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Core i7-7700K vs i5-8500


Description
The i7-7700K is based on Kaby Lake architecture while the i5-8500 is based on Coffee Lake.

Using the multithread performance as a reference, the i7-7700K gets a score of 291.1 k points while the i5-8500 gets 307.5 k points.

Summarizing, the i5-8500 is 1.1 times faster than the i7-7700K . To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
906e9
906ea
Core
Kaby Lake-S
Coffee Lake-S
Architecture
Base frecuency
4.2 GHz
3 GHz
Boost frecuency
4.5 GHz
4.1 GHz
Socket
LGA 1151
LGA 1151
Cores/Threads
4/8
6/6
TDP
95 W
65 W
Cache L1 (d+i)
32+32 kB
6x32+6x32 kB
Cache L2
256 kB
6x256 kB
Cache L3
8192 kB
9216 kB
Date
September 2016
March 2018

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
i7-7700K
i5-8500
Test#1 (Integers)
4629
4192 (-9.46%)
Test#2 (FP)
18925
17378 (-8.17%)
Test#3 (Generic, ZIP)
6221
5462 (-12.21%)
Test#1 (Memory)
13922
11924 (-14.35%)
TOTAL
43698
38956 (-10.85%)

Multithread

i7-7700K

i5-8500
Test#1 (Integers)
18529
27672 (49.34%)
Test#2 (FP)
86487
94071 (8.77%)
Test#3 (Generic, ZIP)
28778
29055 (0.96%)
Test#1 (Memory)
9674
4386 (-54.66%)
TOTAL
143468
155184 (8.17%)

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
i7-7700K
i5-8500
Test#1 (Integers)
17549
15208 (-13.34%)
Test#2 (FP)
27822
22940 (-17.55%)
Test#3 (Generic, ZIP)
6796
5538 (-18.52%)
Test#1 (Memory)
14832
11389 (-23.21%)
TOTAL
66999
55075 (-17.80%)

Multithread

i7-7700K

i5-8500
Test#1 (Integers)
68395
79517 (16.26%)
Test#2 (FP)
118805
107776 (-9.28%)
Test#3 (Generic, ZIP)
33336
31885 (-4.35%)
Test#1 (Memory)
17434
13367 (-23.33%)
TOTAL
237970
232546 (-2.28%)

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
i7-7700K
i5-8500
Test#1 (Integers)
30864
27359 (-11.36%)
Test#2 (FP)
27262
24271 (-10.97%)
Test#3 (Generic, ZIP)
6421
5691 (-11.36%)
Test#1 (Memory)
13994
11765 (-15.93%)
TOTAL
78541
69087 (-12.04%)

Multithread

i7-7700K

i5-8500
Test#1 (Integers)
129531
144773 (11.77%)
Test#2 (FP)
122200
129040 (5.60%)
Test#3 (Generic, ZIP)
29617
29526 (-0.31%)
Test#1 (Memory)
9751
4185 (-57.08%)
TOTAL
291099
307524 (5.64%)

Performance/W
i7-7700K
i5-8500
Test#1 (Integers)
1363 points/W
2227 points/W
Test#2 (FP)
1286 points/W
1985 points/W
Test#3 (Generic, ZIP)
312 points/W
454 points/W
Test#1 (Memory)
103 points/W
64 points/W
TOTAL
3064 points/W
4731 points/W

Performance/GHz
i7-7700K
i5-8500
Test#1 (Integers)
6859 points/GHz
6673 points/GHz
Test#2 (FP)
6058 points/GHz
5920 points/GHz
Test#3 (Generic, ZIP)
1427 points/GHz
1388 points/GHz
Test#1 (Memory)
3110 points/GHz
2870 points/GHz
TOTAL
17453 points/GHz
16850 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