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Core i5-9600KF vs i5-6400


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

Using the multithread performance as a reference, the i5-9600KF gets a score of 371.1 k points while the i5-6400 gets 174.1 k points.

Summarizing, the i5-9600KF 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
906ec
506e3
Core
Coffee Lake-S
Skylake-S
Architecture
Base frecuency
3.7 GHz
2.7 GHz
Boost frecuency
4.6 GHz
3.3 GHz
Socket
LGA 1151
LGA 1151
Cores/Threads
6/6
4/4
TDP
95 W
65 W
Cache L1 (d+i)
6x32+6x32 kB
4x32+4x32 kB
Cache L2
6x256 kB
4x256 kB
Cache L3
9216 kB
6144 kB
Date
January 2019
September 2015
Mean monothread perf.
77.34k points
48.05k points
Mean multithread perf.
371.08k points
174.05k 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
i5-9600KF
i5-6400
Test#1 (Integers)
4.63k
3.2k (x0.69)
Test#2 (FP)
19.43k
12.81k (x0.66)
Test#3 (Generic, ZIP)
6.17k
4.18k (x0.68)
Test#1 (Memory)
13.82k
4.3k (x0.31)
TOTAL
44.04k
24.49k (x0.56)

Multithread

i5-9600KF

i5-6400
Test#1 (Integers)
26.64k
11.45k (x0.43)
Test#2 (FP)
110.11k
46.67k (x0.42)
Test#3 (Generic, ZIP)
33.07k
14.69k (x0.44)
Test#1 (Memory)
8.3k
5.92k (x0.71)
TOTAL
178.11k
78.73k (x0.44)

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
i5-9600KF
i5-6400
Test#1 (Integers)
16.5k
11.56k (x0.7)
Test#2 (FP)
24.35k
16.53k (x0.68)
Test#3 (Generic, ZIP)
6.54k
4.3k (x0.66)
Test#1 (Memory)
13.59k
3.97k (x0.29)
TOTAL
60.98k
36.36k (x0.6)

Multithread

i5-9600KF

i5-6400
Test#1 (Integers)
93.78k
43.01k (x0.46)
Test#2 (FP)
134.47k
64.46k (x0.48)
Test#3 (Generic, ZIP)
32.24k
16.14k (x0.5)
Test#1 (Memory)
8.22k
5.91k (x0.72)
TOTAL
268.71k
129.51k (x0.48)

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
i5-9600KF
i5-6400
Test#1 (Integers)
16.92k
11.82k (x0.7)
Test#2 (FP)
25.44k
18.36k (x0.72)
Test#3 (Generic, ZIP)
6.36k
4.43k (x0.7)
Test#1 (Memory)
13.25k
4.95k (x0.37)
TOTAL
61.97k
39.56k (x0.64)

Multithread

i5-9600KF

i5-6400
Test#1 (Integers)
95.51k
46.04k (x0.48)
Test#2 (FP)
143.19k
69.47k (x0.49)
Test#3 (Generic, ZIP)
33.85k
16.33k (x0.48)
Test#1 (Memory)
8.21k
7.74k (x0.94)
TOTAL
280.77k
139.58k (x0.5)

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
i5-9600KF
i5-6400
Test#1 (Integers)
30.52k
21.1k (x0.69)
Test#2 (FP)
26.54k
18.28k (x0.69)
Test#3 (Generic, ZIP)
6.41k
4.22k (x0.66)
Test#1 (Memory)
13.87k
4.45k (x0.32)
TOTAL
77.34k
48.05k (x0.62)

Multithread

i5-9600KF

i5-6400
Test#1 (Integers)
174.66k
80.03k (x0.46)
Test#2 (FP)
154.06k
71.1k (x0.46)
Test#3 (Generic, ZIP)
34.11k
16.19k (x0.47)
Test#1 (Memory)
8.24k
6.73k (x0.82)
TOTAL
371.08k
174.05k (x0.47)

Performance/W
i5-9600KF
i5-6400
Test#1 (Integers)
1839 points/W
1231 points/W
Test#2 (FP)
1622 points/W
1094 points/W
Test#3 (Generic, ZIP)
359 points/W
249 points/W
Test#1 (Memory)
87 points/W
104 points/W
TOTAL
3906 points/W
2678 points/W

Performance/GHz
i5-9600KF
i5-6400
Test#1 (Integers)
6635 points/GHz
6394 points/GHz
Test#2 (FP)
5769 points/GHz
5539 points/GHz
Test#3 (Generic, ZIP)
1394 points/GHz
1279 points/GHz
Test#1 (Memory)
3015 points/GHz
1348 points/GHz
TOTAL
16813 points/GHz
14560 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