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Core i7-8700 vs i7-8086K


Description
Both models i7-8700 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 i7-8700 gets a score of 389 k points while the i7-8086K gets 352.4 k points.

Summarizing, the i7-8700 is 1.1 times faster than the i7-8086K . 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
3.2 GHz
4 GHz
Boost frecuency
4.6 GHz
5 GHz
Socket
LGA 1151
LGA 1151
Cores/Threads
6/12
6/12
TDP
65 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
June 2018
Mean monothread perf.
75.01k points
72.95k points
Mean multithread perf.
388.95k points
352.4k points

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
i7-8700
i7-8086K
Test#1 (Integers)
29.25k
28.74k (x0.98)
Test#2 (FP)
25.98k
25.31k (x0.97)
Test#3 (Generic, ZIP)
6.05k
5.78k (x0.96)
Test#1 (Memory)
13.74k
13.12k (x0.96)
TOTAL
75.01k
72.95k (x0.97)

Multithread

i7-8700

i7-8086K
Test#1 (Integers)
182.56k
160.53k (x0.88)
Test#2 (FP)
159.9k
147.29k (x0.92)
Test#3 (Generic, ZIP)
38.18k
35.65k (x0.93)
Test#1 (Memory)
8.31k
8.92k (x1.07)
TOTAL
388.95k
352.4k (x0.91)

Performance/W
i7-8700
i7-8086K
Test#1 (Integers)
2809 points/W
1690 points/W
Test#2 (FP)
2460 points/W
1550 points/W
Test#3 (Generic, ZIP)
587 points/W
375 points/W
Test#1 (Memory)
128 points/W
94 points/W
TOTAL
5984 points/W
3709 points/W

Performance/GHz
i7-8700
i7-8086K
Test#1 (Integers)
6358 points/GHz
5748 points/GHz
Test#2 (FP)
5647 points/GHz
5063 points/GHz
Test#3 (Generic, ZIP)
1316 points/GHz
1156 points/GHz
Test#1 (Memory)
2986 points/GHz
2624 points/GHz
TOTAL
16307 points/GHz
14590 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