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Core i5-6600K vs i7-8700k


Description
The i5-6600K is based on Skylake architecture while the i7-8700k is based on Coffee Lake.

Using the multithread performance as a reference, the i5-6600K gets a score of 209.3 k points while the i7-8700k gets 339.8 k points.

Summarizing, the i7-8700k is 1.6 times faster than the i5-6600K . To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
506e3
906ea
Core
Skylake-S
Coffee Lake-S
Architecture
Base frecuency
3.5 GHz
3.7 GHz
Boost frecuency
3.9 GHz
4.7 GHz
Socket
LGA 1151
LGA 1151
Cores/Threads
4/4
6/12
TDP
95 W
95 W
Cache L1 (d+i)
4x32+4x32 kB
6x32+6x32 kB
Cache L2
256 kB
6x256 kB
Cache L3
6144 kB
12288 kB
Date
May 2015
October 2017
Mean monothread perf.
59.28k points
80.6k points
Mean multithread perf.
209.28k points
443.77k points

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
i5-6600K
i7-8700k
Test#1 (Integers)
17.24k
16.87k (x0.98)
Test#2 (FP)
26.5k
26.12k (x0.99)
Test#3 (Generic, ZIP)
6.45k
6.33k (x0.98)
Test#1 (Memory)
9.09k
13.71k (x1.51)
TOTAL
59.28k
63.03k (x1.06)

Multithread

i5-6600K

i7-8700k
Test#1 (Integers)
68.47k
105.74k (x1.54)
Test#2 (FP)
105.05k
180.52k (x1.72)
Test#3 (Generic, ZIP)
25.24k
44.99k (x1.78)
Test#1 (Memory)
10.5k
8.51k (x0.81)
TOTAL
209.28k
339.77k (x1.62)

Performance/W
i5-6600K
i7-8700k
Test#1 (Integers)
721 points/W
1113 points/W
Test#2 (FP)
1106 points/W
1900 points/W
Test#3 (Generic, ZIP)
266 points/W
474 points/W
Test#1 (Memory)
111 points/W
90 points/W
TOTAL
2203 points/W
3576 points/W

Performance/GHz
i5-6600K
i7-8700k
Test#1 (Integers)
4420 points/GHz
3590 points/GHz
Test#2 (FP)
6795 points/GHz
5557 points/GHz
Test#3 (Generic, ZIP)
1653 points/GHz
1347 points/GHz
Test#1 (Memory)
2331 points/GHz
2917 points/GHz
TOTAL
15199 points/GHz
13411 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