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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
Mean monothread perf.
80.6k points
61.51k points
Mean multithread perf.
443.77k points
191.71k 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
i7-8700k
i5-7500
Test#1 (Integers)
4.13k
3.87k (x0.94)
Test#2 (FP)
16.96k
16.09k (x0.95)
Test#3 (Generic, ZIP)
5.56k
5.11k (x0.92)
Test#1 (Memory)
12.85k
7.97k (x0.62)
TOTAL
39.5k
33.04k (x0.84)

Multithread

i7-8700k

i5-7500
Test#1 (Integers)
24.01k
14.81k (x0.62)
Test#2 (FP)
108.69k
61.51k (x0.57)
Test#3 (Generic, ZIP)
36.62k
19.59k (x0.53)
Test#1 (Memory)
9.33k
3.68k (x0.39)
TOTAL
178.64k
99.59k (x0.56)

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
i5-7500
Test#1 (Integers)
12.92k
14.09k (x1.09)
Test#2 (FP)
20.68k
19.8k (x0.96)
Test#3 (Generic, ZIP)
5.3k
5.34k (x1.01)
Test#1 (Memory)
12.59k
8.45k (x0.67)
TOTAL
51.48k
47.67k (x0.93)

Multithread

i7-8700k

i5-7500
Test#1 (Integers)
94.26k
53.99k (x0.57)
Test#2 (FP)
152.55k
77.43k (x0.51)
Test#3 (Generic, ZIP)
39.74k
20.81k (x0.52)
Test#1 (Memory)
8.53k
2.53k (x0.3)
TOTAL
295.07k
154.77k (x0.52)

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)
16.87k
14.03k (x0.83)
Test#2 (FP)
26.12k
21.07k (x0.81)
Test#3 (Generic, ZIP)
6.33k
5.15k (x0.81)
Test#1 (Memory)
13.71k
7.77k (x0.57)
TOTAL
63.03k
48.03k (x0.76)

Multithread

i7-8700k

i5-7500
Test#1 (Integers)
105.74k
50.12k (x0.47)
Test#2 (FP)
180.52k
74.8k (x0.41)
Test#3 (Generic, ZIP)
44.99k
19.69k (x0.44)
Test#1 (Memory)
8.51k
5.19k (x0.61)
TOTAL
339.77k
149.79k (x0.44)

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)
31.2k
25.59k (x0.82)
Test#2 (FP)
27.82k
22.57k (x0.81)
Test#3 (Generic, ZIP)
6.57k
5.27k (x0.8)
Test#1 (Memory)
15k
8.08k (x0.54)
TOTAL
80.6k
61.51k (x0.76)

Multithread

i7-8700k

i5-7500
Test#1 (Integers)
202.42k
88.3k (x0.44)
Test#2 (FP)
186.33k
78.59k (x0.42)
Test#3 (Generic, ZIP)
44.96k
19.72k (x0.44)
Test#1 (Memory)
10.05k
5.1k (x0.51)
TOTAL
443.77k
191.71k (x0.43)

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. 3.11.4