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Core i7-8700k vs i9-10940X


Description
The i7-8700k is based on Coffee Lake architecture while the i9-10940X is based on Cascade Lake.

Using the multithread performance as a reference, the i7-8700k gets a score of 443.8 k points while the i9-10940X gets 1088.1 k points.

Summarizing, the i9-10940X is 2.5 times faster than the i7-8700k. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
906ea
50657
Core
Coffee Lake-S
Cascade Lake-X
Architecture
Base frecuency
3.7 GHz
3.3 GHz
Boost frecuency
4.7 GHz
4.8 GHz
Socket
LGA 1151
LGA 2066
Cores/Threads
6/12
14/28
TDP
95 W
165 W
Cache L1 (d+i)
6x32+6x32 kB
14x32+14x32 kB
Cache L2
6x256 kB
14x1024 kB
Cache L3
12288 kB
19712 kB
Date
October 2017
November 2019

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
i9-10940X
Test#1 (Integers)
31204
29746 (-4.67%)
Test#2 (FP)
27821
27440 (-1.37%)
Test#3 (Generic, ZIP)
6568
5809 (-11.55%)
Test#1 (Memory)
15004
9047 (-39.71%)
TOTAL
80598
72043 (-10.61%)

Multithread

i7-8700k

i9-10940X
Test#1 (Integers)
202422
485371 (139.78%)
Test#2 (FP)
186332
472703 (153.69%)
Test#3 (Generic, ZIP)
44958
113090 (151.55%)
Test#1 (Memory)
10054
16945 (68.55%)
TOTAL
443765
1088110 (145.20%)

Performance/W
i7-8700k
i9-10940X
Test#1 (Integers)
2131 points/W
2942 points/W
Test#2 (FP)
1961 points/W
2865 points/W
Test#3 (Generic, ZIP)
473 points/W
685 points/W
Test#1 (Memory)
106 points/W
103 points/W
TOTAL
4671 points/W
6595 points/W

Performance/GHz
i7-8700k
i9-10940X
Test#1 (Integers)
6639 points/GHz
6197 points/GHz
Test#2 (FP)
5919 points/GHz
5717 points/GHz
Test#3 (Generic, ZIP)
1397 points/GHz
1210 points/GHz
Test#1 (Memory)
3192 points/GHz
1885 points/GHz
TOTAL
17148 points/GHz
15009 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