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Core i7-8700k vs i7-8086K


Description
Both models i7-8700k and i7-8086K 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 i7-8086K gets 466.1 k points.

Summarizing, the i7-8086K is 1.1 times faster than the i7-8700k. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
906ea
906ea
Core
Coffee Lake-S
Coffee Lake-S
Architecture
Base frecuency
3.7 GHz
4 GHz
Boost frecuency
4.7 GHz
5 GHz
Socket
LGA 1151
LGA 1151
Cores/Threads
6/12
6/12
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
12288 kB
Date
October 2017
Jun 2018

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
i7-8086K
Test#1 (Integers)
31204
32428 (3.92%)
Test#2 (FP)
27821
28607 (2.82%)
Test#3 (Generic, ZIP)
6568
6706 (2.10%)
Test#1 (Memory)
15004
16003 (6.66%)
TOTAL
80598
83744 (3.90%)

Multithread

i7-8700k

i7-8086K
Test#1 (Integers)
202422
211180 (4.33%)
Test#2 (FP)
186332
196703 (5.57%)
Test#3 (Generic, ZIP)
44958
47632 (5.95%)
Test#1 (Memory)
10054
10607 (5.50%)
TOTAL
443765
466121 (5.04%)

Performance/W
i7-8700k
i7-8086K
Test#1 (Integers)
2131 points/W
2223 points/W
Test#2 (FP)
1961 points/W
2071 points/W
Test#3 (Generic, ZIP)
473 points/W
501 points/W
Test#1 (Memory)
106 points/W
112 points/W
TOTAL
4671 points/W
4907 points/W

Performance/GHz
i7-8700k
i7-8086K
Test#1 (Integers)
6639 points/GHz
6486 points/GHz
Test#2 (FP)
5919 points/GHz
5721 points/GHz
Test#3 (Generic, ZIP)
1397 points/GHz
1341 points/GHz
Test#1 (Memory)
3192 points/GHz
3201 points/GHz
TOTAL
17148 points/GHz
16749 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