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Core i7-8700k vs i5-6600K


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

Using the multithread performance as a reference, the i7-8700k gets a score of 339.8 k points while the i5-6600K gets 209.3 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
906ea
506e3
Core
Coffee Lake-S
Skylake-S
Architecture
Base frecuency
3.7 GHz
3.5 GHz
Boost frecuency
4.7 GHz
3.9 GHz
Socket
LGA 1151
LGA 1151
Cores/Threads
6/12
4/4
TDP
95 W
95 W
Cache L1 (d+i)
6x32+6x32 kB
32+32 kB
Cache L2
6x256 kB
256 kB
Cache L3
12288 kB
6144 kB
Date
October 2017
May 2015

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
i5-6600K
Test#1 (Integers)
16874
17238 (2.16%)
Test#2 (FP)
26119
26500 (1.46%)
Test#3 (Generic, ZIP)
6329
6446 (1.85%)
Test#1 (Memory)
13708
9092 (-33.68%)
TOTAL
63030
59276 (-5.96%)

Multithread

i7-8700k

i5-6600K
Test#1 (Integers)
105740
68474 (-35.24%)
Test#2 (FP)
180520
105055 (-41.80%)
Test#3 (Generic, ZIP)
44994
25244 (-43.89%)
Test#1 (Memory)
8512
10503 (23.39%)
TOTAL
339766
209276 (-38.41%)

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

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