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Core i7-8700k vs i5-9500


Description
Both models i7-8700k and i5-9500 are based on Coffee Lake architecture.

Coffee Lake is the second refinement of Intel’s 14nm (Tri-Gate) technology. While it uses LGA1151 socket, it is incompatible with previous generations due to electrical changes in socket’s pins so these CPUs require Z370 chipset. This kind of generation introduced more cores in every range to compete with new AMD’s architecture. Coffee Lake uses DDR4 memory at 2400MHz for i3 and at 2666MHz for i5, i7 CPUs plus iGPU frequency has been increased 50MHz with respect to previous generation.

Using the multithread performance as a reference, the i7-8700k gets a score of 443.8 k points while the i5-9500 gets 352.8 k points.

Summarizing, the i7-8700k is 1.3 times faster than the i5-9500. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
906ea
906ea
Core
Coffee Lake-S
Coffee Lake-S
Architecture
Base frecuency
3.7 GHz
3 GHz
Boost frecuency
4.7 GHz
4.4 GHz
Socket
LGA 1151
LGA 1151
Cores/Threads
6/12
6/6
TDP
95 W
65 W
Cache L1 (d+i)
6x32+6x32 kB
6x32+6x32 kB
Cache L2
6x256 kB
6x256 kB
Cache L3
12288 kB
9216 kB
Date
October 2017
April 2019

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
i5-9500
Test#1 (Integers)
4127
4453 (7.91%)
Test#2 (FP)
16959
18427 (8.65%)
Test#3 (Generic, ZIP)
5564
5836 (4.89%)
Test#1 (Memory)
12845
12627 (-1.70%)
TOTAL
39495
41343 (4.68%)

Multithread

i7-8700k

i5-9500
Test#1 (Integers)
24011
24752 (3.09%)
Test#2 (FP)
108690
103097 (-5.15%)
Test#3 (Generic, ZIP)
36616
32434 (-11.42%)
Test#1 (Memory)
9327
5564 (-40.34%)
TOTAL
178644
165847 (-7.16%)

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
i5-9500
Test#1 (Integers)
12920
16060 (24.30%)
Test#2 (FP)
20678
23193 (12.16%)
Test#3 (Generic, ZIP)
5295
6099 (15.18%)
Test#1 (Memory)
12587
12792 (1.63%)
TOTAL
51480
58143 (12.94%)

Multithread

i7-8700k

i5-9500
Test#1 (Integers)
94259
90443 (-4.05%)
Test#2 (FP)
152549
131230 (-13.98%)
Test#3 (Generic, ZIP)
39735
33851 (-14.81%)
Test#1 (Memory)
8527
5589 (-34.46%)
TOTAL
295071
261113 (-11.51%)

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
i5-9500
Test#1 (Integers)
16874
16137 (-4.37%)
Test#2 (FP)
26119
24178 (-7.43%)
Test#3 (Generic, ZIP)
6329
5873 (-7.20%)
Test#1 (Memory)
13708
12504 (-8.79%)
TOTAL
63030
58692 (-6.88%)

Multithread

i7-8700k

i5-9500
Test#1 (Integers)
105740
92208 (-12.80%)
Test#2 (FP)
180520
137916 (-23.60%)
Test#3 (Generic, ZIP)
44994
33115 (-26.40%)
Test#1 (Memory)
8512
5558 (-34.70%)
TOTAL
339766
268798 (-20.89%)

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
i5-9500
Test#1 (Integers)
31204
29166 (-6.53%)
Test#2 (FP)
27821
25490 (-8.38%)
Test#3 (Generic, ZIP)
6568
5840 (-11.08%)
Test#1 (Memory)
15004
13155 (-12.33%)
TOTAL
80598
73651 (-8.62%)

Multithread

i7-8700k

i5-9500
Test#1 (Integers)
202422
166657 (-17.67%)
Test#2 (FP)
186332
146896 (-21.16%)
Test#3 (Generic, ZIP)
44958
34036 (-24.29%)
Test#1 (Memory)
10054
5253 (-47.75%)
TOTAL
443765
352842 (-20.49%)

Performance/W
i7-8700k
i5-9500
Test#1 (Integers)
2131 points/W
2564 points/W
Test#2 (FP)
1961 points/W
2260 points/W
Test#3 (Generic, ZIP)
473 points/W
524 points/W
Test#1 (Memory)
106 points/W
81 points/W
TOTAL
4671 points/W
5428 points/W

Performance/GHz
i7-8700k
i5-9500
Test#1 (Integers)
6639 points/GHz
6629 points/GHz
Test#2 (FP)
5919 points/GHz
5793 points/GHz
Test#3 (Generic, ZIP)
1397 points/GHz
1327 points/GHz
Test#1 (Memory)
3192 points/GHz
2990 points/GHz
TOTAL
17148 points/GHz
16739 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