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Core i7-8700k vs i5-5675R


Description
The i7-8700k is based on Coffee Lake architecture while the i5-5675R is based on Broadwell.

Using the multithread performance as a reference, the i7-8700k gets a score of 443.8 k points while the i5-5675R gets 194.2 k points.

Summarizing, the i7-8700k is 2.3 times faster than the i5-5675R. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
906ea
40671
Core
Coffee Lake-S
Bradwell-H
Architecture
Base frecuency
3.7 GHz
3.1 GHz
Boost frecuency
4.7 GHz
3.6 GHz
Socket
LGA 1151
BGA1364
Cores/Threads
6/12
4/4
TDP
95 W
65 W
Cache L1 (d+i)
6x32+6x32 kB
4x32+4x32 kB
Cache L2
6x256 kB
4x256 kB
Cache L3
12288 kB
4096 kB
Date
October 2017
Jun 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
i7-8700k
i5-5675R
Test#1 (Integers)
4127
4141 (0.33%)
Test#2 (FP)
16959
14355 (-15.36%)
Test#3 (Generic, ZIP)
5564
4940 (-11.21%)
Test#1 (Memory)
12845
5474 (-57.38%)
TOTAL
39495
28910 (-26.80%)

Multithread

i7-8700k

i5-5675R
Test#1 (Integers)
24011
16021 (-33.28%)
Test#2 (FP)
108690
54597 (-49.77%)
Test#3 (Generic, ZIP)
36616
18694 (-48.94%)
Test#1 (Memory)
9327
16865 (80.83%)
TOTAL
178644
106178 (-40.56%)

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
i7-8700k
i5-5675R
Test#1 (Integers)
12920
12856 (-0.50%)
Test#2 (FP)
20678
16855 (-18.49%)
Test#3 (Generic, ZIP)
5295
5190 (-1.99%)
Test#1 (Memory)
12587
5494 (-56.35%)
TOTAL
51480
40394 (-21.54%)

Multithread

i7-8700k

i5-5675R
Test#1 (Integers)
94259
50071 (-46.88%)
Test#2 (FP)
152549
64608 (-57.65%)
Test#3 (Generic, ZIP)
39735
19838 (-50.07%)
Test#1 (Memory)
8527
17086 (100.37%)
TOTAL
295071
151603 (-48.62%)

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
i5-5675R
Test#1 (Integers)
16874
12881 (-23.66%)
Test#2 (FP)
26119
18271 (-30.05%)
Test#3 (Generic, ZIP)
6329
5120 (-19.10%)
Test#1 (Memory)
13708
5450 (-60.25%)
TOTAL
63030
41722 (-33.81%)

Multithread

i7-8700k

i5-5675R
Test#1 (Integers)
105740
49914 (-52.80%)
Test#2 (FP)
180520
70302 (-61.06%)
Test#3 (Generic, ZIP)
44994
19689 (-56.24%)
Test#1 (Memory)
8512
16924 (98.84%)
TOTAL
339766
156830 (-53.84%)

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
i5-5675R
Test#1 (Integers)
31204
21912 (-29.78%)
Test#2 (FP)
27821
18590 (-33.18%)
Test#3 (Generic, ZIP)
6568
5203 (-20.79%)
Test#1 (Memory)
15004
5723 (-61.86%)
TOTAL
80598
51428 (-36.19%)

Multithread

i7-8700k

i5-5675R
Test#1 (Integers)
202422
84920 (-58.05%)
Test#2 (FP)
186332
72090 (-61.31%)
Test#3 (Generic, ZIP)
44958
20126 (-55.23%)
Test#1 (Memory)
10054
17065 (69.75%)
TOTAL
443765
194201 (-56.24%)

Performance/W
i7-8700k
i5-5675R
Test#1 (Integers)
2131 points/W
1306 points/W
Test#2 (FP)
1961 points/W
1109 points/W
Test#3 (Generic, ZIP)
473 points/W
310 points/W
Test#1 (Memory)
106 points/W
263 points/W
TOTAL
4671 points/W
2988 points/W

Performance/GHz
i7-8700k
i5-5675R
Test#1 (Integers)
6639 points/GHz
6087 points/GHz
Test#2 (FP)
5919 points/GHz
5164 points/GHz
Test#3 (Generic, ZIP)
1397 points/GHz
1445 points/GHz
Test#1 (Memory)
3192 points/GHz
1590 points/GHz
TOTAL
17148 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. 3.7.9