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Core i7-8700k vs i5-7500


Description
The i7-8700k is based on Coffee Lake architecture while the i5-7500 is based on Kaby Lake.

Using the multithread performance as a reference, the i7-8700k gets a score of 443.8 k points while the i5-7500 gets 191.7 k points.

Summarizing, the i7-8700k is 2.3 times faster than the i5-7500 . To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
906ea
906e9
Core
Coffee Lake-S
Kaby Lake-S
Architecture
Base frecuency
3.7 GHz
3.4 GHz
Boost frecuency
4.7 GHz
3.8 GHz
Socket
LGA 1151
LGA 1151
Cores/Threads
6/12
4/4
TDP
95 W
65 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
September 2016

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
i5-7500
Test#1 (Integers)
4127
3866 (-6.33%)
Test#2 (FP)
16959
16093 (-5.11%)
Test#3 (Generic, ZIP)
5564
5107 (-8.22%)
Test#1 (Memory)
12845
7972 (-37.94%)
TOTAL
39495
33037 (-16.35%)

Multithread

i7-8700k

i5-7500
Test#1 (Integers)
24011
14813 (-38.31%)
Test#2 (FP)
108690
61512 (-43.41%)
Test#3 (Generic, ZIP)
36616
19586 (-46.51%)
Test#1 (Memory)
9327
3682 (-60.52%)
TOTAL
178644
99593 (-44.25%)

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
i5-7500
Test#1 (Integers)
12920
14088 (9.04%)
Test#2 (FP)
20678
19797 (-4.26%)
Test#3 (Generic, ZIP)
5295
5344 (0.92%)
Test#1 (Memory)
12587
8445 (-32.90%)
TOTAL
51480
47673 (-7.39%)

Multithread

i7-8700k

i5-7500
Test#1 (Integers)
94259
53994 (-42.72%)
Test#2 (FP)
152549
77435 (-49.24%)
Test#3 (Generic, ZIP)
39735
20810 (-47.63%)
Test#1 (Memory)
8527
2534 (-70.28%)
TOTAL
295071
154773 (-47.55%)

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
i5-7500
Test#1 (Integers)
16874
14035 (-16.82%)
Test#2 (FP)
26119
21073 (-19.32%)
Test#3 (Generic, ZIP)
6329
5152 (-18.60%)
Test#1 (Memory)
13708
7769 (-43.33%)
TOTAL
63030
48027 (-23.80%)

Multithread

i7-8700k

i5-7500
Test#1 (Integers)
105740
50118 (-52.60%)
Test#2 (FP)
180520
74801 (-58.56%)
Test#3 (Generic, ZIP)
44994
19688 (-56.24%)
Test#1 (Memory)
8512
5187 (-39.06%)
TOTAL
339766
149793 (-55.91%)

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
i5-7500
Test#1 (Integers)
31204
25590 (-17.99%)
Test#2 (FP)
27821
22569 (-18.88%)
Test#3 (Generic, ZIP)
6568
5272 (-19.73%)
Test#1 (Memory)
15004
8077 (-46.17%)
TOTAL
80598
61507 (-23.69%)

Multithread

i7-8700k

i5-7500
Test#1 (Integers)
202422
88299 (-56.38%)
Test#2 (FP)
186332
78591 (-57.82%)
Test#3 (Generic, ZIP)
44958
19716 (-56.15%)
Test#1 (Memory)
10054
5104 (-49.23%)
TOTAL
443765
191710 (-56.80%)

Performance/W
i7-8700k
i5-7500
Test#1 (Integers)
2131 points/W
1358 points/W
Test#2 (FP)
1961 points/W
1209 points/W
Test#3 (Generic, ZIP)
473 points/W
303 points/W
Test#1 (Memory)
106 points/W
79 points/W
TOTAL
4671 points/W
2949 points/W

Performance/GHz
i7-8700k
i5-7500
Test#1 (Integers)
6639 points/GHz
6734 points/GHz
Test#2 (FP)
5919 points/GHz
5939 points/GHz
Test#3 (Generic, ZIP)
1397 points/GHz
1387 points/GHz
Test#1 (Memory)
3192 points/GHz
2125 points/GHz
TOTAL
17148 points/GHz
16186 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