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Core i7-7700K vs i7-6700K


Description
The i7-7700K is based on Kaby Lake architecture while the i7-6700K is based on Skylake.

Using the multithread performance as a reference, the i7-7700K gets a score of 291.1 k points while the i7-6700K gets 254.6 k points.

Summarizing, the i7-7700K is 1.1 times faster than the i7-6700K . To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
906e9
506e3
Core
Kaby Lake-S
Skylake-S
Architecture
Base frecuency
4.2 GHz
4 GHz
Boost frecuency
4.5 GHz
4.2 GHz
Socket
LGA 1151
LGA 1151
Cores/Threads
4/8
4/8
TDP
95 W
95 W
Cache L1 (d+i)
32+32 kB
32+32 kB
Cache L2
256 kB
256 kB
Cache L3
8192 kB
8192 kB
Date
September 2016
May 2015

Non-optimized benchmark
The benchmark in Mode 0 (FPU) measures cpu performance with non-optimized software. It uses the basic µinstructions from the i386 architecture with the i387 floating point unit. This mode is compatible with all CPUs so it's practical to compare very different CPUs
Monothread
i7-7700K
i7-6700K
Test#1 (Integers)
4629
4072 (-12.04%)
Test#2 (FP)
18925
16620 (-12.18%)
Test#3 (Generic, ZIP)
6221
5225 (-16.01%)
Test#1 (Memory)
13922
6279 (-54.90%)
TOTAL
43698
32196 (-26.32%)

Multithread

i7-7700K

i7-6700K
Test#1 (Integers)
18529
16366 (-11.68%)
Test#2 (FP)
86487
77341 (-10.57%)
Test#3 (Generic, ZIP)
28778
25654 (-10.86%)
Test#1 (Memory)
9674
10206 (5.50%)
TOTAL
143468
129568 (-9.69%)

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
i7-7700K
i7-6700K
Test#1 (Integers)
30864
25782 (-16.46%)
Test#2 (FP)
27262
23081 (-15.34%)
Test#3 (Generic, ZIP)
6421
5325 (-17.07%)
Test#1 (Memory)
13994
9031 (-35.47%)
TOTAL
78541
63219 (-19.51%)

Multithread

i7-7700K

i7-6700K
Test#1 (Integers)
129531
112827 (-12.90%)
Test#2 (FP)
122200
106861 (-12.55%)
Test#3 (Generic, ZIP)
29617
25758 (-13.03%)
Test#1 (Memory)
9751
9116 (-6.52%)
TOTAL
291099
254562 (-12.55%)

Performance/W
i7-7700K
i7-6700K
Test#1 (Integers)
1363 points/W
1188 points/W
Test#2 (FP)
1286 points/W
1125 points/W
Test#3 (Generic, ZIP)
312 points/W
271 points/W
Test#1 (Memory)
103 points/W
96 points/W
TOTAL
3064 points/W
2680 points/W

Performance/GHz
i7-7700K
i7-6700K
Test#1 (Integers)
6859 points/GHz
6139 points/GHz
Test#2 (FP)
6058 points/GHz
5495 points/GHz
Test#3 (Generic, ZIP)
1427 points/GHz
1268 points/GHz
Test#1 (Memory)
3110 points/GHz
2150 points/GHz
TOTAL
17453 points/GHz
15052 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