Core i5-9600KF vs i5-9600K

Description

Both models i5-9600KF and i5-9600K 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 i5-9600K gets 372.7 k points.

Summarizing, the i5-9600K is 1 times faster than the i5-9600KF. To get a proper comparison between both models, take a look to the data shown below.

Specs

i5-9600KF

i5-9600K

CPUID

906ec

906ed

Core

Coffee Lake-S

Architecture

Coffee Lake

Base frecuency

3.7 GHz

Boost frecuency

4.6 GHz

Socket

LGA 1151

Cores/Threads

6/6

TDP

95 W

Cache L1 (d+i)

6x32+6x32 kB

Cache L2

6x256 kB

Cache L3

9216 kB

Date

January 2019

October 2018

Mean monothread perf.

77.34k points

77.75k points

Mean multithread perf.

371.08k 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

i5-9600KF

i5-9600K

Test#1 (Integers)

4.63k

4.69k (x1.01)

Test#2 (FP)

19.43k

19.35k (x1)

Test#3 (Generic, ZIP)

6.17k

6.08k (x0.99)

Test#1 (Memory)

13.82k

13.81k (x1)

TOTAL

44.04k

43.93k (x1)

Multithread

i5-9600KF

i5-9600K

Test#1 (Integers)

26.64k

26.24k (x0.99)

Test#2 (FP)

110.11k

107.95k (x0.98)

Test#3 (Generic, ZIP)

33.07k

34.5k (x1.04)

Test#1 (Memory)

8.3k

8.1k (x0.98)

TOTAL

178.11k

176.79k (x0.99)

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

i5-9600K

Test#1 (Integers)

16.5k

16.91k (x1.03)

Test#2 (FP)

24.35k

24.42k (x1)

Test#3 (Generic, ZIP)

6.54k

6.37k (x0.97)

Test#1 (Memory)

13.59k

13.55k (x1)

TOTAL

60.98k

61.25k (x1)

Multithread

i5-9600KF

i5-9600K

Test#1 (Integers)

93.78k

95.21k (x1.02)

Test#2 (FP)

134.47k

137.3k (x1.02)

Test#3 (Generic, ZIP)

32.24k

36.05k (x1.12)

Test#1 (Memory)

8.22k

8.4k (x1.02)

TOTAL

268.71k

276.96k (x1.03)

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

i5-9600K

Test#1 (Integers)

16.92k

16.75k (x0.99)

Test#2 (FP)

25.44k

25.5k (x1)

Test#3 (Generic, ZIP)

6.36k

6.17k (x0.97)

Test#1 (Memory)

13.25k

13.06k (x0.99)

TOTAL

61.97k

61.48k (x0.99)

Multithread

i5-9600KF

i5-9600K

Test#1 (Integers)

95.51k

96.03k (x1.01)

Test#2 (FP)

143.19k

143.78k (x1)

Test#3 (Generic, ZIP)

33.85k

35.06k (x1.04)

Test#1 (Memory)

8.21k

8.45k (x1.03)

TOTAL

280.77k

283.33k (x1.01)

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

i5-9600K

Test#1 (Integers)

30.52k

30.64k (x1)

Test#2 (FP)

26.54k

26.75k (x1.01)

Test#3 (Generic, ZIP)

6.41k

6.33k (x0.99)

Test#1 (Memory)

13.87k

14.03k (x1.01)

TOTAL

77.34k

77.75k (x1.01)

Multithread

i5-9600KF

i5-9600K

Test#1 (Integers)

174.66k

174.92k (x1)

Test#2 (FP)

154.06k

153.88k (x1)

Test#3 (Generic, ZIP)

34.11k

35.93k (x1.05)

Test#1 (Memory)

8.24k

8k (x0.97)

TOTAL

371.08k

372.74k (x1)

Performance/W

i5-9600KF

i5-9600K

Test#1 (Integers)

1839 points/W

1841 points/W

Test#2 (FP)

1622 points/W

1620 points/W

Test#3 (Generic, ZIP)

359 points/W

378 points/W

Test#1 (Memory)

87 points/W

84 points/W

TOTAL

3906 points/W

3924 points/W

Performance/GHz

i5-9600KF

i5-9600K

Test#1 (Integers)

6635 points/GHz

6661 points/GHz

Test#2 (FP)

5769 points/GHz

5815 points/GHz

Test#3 (Generic, ZIP)

1394 points/GHz

1376 points/GHz

Test#1 (Memory)

3015 points/GHz

3049 points/GHz

TOTAL

16813 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]

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.

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