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Core i7-8700k vs i7-6900K


Description
The i7-8700k is based on Coffee Lake architecture while the i7-6900K is based on Broadwell.

Using the multithread performance as a reference, the i7-8700k gets a score of 443.8 k points while the i7-6900K gets 427.5 k points.

Summarizing, the i7-8700k is 1 times faster than the i7-6900K . To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
906ea
406f1
Core
Coffee Lake-S
Broadwell-E
Architecture
Base frecuency
3.7 GHz
3.2 GHz
Boost frecuency
4.7 GHz
3.7 GHz
Socket
LGA 1151
LGA 2011-3
Cores/Threads
6/12
8/16
TDP
95 W
140 W
Cache L1 (d+i)
6x32+6x32 kB
8x32+8x32 kB
Cache L2
6x256 kB
8x256 kB
Cache L3
12288 kB
20480 kB
Date
October 2017
September 2016

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
i7-6900K
Test#1 (Integers)
31204
23113 (-25.93%)
Test#2 (FP)
27821
17840 (-35.88%)
Test#3 (Generic, ZIP)
6568
5343 (-18.65%)
Test#1 (Memory)
15004
3469 (-76.88%)
TOTAL
80598
49764 (-38.26%)

Multithread

i7-8700k

i7-6900K
Test#1 (Integers)
202422
184187 (-9.01%)
Test#2 (FP)
186332
181197 (-2.76%)
Test#3 (Generic, ZIP)
44958
47442 (5.53%)
Test#1 (Memory)
10054
14686 (46.07%)
TOTAL
443765
427512 (-3.66%)

Performance/W
i7-8700k
i7-6900K
Test#1 (Integers)
2131 points/W
1316 points/W
Test#2 (FP)
1961 points/W
1294 points/W
Test#3 (Generic, ZIP)
473 points/W
339 points/W
Test#1 (Memory)
106 points/W
105 points/W
TOTAL
4671 points/W
3054 points/W

Performance/GHz
i7-8700k
i7-6900K
Test#1 (Integers)
6639 points/GHz
6247 points/GHz
Test#2 (FP)
5919 points/GHz
4822 points/GHz
Test#3 (Generic, ZIP)
1397 points/GHz
1444 points/GHz
Test#1 (Memory)
3192 points/GHz
938 points/GHz
TOTAL
17148 points/GHz
13450 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