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Core i7-8700k vs i5-9600K


Description
Both models i7-8700k 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 i7-8700k gets a score of 443.8 k points while the i5-9600K gets 372.7 k points.

Summarizing, the i7-8700k is 1.2 times faster than the i5-9600K. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
906ea
906ed
Core
Coffee Lake-S
Coffee Lake-S
Architecture
Base frecuency
3.7 GHz
3.7 GHz
Boost frecuency
4.7 GHz
4.6 GHz
Socket
LGA 1151
LGA 1151
Cores/Threads
6/12
6/6
TDP
95 W
95 W
Cache L1 (d+i)
6x32+6x32 kB
6x32+6x32 kB
Cache L2
6x256 kB
6x256 kB
Cache L3
12288 kB
9216 kB
Date
October 2017
October 2018

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
i7-8700k
i5-9600K
Test#1 (Integers)
4127
4688 (13.59%)
Test#2 (FP)
16959
19351 (14.11%)
Test#3 (Generic, ZIP)
5564
6083 (9.34%)
Test#1 (Memory)
12845
13807 (7.49%)
TOTAL
39495
43929 (11.23%)

Multithread

i7-8700k

i5-9600K
Test#1 (Integers)
24011
26240 (9.28%)
Test#2 (FP)
108690
107946 (-0.69%)
Test#3 (Generic, ZIP)
36616
34499 (-5.78%)
Test#1 (Memory)
9327
8102 (-13.13%)
TOTAL
178644
176786 (-1.04%)

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
i7-8700k
i5-9600K
Test#1 (Integers)
12920
16910 (30.88%)
Test#2 (FP)
20678
24418 (18.09%)
Test#3 (Generic, ZIP)
5295
6374 (20.38%)
Test#1 (Memory)
12587
13546 (7.62%)
TOTAL
51480
61248 (18.98%)

Multithread

i7-8700k

i5-9600K
Test#1 (Integers)
94259
95215 (1.01%)
Test#2 (FP)
152549
137300 (-10.00%)
Test#3 (Generic, ZIP)
39735
36047 (-9.28%)
Test#1 (Memory)
8527
8396 (-1.55%)
TOTAL
295071
276957 (-6.14%)

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
i7-8700k
i5-9600K
Test#1 (Integers)
16874
16747 (-0.75%)
Test#2 (FP)
26119
25497 (-2.38%)
Test#3 (Generic, ZIP)
6329
6171 (-2.49%)
Test#1 (Memory)
13708
13062 (-4.72%)
TOTAL
63030
61477 (-2.46%)

Multithread

i7-8700k

i5-9600K
Test#1 (Integers)
105740
96034 (-9.18%)
Test#2 (FP)
180520
143784 (-20.35%)
Test#3 (Generic, ZIP)
44994
35064 (-22.07%)
Test#1 (Memory)
8512
8453 (-0.69%)
TOTAL
339766
283334 (-16.61%)

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
i7-8700k
i5-9600K
Test#1 (Integers)
31204
30642 (-1.80%)
Test#2 (FP)
27821
26751 (-3.85%)
Test#3 (Generic, ZIP)
6568
6331 (-3.61%)
Test#1 (Memory)
15004
14028 (-6.51%)
TOTAL
80598
77751 (-3.53%)

Multithread

i7-8700k

i5-9600K
Test#1 (Integers)
202422
174924 (-13.58%)
Test#2 (FP)
186332
153881 (-17.42%)
Test#3 (Generic, ZIP)
44958
35932 (-20.08%)
Test#1 (Memory)
10054
8000 (-20.42%)
TOTAL
443765
372737 (-16.01%)

Performance/W
i7-8700k
i5-9600K
Test#1 (Integers)
2131 points/W
1841 points/W
Test#2 (FP)
1961 points/W
1620 points/W
Test#3 (Generic, ZIP)
473 points/W
378 points/W
Test#1 (Memory)
106 points/W
84 points/W
TOTAL
4671 points/W
3924 points/W

Performance/GHz
i7-8700k
i5-9600K
Test#1 (Integers)
6639 points/GHz
6661 points/GHz
Test#2 (FP)
5919 points/GHz
5815 points/GHz
Test#3 (Generic, ZIP)
1397 points/GHz
1376 points/GHz
Test#1 (Memory)
3192 points/GHz
3049 points/GHz
TOTAL
17148 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]

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. 3.7.9