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Core i7-6700K vs i5-5675R


Description
The i7-6700K is based on Skylake architecture while the i5-5675R is based on Broadwell.

Using the multithread performance as a reference, the i7-6700K gets a score of 254.6 k points while the i5-5675R gets 194.2 k points.

Summarizing, the i7-6700K is 1.3 times faster than the i5-5675R. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
506e3
40671
Core
Skylake-S
Bradwell-H
Architecture
Base frecuency
4 GHz
3.1 GHz
Boost frecuency
4.2 GHz
3.6 GHz
Socket
LGA 1151
BGA1364
Cores/Threads
4/8
4/4
TDP
95 W
65 W
Cache L1 (d+i)
4x32+4x32 kB
4x32+4x32 kB
Cache L2
256 kB
4x256 kB
Cache L3
8192 kB
4096 kB
Date
May 2015
June 2015
Mean monothread perf.
63.22k points
51.43k points
Mean multithread perf.
254.56k points
194.2k points

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
i7-6700K
i5-5675R
Test#1 (Integers)
4.07k
4.14k (x1.02)
Test#2 (FP)
16.62k
14.35k (x0.86)
Test#3 (Generic, ZIP)
5.23k
4.94k (x0.95)
Test#1 (Memory)
6.28k
5.47k (x0.87)
TOTAL
32.2k
28.91k (x0.9)

Multithread

i7-6700K

i5-5675R
Test#1 (Integers)
16.37k
16.02k (x0.98)
Test#2 (FP)
77.34k
54.6k (x0.71)
Test#3 (Generic, ZIP)
25.65k
18.69k (x0.73)
Test#1 (Memory)
10.21k
16.87k (x1.65)
TOTAL
129.57k
106.18k (x0.82)

SSE3 optimized benchmark
The benchmark in mode I (SSE) is optimized for the use of SIMD instructions with 128 bits register and the SSE set up to version 3. Nearly every modern CPU has support for this mode.
Monothread
i7-6700K
i5-5675R
Test#1 (Integers)
14.73k
12.86k (x0.87)
Test#2 (FP)
21.27k
16.85k (x0.79)
Test#3 (Generic, ZIP)
5.52k
5.19k (x0.94)
Test#1 (Memory)
6.32k
5.49k (x0.87)
TOTAL
47.84k
40.39k (x0.84)

Multithread

i7-6700K

i5-5675R
Test#1 (Integers)
61.09k
50.07k (x0.82)
Test#2 (FP)
99.17k
64.61k (x0.65)
Test#3 (Generic, ZIP)
26.57k
19.84k (x0.75)
Test#1 (Memory)
10.26k
17.09k (x1.67)
TOTAL
197.09k
151.6k (x0.77)

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
i7-6700K
i5-5675R
Test#1 (Integers)
25.78k
21.91k (x0.85)
Test#2 (FP)
23.08k
18.59k (x0.81)
Test#3 (Generic, ZIP)
5.32k
5.2k (x0.98)
Test#1 (Memory)
9.03k
5.72k (x0.63)
TOTAL
63.22k
51.43k (x0.81)

Multithread

i7-6700K

i5-5675R
Test#1 (Integers)
112.83k
84.92k (x0.75)
Test#2 (FP)
106.86k
72.09k (x0.67)
Test#3 (Generic, ZIP)
25.76k
20.13k (x0.78)
Test#1 (Memory)
9.12k
17.07k (x1.87)
TOTAL
254.56k
194.2k (x0.76)

Performance/W
i7-6700K
i5-5675R
Test#1 (Integers)
1188 points/W
1306 points/W
Test#2 (FP)
1125 points/W
1109 points/W
Test#3 (Generic, ZIP)
271 points/W
310 points/W
Test#1 (Memory)
96 points/W
263 points/W
TOTAL
2680 points/W
2988 points/W

Performance/GHz
i7-6700K
i5-5675R
Test#1 (Integers)
6139 points/GHz
6087 points/GHz
Test#2 (FP)
5495 points/GHz
5164 points/GHz
Test#3 (Generic, ZIP)
1268 points/GHz
1445 points/GHz
Test#1 (Memory)
2150 points/GHz
1590 points/GHz
TOTAL
15052 points/GHz
14286 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