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Core i5-9600KF vs i5-9400F


Description
Both models i5-9600KF and i5-9400F are based on Coffee Lake architecture.

Coffee Lake is the second refinement of Intel’s 14nm (Tri-Gate) technology. While it uses LGA1151 socket, it is incompatible with previous generations due to electrical changes in socket’s pins so these CPUs require Z370 chipset. This kind of generation introduced more cores in every range to compete with new AMD’s architecture. Coffee Lake uses DDR4 memory at 2400MHz for i3 and at 2666MHz for i5, i7 CPUs plus iGPU frequency has been increased 50MHz with respect to previous generation.

Using the multithread performance as a reference, the i5-9600KF gets a score of 371.1 k points while the i5-9400F gets 331.2 k points.

Summarizing, the i5-9600KF is 1.1 times faster than the i5-9400F. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
906ec
906ea
Core
Coffee Lake-S
Coffee Lake-S
Architecture
Base frecuency
3.7 GHz
2.9 GHz
Boost frecuency
4.6 GHz
4.1 GHz
Socket
LGA 1151
LGA 1151
Cores/Threads
6/6
6/6
TDP
95 W
65 W
Cache L1 (d+i)
6x32+6x32 kB
6x32+6x32 kB
Cache L2
6x256 kB
6x256 kB
Cache L3
9216 kB
9216 kB
Date
January 2019
January 2019
Mean monothread perf.
77.34k points
67.77k points
Mean multithread perf.
371.08k points
331.19k 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
i5-9600KF
i5-9400F
Test#1 (Integers)
30.52k
27.15k (x0.89)
Test#2 (FP)
26.54k
23.63k (x0.89)
Test#3 (Generic, ZIP)
6.41k
5.38k (x0.84)
Test#1 (Memory)
13.87k
11.61k (x0.84)
TOTAL
77.34k
67.77k (x0.88)

Multithread

i5-9600KF

i5-9400F
Test#1 (Integers)
174.66k
156.61k (x0.9)
Test#2 (FP)
154.06k
138k (x0.9)
Test#3 (Generic, ZIP)
34.11k
29.45k (x0.86)
Test#1 (Memory)
8.24k
7.14k (x0.87)
TOTAL
371.08k
331.19k (x0.89)

Performance/W
i5-9600KF
i5-9400F
Test#1 (Integers)
1839 points/W
2409 points/W
Test#2 (FP)
1622 points/W
2123 points/W
Test#3 (Generic, ZIP)
359 points/W
453 points/W
Test#1 (Memory)
87 points/W
110 points/W
TOTAL
3906 points/W
5095 points/W

Performance/GHz
i5-9600KF
i5-9400F
Test#1 (Integers)
6635 points/GHz
6622 points/GHz
Test#2 (FP)
5769 points/GHz
5763 points/GHz
Test#3 (Generic, ZIP)
1394 points/GHz
1312 points/GHz
Test#1 (Memory)
3015 points/GHz
2831 points/GHz
TOTAL
16813 points/GHz
16528 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