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Core i5-9600KF vs i9-9900K


Description
Both models i5-9600KF and i9-9900K 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 i9-9900K gets 529.3 k points.

Summarizing, the i9-9900K is 1.4 times faster than the i5-9600KF. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
906ec
906ed
Core
Coffee Lake-S
Coffee Lake-S
Architecture
Base frecuency
3.7 GHz
3.6 GHz
Boost frecuency
4.6 GHz
5 GHz
Socket
LGA 1151
LGA 1151
Cores/Threads
6/6
8/16
TDP
95 W
95 W
Cache L1 (d+i)
6x32+6x32 kB
8x32+8x32 kB
Cache L2
6x256 kB
8x256 kB
Cache L3
9216 kB
16384 kB
Date
January 2019
October 2018
Mean monothread perf.
77.34k points
81.91k points
Mean multithread perf.
371.08k points
529.32k 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
i9-9900K
Test#1 (Integers)
4.63k
5k (x1.08)
Test#2 (FP)
19.43k
20.22k (x1.04)
Test#3 (Generic, ZIP)
6.17k
6.54k (x1.06)
Test#1 (Memory)
13.82k
13.78k (x1)
TOTAL
44.04k
45.53k (x1.03)

Multithread

i5-9600KF

i9-9900K
Test#1 (Integers)
26.64k
36.39k (x1.37)
Test#2 (FP)
110.11k
166.55k (x1.51)
Test#3 (Generic, ZIP)
33.07k
54.92k (x1.66)
Test#1 (Memory)
8.3k
8.96k (x1.08)
TOTAL
178.11k
266.82k (x1.5)

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
i9-9900K
Test#1 (Integers)
16.5k
18.03k (x1.09)
Test#2 (FP)
24.35k
25.98k (x1.07)
Test#3 (Generic, ZIP)
6.54k
6.86k (x1.05)
Test#1 (Memory)
13.59k
14.5k (x1.07)
TOTAL
60.98k
65.37k (x1.07)

Multithread

i5-9600KF

i9-9900K
Test#1 (Integers)
93.78k
131.34k (x1.4)
Test#2 (FP)
134.47k
204.76k (x1.52)
Test#3 (Generic, ZIP)
32.24k
55.74k (x1.73)
Test#1 (Memory)
8.22k
8.99k (x1.09)
TOTAL
268.71k
400.83k (x1.49)

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
i9-9900K
Test#1 (Integers)
16.92k
17.98k (x1.06)
Test#2 (FP)
25.44k
27.04k (x1.06)
Test#3 (Generic, ZIP)
6.36k
6.63k (x1.04)
Test#1 (Memory)
13.25k
13.6k (x1.03)
TOTAL
61.97k
65.24k (x1.05)

Multithread

i5-9600KF

i9-9900K
Test#1 (Integers)
95.51k
130.88k (x1.37)
Test#2 (FP)
143.19k
208.5k (x1.46)
Test#3 (Generic, ZIP)
33.85k
54.12k (x1.6)
Test#1 (Memory)
8.21k
8.91k (x1.08)
TOTAL
280.77k
402.41k (x1.43)

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
i9-9900K
Test#1 (Integers)
30.52k
32.08k (x1.05)
Test#2 (FP)
26.54k
28.17k (x1.06)
Test#3 (Generic, ZIP)
6.41k
6.68k (x1.04)
Test#1 (Memory)
13.87k
14.98k (x1.08)
TOTAL
77.34k
81.91k (x1.06)

Multithread

i5-9600KF

i9-9900K
Test#1 (Integers)
174.66k
242.98k (x1.39)
Test#2 (FP)
154.06k
220.16k (x1.43)
Test#3 (Generic, ZIP)
34.11k
53.97k (x1.58)
Test#1 (Memory)
8.24k
12.22k (x1.48)
TOTAL
371.08k
529.32k (x1.43)

Performance/W
i5-9600KF
i9-9900K
Test#1 (Integers)
1839 points/W
2558 points/W
Test#2 (FP)
1622 points/W
2317 points/W
Test#3 (Generic, ZIP)
359 points/W
568 points/W
Test#1 (Memory)
87 points/W
129 points/W
TOTAL
3906 points/W
5572 points/W

Performance/GHz
i5-9600KF
i9-9900K
Test#1 (Integers)
6635 points/GHz
6417 points/GHz
Test#2 (FP)
5769 points/GHz
5634 points/GHz
Test#3 (Generic, ZIP)
1394 points/GHz
1335 points/GHz
Test#1 (Memory)
3015 points/GHz
2996 points/GHz
TOTAL
16813 points/GHz
16382 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