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Core i5-9600K vs i9-9900K


Description
Both models i5-9600K 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 i5-9600K gets a score of 372.7 k points while the i9-9900K gets 529.3 k points.

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

Specs
CPUID
906ed
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
October 2018
October 2018
Mean monothread perf.
77.75k points
81.91k points
Mean multithread perf.
372.74k 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
i5-9600K
i9-9900K
Test#1 (Integers)
4.69k
5k (x1.07)
Test#2 (FP)
19.35k
20.22k (x1.04)
Test#3 (Generic, ZIP)
6.08k
6.54k (x1.08)
Test#1 (Memory)
13.81k
13.78k (x1)
TOTAL
43.93k
45.53k (x1.04)

Multithread

i5-9600K

i9-9900K
Test#1 (Integers)
26.24k
36.39k (x1.39)
Test#2 (FP)
107.95k
166.55k (x1.54)
Test#3 (Generic, ZIP)
34.5k
54.92k (x1.59)
Test#1 (Memory)
8.1k
8.96k (x1.11)
TOTAL
176.79k
266.82k (x1.51)

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
i5-9600K
i9-9900K
Test#1 (Integers)
16.91k
18.03k (x1.07)
Test#2 (FP)
24.42k
25.98k (x1.06)
Test#3 (Generic, ZIP)
6.37k
6.86k (x1.08)
Test#1 (Memory)
13.55k
14.5k (x1.07)
TOTAL
61.25k
65.37k (x1.07)

Multithread

i5-9600K

i9-9900K
Test#1 (Integers)
95.21k
131.34k (x1.38)
Test#2 (FP)
137.3k
204.76k (x1.49)
Test#3 (Generic, ZIP)
36.05k
55.74k (x1.55)
Test#1 (Memory)
8.4k
8.99k (x1.07)
TOTAL
276.96k
400.83k (x1.45)

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
i5-9600K
i9-9900K
Test#1 (Integers)
16.75k
17.98k (x1.07)
Test#2 (FP)
25.5k
27.04k (x1.06)
Test#3 (Generic, ZIP)
6.17k
6.63k (x1.07)
Test#1 (Memory)
13.06k
13.6k (x1.04)
TOTAL
61.48k
65.24k (x1.06)

Multithread

i5-9600K

i9-9900K
Test#1 (Integers)
96.03k
130.88k (x1.36)
Test#2 (FP)
143.78k
208.5k (x1.45)
Test#3 (Generic, ZIP)
35.06k
54.12k (x1.54)
Test#1 (Memory)
8.45k
8.91k (x1.05)
TOTAL
283.33k
402.41k (x1.42)

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
i5-9600K
i9-9900K
Test#1 (Integers)
30.64k
32.08k (x1.05)
Test#2 (FP)
26.75k
28.17k (x1.05)
Test#3 (Generic, ZIP)
6.33k
6.68k (x1.05)
Test#1 (Memory)
14.03k
14.98k (x1.07)
TOTAL
77.75k
81.91k (x1.05)

Multithread

i5-9600K

i9-9900K
Test#1 (Integers)
174.92k
242.98k (x1.39)
Test#2 (FP)
153.88k
220.16k (x1.43)
Test#3 (Generic, ZIP)
35.93k
53.97k (x1.5)
Test#1 (Memory)
8k
12.22k (x1.53)
TOTAL
372.74k
529.32k (x1.42)

Performance/W
i5-9600K
i9-9900K
Test#1 (Integers)
1841 points/W
2558 points/W
Test#2 (FP)
1620 points/W
2317 points/W
Test#3 (Generic, ZIP)
378 points/W
568 points/W
Test#1 (Memory)
84 points/W
129 points/W
TOTAL
3924 points/W
5572 points/W

Performance/GHz
i5-9600K
i9-9900K
Test#1 (Integers)
6661 points/GHz
6417 points/GHz
Test#2 (FP)
5815 points/GHz
5634 points/GHz
Test#3 (Generic, ZIP)
1376 points/GHz
1335 points/GHz
Test#1 (Memory)
3049 points/GHz
2996 points/GHz
TOTAL
16902 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