13.06k (x2.64)
TOTAL
39.56k
61.48k (x1.55)

Multithread

i5-6400

i5-9600K
Test#1 (Integers)
46.04k
96.03k (x2.09)
Test#2 (FP)
69.47k
143.78k (x2.07)
Test#3 (Generic, ZIP)
16.33k
35.06k (x2.15)
Test#1 (Memory)
7.74k
8.45k (x1.09)
TOTAL
139.58k
283.33k (x2.03)

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
i5-6400
i5-9600K
Test#1 (Integers)
21.1k
30.64k (x1.45)
Test#2 (FP)
18.28k
26.75k (x1.46)
Test#3 (Generic, ZIP)
4.22k
6.33k (x1.5)
Test#1 (Memory)
4.45k
14.03k (x3.15)
TOTAL
48.05k
77.75k (x1.62)

Multithread

i5-6400

i5-9600K
Test#1 (Integers)
80.03k
174.92k (x2.19)
Test#2 (FP)
71.1k
153.88k (x2.16)
Test#3 (Generic, ZIP)
16.19k
35.93k (x2.22)
Test#1 (Memory)
6.73k
8k (x1.19)
TOTAL
174.05k
372.74k (x2.14)

Performance/W
i5-6400
i5-9600K
Test#1 (Integers)
1231 points/W
1841 points/W
Test#2 (FP)
1094 points/W
1620 points/W
Test#3 (Generic, ZIP)
249 points/W
378 points/W
Test#1 (Memory)
104 points/W
84 points/W
TOTAL
2678 points/W
3924 points/W

Performance/GHz
i5-6400
i5-9600K
Test#1 (Integers)
6394 points/GHz
6661 points/GHz
Test#2 (FP)
5539 points/GHz
5815 points/GHz
Test#3 (Generic, ZIP)
1279 points/GHz
1376 points/GHz
Test#1 (Memory)
1348 points/GHz
3049 points/GHz
TOTAL
14560 points/GHz
16902 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.


Test#1 (Integers) [points vs time]

grafica bm.hardlimit.com


Test#2 (FP) [points vs time]

grafica bm.hardlimit.com


Test#3 (Generic, ZIP) [points vs time]

grafica bm.hardlimit.com


Test#1 (Memory) [points vs time]

grafica bm.hardlimit.com

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.


Test#1 (Integers) [points vs time]

grafica bm.hardlimit.com


Test#2 (FP) [points vs time]

grafica bm.hardlimit.com


Test#3 (Generic, ZIP) [points vs time]

grafica bm.hardlimit.com


Test#1 (Memory) [points vs time]

grafica bm.hardlimit.com

Hardlimit Benchmark Central - Ver. 3.11.4